OBD Software

TOAD Auto Diagnostics

The TOAD system is a suite of car diagnostic tools and tuning software. Loaded with all the same functions used by dealerships and constantly updated by expert engineers, so youll always be supported. The included manuals contain thousands of pages of fault codes, patches, PCB layouts, and step-by-step instructions on how to fix any code. Structured with pictures, schematics, and easy to follow directions any novice can understand. For those who are more advanced, the manuals also have comprehensive sections that go in depth covering every possible aspect, no matter how complex. Save hundreds of dollars by doing the diagnostics yourself and use the supplied manuals to help walk you through the process of fixing the problem. Never hesitate to contact the customer support team with any question about your repairs or ECU chiptuning problems. Continue reading...

Total OBD & ECU Auto Diagnostics Overview

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Contents: Software
Author: Alex Eisenberg
Official Website: www.totalcardiagnostics.com
Price: $127.00

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Total OBD and ECU Auto Diagnostics Review

Highly Recommended

It is pricier than all the other ebooks out there, but it is produced by a true expert and is full of proven practical tips.

All the modules inside this book are very detailed and explanatory, there is nothing as comprehensive as this guide.

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OBDII OnBoard Diagnostic System Generation Continued

As a result of these technical breakthroughs and because existing I M programs have proven to be less effective than desired in detecting critical emissions control system defects which occur during normal road load operation, a more comprehensive OBD system was developed under the direction of CARB. OBD-II, which is implemented over the 1994 through 1996 model years, adds catalyst efficiency monitoring, engine misfire detection, canister purge system monitoring, secondary air system monitoring, and EGR system flow rate monitoring. Additionally, a serial data stream consisting of twenty basic data parameters and diagnostic trouble codes is a required part of the diagnostic system. In addition to the basic required OBD-II data stream, Toyota has an enhanced data stream which consists of approximately 60 additional data words. Access to all OBD-II data is made by connecting a generic scan tool to a standardized Data Link Connector (DLC) located under the left side of the instrument...

Check Any Other Dtcs Output In Addition To Dtc P

(a) Connect the intelligent tester to the DLC3. (b) Turn the ignition switch to ON and turn the intelligent tester ON. (c) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (d) Read DTCs. Result P0125 and other DTCs If any DTCs other than P0125 are output, troubleshoot those DTCs first.

Check Any Other Dtcs Output In Addition To Dtc Pa

(a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (e) Read DTCs. P2A00 and other DTCs If any DTCs relating to the A F sensor (DTCs for the A F sensor heater or A F sensor admittance) are output, troubleshoot those DTCs first.

Check Any Other Dtcs Output In Addition To P Or P

(a) Connect an intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (e) Read DTCs. P2195 or P2196 and other DTCs If any DTCs relating to the A F sensor (DTCs for the A F sensor heater or A F sensor admittance) are output, troubleshoot those DTCs first.

Check Any Other Dtcs Output In Addition To Misfire Dtcs

(a) Connect an intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (e) Read DTCs. P0300, P0301, P0302, P0303, P0304, P0305 and or P0306 and other DTCs If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305 and P0306 are output, troubleshoot those DTCs first.

Check Any Other Dtcs Output In Addition To Dtc P P P Or P

(a) Connect an intelligent tester to the DLC3. (c) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (d) Read DTCs. P0171, P0172, P0174 or P0175 and other DTCs If any DTCs other than P0171, P0172, P0174 or P0175 are output, troubleshoot those DTCs first.

Check Any Other Dtcs Output In Addition To P P P Or P

(a) Connect an intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (e) Read DTCs. P2195, P2196, P2197 or P2198 and other DTCs If any DTCs other than P2195, P2196, P2197 or P2198 are output, troubleshoot those DTCs first.

Read Value Of Intelligent Tester Test Value Of Af Sensor

(a) Connect an intelligent tester to the DLC3. (c) Clear DTCs (See page ES-38). (e) Select the following menu items on the tester DIAGNOSIS ENHANCED OBD II MONITOR INFO MONITOR STATUS. (g) Select the following menu items DIAGNOSIS ENHANCED OBD II MONITOR INFO TEST RESULT RANGE B1S1, then press the ENTER button.

Check Any Other Dtcs Output In Addition To Dtc Pa Andor Pa

(a) Connect an intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (e) Read DTCs. P2A00 and or P2A03 and other DTCs If any DTCs other than P2A00 or P2A03 are output, troubleshoot those DTCs first. (a) Connect an intelligent tester to the DLC3. (c) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (d) Read DTCs. (a) Connect an intelligent tester to the DLC3. (c) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (d) Read DTCs.

Check Other Dtcs Output In Addition To Dtc P

(a) Connect the OBD II scan tool or intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3. (b) Turn the ignition switch on (IG) and turn the OBD II scan tool or the intelligent tester main switch ON. (c) When you use intelligent tester Select the item DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (d) Read the DTCs using the OBD II scan tool or the intelligent tester. P0771 and other DTCs If any other codes besides P0771 are output, perform the troubleshooting for those DTCs first.

Check Any Other Dtcs Output In Addition To Dtc Pa Andor Pb

(a) Connect the intelligent tester to the DLC3. (d) Select the following the menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (e) Read the DTCs. P050A and or P050B and other DTCs If any DTCs other than P050A and P050B are output, troubleshoot those DTCs first.

Check Any Other Dtcs Output In Addition To Dtc P Or P

(a) Connect the intelligent tester to the DLC3. (c) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (d) Read the DTCs. P0171 or P0172 and other DTCs If any DTCs other than P0171 or P0172 are output, troubleshoot those DTCs first. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (A F CONTROL) Connect the intelligent tester to the DLC3. Start the engine and turn the tester on. Warm up the engine at an engine speed of 2,500 rpm for approximately 90 seconds. On the tester, select the following menu items DIAGNOSIS ENHANCED OBD II ACTIVE TEST A F CONTROL. To display the graph, select the following menu items on the tester DIAGNOSIS ENHANCED OBD II ACTIVE TEST A F CONTROL USER DATA AFS B1S1 and O2S B1S2 then press the YES button and then the ENTER button followed by the F4 button. READ VALUE USING INTELLIGENT TESTER (MAF) Connect the intelligent tester to the DLC3. Select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST PRIMARY MAF and COOLANT TEMP....

OBDII OnBoard Diagnostic System Generation

Although OBD supplies valuable information about a number of critical emissions related systems and components, there are several important items which were not incorporated into the OBD standard due to technical limitations at the time that the system was phased into production (during the 1988 model year.) Since the introduction of OBD, several technical breakthroughs have occurred. For example, the technology to monitor engine misfire and catalyst efficiency has been developed and implemented on production vehicles.

NOTE Start the inspection from step in the case of using the Toyota handheld tester and start from step in the case of

Connect the TOYOTA hand-held tester to the DLC3. b. Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON. c. Select the DATALIST mode on the TOYOTA hand-held tester. (Item STEERING ANG) Check that the steering wheel turning angle value of the steering angle sensor displayed on the TOYOTA hand-held tester is changing when turning the steering wheel.

NOTE During testing if DTCs other than DTC B are displayed disregard them

Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES under DIAGNOSTICS. If DTC 51-B0107 is not displayed, go to next step. If DTC 51-B0107 is displayed, replace air bag sensor assembly. 4. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect passenger-side air bag module connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES under...

NOTE During testing if DTCs other than DTC B are displayed disregard them Diagnostic Procedure

Reconnect air bag sensor assembly connector A19 to air bag sensor assembly. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve DTCs. See RETRIEVING CODES under DIAGNOSTICS. If DTC 47 B0115 is not displayed, go to next step. If DTC 47 B0115 is displayed, replace air bag sensor assembly. 4. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect left side air bag squib connector. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve...

NOTE When reading DTCs be sure to be seated in the drivers seat and depressing the brake pedal

Fig. 18 Identifying DLC3 Terminal Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 18 Identifying DLC3 Terminal Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. If 2 or more trouble codes are identified at the same time, the codes will be displayed in ascending order.

Diagnostic Trouble Code Chart

If a DTC is displayed during the DTC check, check the circuit indicated by the DTC. For details of each code, refer to the See page in the DTC chart. Control Module Communication Bus OFF CAN communication system CAN communication system (Skid control ECU to yaw rate and acceleration sensor) In some cases, the intelligent tester cannot be used when the ABS warning light remains on. 4. CAN communication system CAN communication system (Skid control ECU to ECM) CAN communication system (Skid control ECU to yaw rate and acceleration sensor) CAN communication system (Skid control ECU to steering angle sensor) In some cases, the intelligent tester cannot be used when the VSC warning light remains on. The speed sensor detects wheel speed and transmits the appropriate signals to the skid control ECU. These signals are used for control of the ABS system. Each of the front and rear rotors has 48 serrations. When the rotors rotate, the magnetic field generated by the permanent magnet in the...

Diagnostic Trouble Code Check Procedure

Diagnostic Trouble Code Check (Make a note of and then clear) Diagnostic Trouble Code Check Diagnostic Trouble Code Display Same diagnostic trouble code is displayed The problem is still occurring in a place other than in the diagnostic circuit (The diagnostic trouble code displayed first is either for a past problem or it is a secondary problem) Taking into account the above points, a flow chart showing how to proceed with troubleshooting using the diagnostic trouble code check is shown below. ThiS'flow chart shows how to utilize the diagnostic trouble code check effectively, then by carefully checking the results, indicates how to proceed either to diagnostic trouble code troubleshooting or to troubleshooting of problem symptoms. Diagnostic trouble code check Making a note of and clearing of the diagnostic trouble codes displayed

Open or Short in Heated Oxygen HO Sensor Circuit DTCs P and P or P and P

High or Low Impedance of Heated Oxygen (HO2) Sensor (DTCs P0136 and P0156 or P0137 and P0157) DTCs P0136 and P0156 indicate the deterioration of the HO2 sensor. The ECM sets the DTCs by calculating the impedance of the sensor when the typical enabling conditions are satisfied (2 driving cycle). DTCs P0137 and P0157 indicate an open or short circuit in the HO2 sensor (2 driving cycle). The ECM sets the DTCs when the impedance of the sensor exceeds the threshold 15 kQ. Related DTCs

Start the inspection from step in case of using the Toyota handheld tester and start from step in case of not using the

Vsc Trac Buzzer Where Rav4 2006

Connect the TOYOTA hand-held tester to the DLC3. b. Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON. c. Select the ACTIVE TEST mode on the TOYOTA hand-held tester. Check ON-OFF function of the VSC buzzer with the TOYOTA hand-held tester. Connecting terminals Tc and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light, VSC TRAC warning light and BRAKE warning light. 1. Check voltage between terminals Tc and CG of the DLC3. PREPARATION Fig. 110 Checking Voltage Between Terminals Tc & CG Of DLC3 Fig. 110 Checking Voltage Between Terminals Tc & CG Of DLC3 Measure voltage between terminal Tc and CG of DLC3. OK 2. With ignition switch OFF, check for open and short circuit in harness and connector between SKID CONTROL ECU AND DLC3, DLC3 AND BODY GROUND . Transition to the sensor check mode can be performed by connecting terminals Ts and CG of the DLC3 and turning the ignition switch from OFF to ON. 1. Check voltage...

Connect Obd Ii scan tool or Toyota handheld tester and read value of engine coolant temperature

Jinma 284 Ignition Switch Wiring

(a) Connect the OBD II scan tool or TOYOTA hand-held tester to the DLC3. (b) Turn the ignition switch ON and push the OBD II scan tool or TOYOTA hand-held tester main switch ON. Read temperature value on the OBD II scan tool or TOYOTA hand-held tester. OK If there is open circuit, OBD II scan tool or TOYOTA hand-held tester indicates -40 C (-40 F). If there is open circuit, OBD II scan tool or TOYOTA hand-held tester indicates 140 C (284 F) or more. Read temperature value on the OBD II scan tool or TOYOTA

NOTE Start the inspection from step in case of using the Toyota handheld tester and start from step in case of not

2002 Sequoia Lights Diagram

Connect the TOYOTA hand-held tester to the DLC3. b. Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON. c. Select the ACTIVE TEST mode on the TOYOTA hand-held tester. Check that ON and OFF of the VSC TRAC warning light can be shown on the combination meter with the TOYOTA hand-held tester.

Clear Dtc Using Intelligent Tester

Hook up the intelligent tester to the DLC3. c. Operate the intelligent tester to erase the codes. Please refer to the intelligent tester operator's manual for further Intelligent r details. Fig. 23 Connecting Intelligent Tester To DLC3 Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 23 Connecting Intelligent Tester To DLC3 Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Dtc Vehicle Can Communication Malfunction description

Vsc Vehicle Skid Control

The circuit is used to send TRAC and VSC control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU via the CAN communication system. This DTC is output when communication between the translate ECU and the skid control ECU is cut off. ENG+, ENG- circuit (CAN communication system) Fig. 29 Vehicle CAN Communication Malfunction Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 29 Vehicle CAN Communication Malfunction Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Clear Dtc Using the Intelligent tester

Connect the intelligent tester to the DLC3. d. Enter the following menus DIAGNOSIS ENHANCED OBD II DTC INFO CLEAR CODES. DLC3 CAN VIM Fig. 29 Connecting Cable Of Intelligent Tester To DLC3 DLC3 CAN VIM Fig. 29 Connecting Cable Of Intelligent Tester To DLC3 3. CLEAR DTC (Without using the Intelligent tester) Intelligent tester only NOTE All the stored DTCs and freeze frame data are erased if 1) the ECM is changed from normal mode to check mode or vice versa or 2) the ignition switch is turned from ON to ACC or OFF while in check mode. Before changing modes, always check and make a note of any DTCs and freeze frame data.

NOTE There is a case that Toyota handheld tester cannot be used when ECU is abnormal

Engine Schematic Diagram

In case of using the TOYOTA hand-held tester PREPARATION a. Connect the TOYOTA hand-held tester to the DLC3. b. Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON. c. Select the ACTIVE TEST mode on the TOYOTA hand-held tester. Check that ON and OFF of the ABS warning light can be shown on the combination meter by the TOYOTA hand-held tester. In case of not using the TOYOTA hand-held tester PREPARATION

Perform Active Test Using Intelligent Tester Brake Warning Light

Intelligent Tester Intelligent Tester (a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS OBD MOBD select vehicle ACTIVE TEST BRAKE WARN LAMP. (e) Check that the BRAKE warning light turns on and off in the combination meter using the intelligent tester. OK

Check Dtc Using Intelligent Tester

Toyota Dlc3 4runner

Connect the intelligent tester to the DLC3. Refer to the intelligent tester operator's manual for further details. DLC3 Fig. 20 Connecting Intelligent Tester To DLC3 Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. a. Using SST, connect terminals TC and CG of the DLC3. Fig. 21 Identifying DLC3 Terminal Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 21 Identifying DLC3 Terminal Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. e. Remove the SST from the terminals of the DLC3.

OBD OnBoard Diagnostic System Generation

Toyota Engine Diagnostic Receipt

In April 1985, the California Air Resources Board (CARB) approved On-Board Diagnostic system regulations, referred to as OBD. These regulations, which apply to almost all 1988 and newer cars and light trucks marketed in the State of California, require that the engine control module (ECM) monitor critical emission related components for proper operation and illuminate a malfunction indicator lamp (MIL) on the instrument panel when a malfunction is detected. The OBD system also provides for a system of Diagnostic Trouble Codes (DTC) and fault isolation logic charts in the repair manual, to assist technicians in determining the likely cause of engine control and emissions system malfunctions. The basic objectives of this regulation are twofold OBD self diagnosis applies to systems which are considered to be most likely to cause a significant increase in exhaust emissions if a malfunction occurs. Most notably, this includes

OBD Diagnostic Trouble Codes DTC

Diagnostic Trouble Codes or DTCs are generated by the on-board diagnostic system and stored in the ECM memory. They indicate the circuit in which a fault has been detected. DTC information remains stored in the ECM long term memory regardless of whether a continuous (hard) fault or intermittent fault caused the code to set. Toyota products with OBD will continue to store a DTC in the ECM long term memory until the code is cleared by removing power from the ECM BATT terminal. In most cases, the EFI fuse powers this keep alive memory.

Hybrid Vehicle Control Electronic Control Unit

Hybrid Vehicle (HV) control Electronic Control Unit (ECU) is used for controlling the hybrid system which uses the gasoline engine along with the AC electric motor for vehicle operation. Hybrid vehicle control ECU is referred to as HV ECU. The HV ECU is located below carpet on floor panel, just below passenger's side of instrument panel. HV ECU receives input information from various sensors and electronic control units and determines the torque and output power. HV ECU delivers the demand torque and target RPM to ECM. The ECM uses this input information for controlling throttle opening, fuel injection system, ignition timing and Variable Valve Timing (VVT) system. The ECM delivers the actual engine RPM to the HV ECU. When vehicle is stopped, the HV ECU may deliver a signal to the ECM to indicate that vehicle is stopped. ECM uses this for reducing fuel consumption.

Toyota Yaris Can Bus Circuit

CHECK CAN BUS LINES FOR SHORT CIRCUIT (D-CAN J C - AIR CONDITIONING AMPLIFIER) CHECK CAN BUS LINES FOR SHORT CIRCUIT (D-CAN J C - CENTER AIRBAG SENSOR ASSEMBLY) CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM MAIN WIRE) CHECK CAN BUS LINES FOR SHORT CIRCUIT (BRAKE ACTUATOR (SKID CONTROL ECU) BRANCH WIRE) CHECK CAN BUS LINES FOR SHORT CIRCUIT (AIR CONDITIONING AMPLIFIER BRANCH WIRE) CHECK CAN BUS LINES FOR SHORT CIRCUIT (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE) CHECK CAN BUS LINES FOR SHORT CIRCUIT (P-CAN J C - POWER STEERING ECU) CHECK CAN BUS LINES FOR SHORT CIRCUIT (P-CAN J C - MAIN BODY ECU) CHECK CAN BUS LINES FOR SHORT CIRCUIT (P-CAN J C - COMBINATION METER ECU) CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU MAIN WIRE)

Precautions For Can Communication

(a) CAN communication lines are used to receive information from the skid control ECU (ABS ECU) and the ECM, and to transmit warnings to the combination meter. When there are any problems in the CAN communication lines, DTCs of the CAN communication line are output. (b) Perform troubleshooting of the communication line problems when the CAN communication DTCs are output. Be sure to start troubleshooting on the electronic power steering system after confirming that the CAN communication system is normal. (c) Since the CAN communication line has its own length and route, it cannot be repaired temporarily with the bypass wire, etc.

Symptom Confirmation And Diagnostic Trouble Code Check

The diagnostic system in the TERCEL fulfills various functions. The first function is the Diagnostic Trouble Code Check in which a malfunction in the signal circuits to the ECU is stored in code in the ECU memory at the time of occurrence, to be output by the technician during troubleshooting. Another function is the Input Signal Check which checks if the signals from various switches are sent to the ECU correctly. Diagnostic Trouble Code Check In diagnostic trouble code check, it is very important to determine whether the problem indicated by the diagnostic trouble code is still occurring or occurred in the past but returned to normal at present. In addition, it must be checked in the problem symptom check whether the malfunction indicated by the diagnostic trouble code is directly related to the problem symptom or not. For this reason, the diagnostic trouble codes should be checked before and after the symptom confirmation to determine the current conditions, as shown in the table...

Symptom Confirmation And Diagnostic Trouble Code

0 The diagnostic system in COROLLA has various functions. The first function is the Diagnostic Trouble Code (DTC) Check, in which a malfunction in the signal circuits to the ECU is stored in code form in the ECU memory. Another function is the Input Signal Check, which checks if the signals from various switches are sent to the ECU correctly. By using these check functions, it is possible to quickly narrow down potential problem areas and troubleshooting can be performed effectively. The diagnostic functions are incorporated in the following systems in the COROLLA. In the DTC check, it is very important to determine whether the problem indicated by the DTC is still occurring or has occurred in the past but returned to normal at present. In addition during the problem symptom check, it a check must be made on whether the malfunction indicated by the DTC is directly related to the problem symptom or not. For this reason, the DTC should be checked before and after symptom confirmation to...

Read Value Of Intelligent Tester Fuel Trim

Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter. (a) Connect an intelligent tester to the DLC3. Turn the ignition switch ON. Turn the tester ON. Select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST PRIMARY SHORT FT 1 and LONG FT 1. Read the values displayed on the tester. Add together the SHORT FT 1 and LONG FT 1 values to obtain the total FUEL TRIM. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (PURGE VSV) Connect the intelligent tester to the DLC3. Turn the ignition switch to ON. Turn the tester ON. Select the following menu items DIAGNOSIS ENHANCED OBD II ACTIVE TEST EVAP VSV. Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV) (a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II ACTIVE TEST VVT CTRL B1. READ VALUE OF INTELLIGENT TESTER (ENGINE SPD) (a) Connect an...

The Obdii Diagnostic Circuit

Obd Scan Tool Diagram

The OBD-II data line is a bi-directional communication link which is capable of transmitting and receiving data. This feature allows the Diagnostic Tester to operate system actuators and send commands to the ECM in addition to displaying system data. The high speed OBD-II data stream typically consists of 50 to 75 data words representing virtually all sensor inputs, actuator outputs, several calculated parameters, many fuel feedback related parameters, and cylinder misfire data. The data is transmitted at a rate of 10.4 Kilo baud, giving the Diagnostic Tester a display refresh rate capability of approximately once every 200 milliseconds. Data is accessed from DLC 3, terminal 2. It is triggered by a communication signal generated by the Diagnostic Tester when any OBD-II function has been selected. On OBD-Il vehicles, the scan tool reads DTCs directly from the serial data stream, therefore, codes are displayed almost instantly. Codes can only be retrieved and displayed using the...

Read Value Using Intelligent Tester Starter Signal

Connect the intelligent tester to the DLC3. Turn the ignition switch ON and turn the tester ON. Select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST PRIMARY STARTER SIG. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) Connect the intelligent tester to the DLC3. Turn the ignition switch ON and turn the tester ON. Select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST PRIMARY STARTER SIG.

Abnormal Voltage Output of HO Sensor DTCs P and P

While the ECM is performing active air-fuel ratio control, the air-fuel ratio is forcibly regulated to become rich or lean. If the sensor is not functioning properly, the voltage output variation is small. For example, when the HO2 sensor voltage does not decrease to less than 0.21 V and does not increase to more than 0.59 V during active air-fuel ratio control, the ECM determines that the sensor voltage output is abnormal and sets DTCs P0136 and P0156.

NOTE When alternately grounding terminals Tc and AB release ground from one terminal and immediately ground the other

Terminal AB twice each, in cycles of 1-2 to 1 1-2 seconds (sequence is Tc, AB, Tc, AB). Finally, keep applying body ground to terminal Tc until AIR BAG warning light flashes quickly, indicating DTCs are cleared. Using Toyota Hand-held Tester Connect Toyota hand-held tester to DLC3. DLC3 is located under left side of instrument panel. Clear DTCs by

Can Communication System Check

(a) Check for the output DTC relating to the CAN communication system. HINT The ECU of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, be sure to check that there is no trouble in the CAN communication system. CAN communication system DTC not output CAN communication system DTC output CAN COMMUNICATION SYSTEM CAN COMMUNICATION SYSTEM DTC CHECK* When 2 or more DTCs are detected, perform circuit inspections one by one until the problem is identified.

Read Value Using Intelligent Tester Fuel Trim

Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter. (a) Connect the intelligent tester to the DLC3. Turn the ignition switch to the ON position. Turn the tester on. Select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST PRIMARY SHORT FT 1 and LONG FT 1. Read the values displayed on the tester. Add together the SHORT FT 1 and LONG FT 1 values to obtain the total FUEL TRIM. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV) (a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II ACTIVE TEST VVT CTRL B1. (a) Connect the intelligent tester to the DLC3. Turn the ignition switch to the ON position. Turn the tester on. Clear the DTCs (See page ES-38). Switch the ECM from normal mode to check mode using the tester (See page ES-41). Start the engine to idle for a minute. OK Read the DTCs. OK

The OBD Diagnostic Circuit

2002 Toyota 4runner Dlc Terminal

Diagnostic Trouble Codes can be displayed using the Diagnostic Tester or by grounding the TE1 circuit and counting the Malfunction Indicator Lamp (MIL) flashes. The scan tool reads codes by counting the low voltage pulses on the W terminal of the Diagnostic Link Connector (DLC). Therefore, code retrieval is a relatively slow process, especially when multiple codes are stored. Diagnostic Trouble Codes can be displayed using the Diagnostic Tester or by grounding the TE1 circuit and counting the Malfunction Indicator Lamp (MIL) flashes. The scan tool reads codes by counting the low voltage pulses on the W terminal of the Diagnostic Link Connector (DLC). Therefore, code retrieval is a relatively slow process, especially when multiple codes are stored.

Standardization of Service Information and DTCs

Under the provisions of OBD-II regulations, emissions related diagnostic and service information will be readily available to the service industry, from the vehicle manufacturer. This information includes procedures and specifications necessary to diagnose the engine control system. Although enhanced diagnostics may be available using special equipment and procedures, at a minimum, repair procedures will be written using the generic scan tool and other commonly available test equipment like multimeters and oscilloscopes. In an effort to simplify diagnostics, OBD-II requires that all manufacturers standardize DTCs on OBD-II equipped vehicles. Eventually, all emissions related service information will be standardized in format and available through an electronic media.

Dtc Check Clear

When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are erased. Before changing modes, always check and make a note of any DTCs and freeze frame data. HINT DTCs which are stored in the ECM can be displayed on the intelligent tester. The intelligent tester can display current and pending DTCs. Some DTCs are not set if the ECM does not detect the same malfunction again during a second consecutive driving cycle. However, such malfunctions, detected on only one occasion, are stored as pending DTCs. 1. CHECK FOR DTC (Using intelligent tester) (a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES or PENDING CODES. 2. CLEAR DTC (Using intelligent tester) (a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CLEAR CODES. 3. CLEAR DTC (Without using intelligent...

Dtc Check

2002 Toyota Sequoia Ignition Switch

Checking DTCs using intelligent tester. 1. Connect the intelligent tester to the DLC3. Fig. 16 Connecting Intelligent Tester To DLC3 Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 16 Connecting Intelligent Tester To DLC3 Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 3. Read DTCs by following the prompts on the tester screen. Refer to intelligent tester operator's manual for further details.

Toyota Obd Ii C1532

The fail-safe function operates to stop power assist when DTCs indicating ECU malfunctions are output. However, the power assist operation continues when DTC C1534 34 is output because it indicates an EEPROM error in the ECU. (a) Check for DTCs. OK DTCs other than C1531 31, C1532 32, C1533 33, C1534 34 and C1535 35 are not output. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

Related Dtcs

DTCs If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below. DTCs If the 0.02 inch leak criterion difference between the first and second checks is greater than the specification, the DTCs corresponding to the leak criterion (P043E, P043F, P2401, P2402 and P2419) will be all stored.

Dtc Checkclear

DTC CHECK (NORMAL MODE) NOTICE When the diagnostic system is switched from the normal mode to the check mode, all the DTCs and freeze frame data recorded in the normal mode will be erased. So before switching modes, always check the DTCs and freeze frame data, and note them down. (a) Checking DTCs using the OBD II scan tool or hand-held tester. Connect the OBD II scan tool or hand-held tester to DLC3. Turn the ignition switch to the ON position. Use the OBD II scan tool or hand-held tester to check the DTCs and freeze frame data and note them down (For operating instructions, see the OBD II scan tool's instruction book). See page 05-372 to confirm the details of the DTCs. When simulating symptoms with an OBD II scan tool (excluding hand-held tester) to check the DTCs, use the normal mode. For codes on the DTCs chart subject to 2 trip detection logic, turn the ignition switch off after the symptom is simulated once. Then repeat the simulation process again. When the problem has been...

Connect the terminals to the correct positions to avoid a malfunction

Turn the ignition switch to the ON position, and wait for approximately 60 seconds. c. Read the DTCs. Read the blinking patterns of the DTCs. As examples, the blinking patterns for trouble codes 11 and 31 are shown in the illustration to the left. If DTCs are indicated without connecting the terminals, proceed to the on page DI-1498. 2. CLEAR DTC (Using SST service wire) a. Clear the DTCs. 1. When the ignition switch is turned off, the DTCs are cleared. 2. Using SST, connect terminals TC and CG of the DLC3, and then turn the ignition switch to the ON position.

How To Proceed With Troubleshooting

(a) Use the intelligent tester to check for normal function of the body multiplex communication system. CHECK THE DIAGNOSTIC TROUBLE CODES for diagnostic trouble codes. This is because the system stores past diagnostic trouble codes. Check and clear past diagnostic trouble codes. Check the diagnostic trouble code and inspect the area the code DIAGNOSTIC TROUBLE CODE CHART (a) Find the output code on the diagnostic trouble code chart. RECHECK THE DIAGNOSTIC TROUBLE CODE After deleting the DTC, recheck for diagnostic trouble codes.

Problem Symptoms Table

When a Normal code is output during a DTC check but the problem is still occurring, use the Problem Symptoms Table. The suspected areas (circuits or parts) for each problem symptom are in the table. The suspected areas are listed in order of probability. A description of each of the chart's columns are below. HINT Diagnostic Trouble Code No. and Detection Item Indicates the diagnostic trouble codes, diagnostic trouble code settings and suspected areas for a problem

Confirmation Driving Pattern

(a) Connect the TOYOTA hand-held tester or OBD II scan tool. (c) Use the TOYOTA hand-held tester to set to Check Mode. (See page DI-3) (d) Drive the vehicle several times with the engine speed, load and its surrounding range shown with ENGINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the data list. If you have no TOYOTA hand-held tester, turn the ignition switch OFF after the symptom is simulated the first time. Then repeat the simulation process again.

Inspection Procedure

Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc. at the time of the malfunction.

Exercise extreme care and take precautions at steps f and g below Failure to do so may result in the vehicle

(h) Select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (i) Read DTCs. HINT The voltage output of the throttle position sensor can be checked during step (g) using an intelligent tester. Variations in the voltage output indicate that the throttle actuator is in operation. To check the voltage output using an intelligent tester, select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST PRIMARY THROTTLE POS 1. OK

Read Data List Test Value Of Af Sensor

Connect the intelligent tester to the DLC3. Clear DTCs (see page ES-40). Select the following menu items on the tester DIAGNOSIS ENHANCED OBD II MONITOR INFO MONITOR STATUS. Select the following menu items DIAGNOSIS ENHANCED OBD II MONITOR INFO TEST RESULT RANGE B1S1, then press the ENTER button. Check the test value of the A F sensor output current during fuel-cut.

Exercise extreme care and take precautions in steps f and g below Failure to do so may result in the vehicle

(h) On the tester, select the following menu items DIAGNOSIS ENHANCED OBD II DTC INFO CURRENT CODES. (i) Read the DTCs. HINT The output voltage of the throttle position sensor can be checked during step (g) using the intelligent tester. Variations in the output voltage indicate that the throttle actuator is in operation. To check the output voltage using the intelligent tester, select the following menu items DIAGNOSIS ENHANCED OBD II DATA LIST ETCS THROTTLE POS 1. OK

NOTE This test should always be performed with at least people

Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. c. Turn the intelligent tester ON. d. Clear the DTC (See DTC CHECK CLEAR ). e. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST. While driving, the shift position can be forcibly changed with the intelligent tester. While driving, the shift position can be forcibly changed with the intelligent tester. The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the intelligent tester.

Result Reference iDisplay DTC output Proceed tol

P0781 and other DTCs If any other codes besides P0781 are output, perform troubleshooting for those DTCs first. B GO TO DTC CHART A GO TO NEXT STEP. 2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. c. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. e. Turn the intelligent tester ON. f. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST. g. Perform the ACTIVE TEST using the intelligent tester. While driving, the shift position can be forcibly changed with the intelligent tester. The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the intelligent tester.

Toyota Sequoia Limited

P0781 and other DTCs B HINT If any other codes besides P0781 are output, perform troubleshooting for those DTCs first. B GO TO DTC CHART A GO TO NEXT STEP. 2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. c. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. e. Turn the intelligent tester ON. f. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST. g. Perform the ACTIVE TEST using the intelligent tester. While driving, the shift position can be forcibly changed with the intelligent tester. Comparing the shift position commanded by the ACTIVE The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the intelligent tester. OK Gear position changes in accordance with the tester command. NG REPAIR OR REPLACE...

Slu Pressure Specifications

Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. 3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. 5. Turn the intelligent tester ON. 6. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST.

A part is faulty or not

Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. 5. Turn the intelligent tester ON. 6. Enter the following menus DIAGNOSIS ENHANCED OBD II DATA LIST. When DTC P0712 is output and the intelligent tester output is 150 C (302 F) or more, there is a short circuit. When DTC P0713 is output and the intelligent tester output is -40 C (-40 F), there is an open circuit. Measure the resistance between terminal THO1 (OT) and the body ground.

Turbine Speedoutput Speed Reference

Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. 3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. 5. Turn the intelligent tester ON. 6. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST. While driving, the shift position can be forcibly changed with the intelligent tester.

Typical Malfunction Thresholds

Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. 3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. 5. Turn the intelligent tester ON. 6. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST. While driving, the shift position can be forcibly changed with the intelligent tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See DATA LIST ACTIVE TEST ). The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the intelligent tester.

Onvehicle Inspection

Connect the intelligent tester to the DLC3. Turn the ignition switch ON. Turn the intelligent tester ON. Select the menu items DIAGNOSIS ENHANCED OBD II DATA LIST ALL ACCEL POS 1, ACCEL POS 2. Operate the accelerator pedal, and then check that the ACCEL POS 1 and ACCEL POS 2 values are within the specifications. Standard voltage (ACCEL POS 1)

Values Do not depend solely on these reference values when deciding whether a part is faulty or not

Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. 5. Turn the intelligent tester ON. 6. Enter the following menus DIAGNOSIS ENHANCED OBD II DATA LIST. When DTC P2742 is output and the intelligent tester output is 150 C (302 F) or more, there is a short circuit. When DTC P2743 is output and the intelligent tester output is -40 C (-40 F), there is an open circuit. Measure the resistance between terminal THO2 (OT2) and the body ground.

Reference values Do not depend solely on these reference values when deciding whether a part is faulty or not

Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. e. Turn the intelligent tester ON. f. Enter the following menus DIAGNOSIS ENHANCED OBD II DATA LIST. When shift lever position displayed on intelligent tester differs from actual position, adjustment of PNP switch or shift cable may be incorrect. HINT When shift lever position displayed on intelligent tester differs from actual position, adjustment of PNP switch or shift cable may be incorrect. HINT

Perform the test with the AC OFF

Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. b. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. e. Turn the intelligent tester ON. f. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST.

Perform Active Test

Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed during the ACTIVE TEST. c. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. e. Turn the intelligent tester ON. f. Enter the following menus DIAGNOSIS ENHANCED OBD II ACTIVE TEST.

Read Value Of Data List Skid Control Sensor

(a) Connect the intelligent tester to the DLC3. (d) Select the following menu items DIAGNOSIS OBD MOBD select vehicle ABS DATA LIST. (e) Select the item RR (RL) WHEEL SPD in the DATA LIST and read the value displayed on the intelligent tester. (f) Check that there is no significant difference between the speed value displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle. OK

Diagnosis System Check

The vehicle's ECM uses ISO 14230 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 14230 format. Fig. 39 Identifying DLC3 Connector Fig. 39 Identifying DLC3 Connector If the display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the OBD II scan tool or intelligent tester to the DLC3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or tool side. If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.

Checking Monitor Status

The purpose of the monitor result (mode 06) is to allow access to the results of on-board diagnostic monitoring tests of specific components systems that are not continuously monitored. Examples are catalysts and evaporative emissions (EVAP). The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor. Perform the following instructions to view the monitor status. Although this instruction refers to the Lexus Toyota diagnostic tester, it can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedural information.

Closed Loop Control System Functional Checks

Remember, the engine (and engine control system) must meet certain conditions prior to checking the 02S signal or your results may be inaccurate. This usually means that the engine and 02 sensor must reach operating temperature, the feedback system is in closed loop, and engine speed is maintained at a specified rpm. 02S signal checks can be performed on OBD OBD-II vehicles by using the Diagnostic Tester. Older vehicles may require you to backprobe the 02S signal wire using the Autoprobe or digital multimeter.

Repair Or Replace Air Induction System

The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components systems that are not continuously monitored. Examples are catalyst, evaporative emission (EVAP) and thermostat. The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor. When the test value is not between the minimum test limit and maximum test limit, the ECM (PCM) interprets this as a malfunction. When the component is not malfunctioning, if the difference of the test value and test limit is very small, the component will malfunction in the near future. Perform the following instruction to view the monitor status. Although this instruction reference the Lexus Toyota diagnostic tester, it can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific...

Learned Voltage Feedback and Target Air Fuel Ratio

Although Long FT, Target A F, and LVF (Learned Voltage Feedback) are essentially the same, there is a difference in how this data parameter is displayed on OBD engines. LVF and Target A F are displayed as a voltage signal with a range of 0 to 5 volts. The signal, which varies in fixed 1.25 volt increments, has a nominal value of 2.50 volts.

IAC System Functional Tests

Because functional checks vary between the four major types of IAC systems, refer to the Repair Manual for specific procedures on performing an on-vehicle IAC inspection. On some late model OBD-II vehicles, an active test feature will allow you to manually command IACV positioning from fully open to fully closed. A quick check can be made by commanding a change to IACV positioning while watching for expected changes to idle rpm.

Incorrect Injection Duration

OBD (w o serial data) OBD (with serial data) OBD-II 1. OBD vehicles without serial data Use a voltmeter on terminal VF1 at DLC 1 (check connector) 2. OBD vehicles with serial data Use a scan tool to monitor Target A F data 3. OBD-II vehicles Use a scan tool to monitor Fuel Trim data

TWC Efficiency Quick Check CA Vehicles

On CA vehicles equipped with sub-O2 sensors, a quick check of TWC operation can be made by comparing the signal activity of the main oxygen sensor with the sub-oxygen sensor. Since the main O2S in located upstream of the converter and the sub-O2S is located downstream, a signal comparison would indicate whether a catalytic reaction is taking place inside the converter. If the catalyst is operating, the main O2S signal should normally toggle rich lean, while the sub-O2 sensor should react very slowly (similar to a bad main O2S signal.) Main and sub O2S signals can be observed using the graphing display of the Diagnostic Tester (OBD-II) or V-BoB on other models.

OK Standard value to kg to lb NG Go to step Ok Go To Next Step

Clear the DTCs stored in memory (See DTC CHECK CLEAR ). HINT First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor assembly. e. Using the intelligent tester, check the DTCs of the occupant classification ECU (See DTC CHECK CLEAR ).

Ng Replace Spiral Cable

The P squib circuit consists of the center airbag sensor assembly and the front passenger airbag assembly. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the P squib circuit. DIAGNOSTIC TROUBLE CODE CHART

Inspection Procedure Notice

READ VALUE OF INTELLIGENT TESTER (MASTER CYLINDER PRESSURE SENSOR) (a) Connect the intelligent tester to the DLC3. (c) Select DATA LIST on the intelligent tester. (d) Check that the brake fluid pressure value of the master cylinder pressure sensor observed on the intelligent tester changes when the brake pedal is depressed. OK When the pedal is depressed, voltage displayed on the intelligent tester increases. READ VALUE OF INTELLIGENT TESTER (STOP LIGHT SWITCH OPERATION) (a) Connect the intelligent tester to the DLC3. (c) Select DATA LIST on the intelligent tester. (d) Check that the stop light observed on the intelligent tester changes when the brake pedal is depressed. When the brake pedal is depressed, the intelligent tester displays ON. These DTCs may be restored due to a malfunction in the connector terminal connection, etc.

Check Center Airbag Sensor Assembly

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Turn the ignition switch to the ON position, and wait for at least 60 seconds. Clear the DTCs stored in memory (See DTC CHECK CLEAR ). Turn the ignition switch to the LOCK position. Turn the ignition switch to the ON position, and wait for at least 60 seconds. Check the DTCs (See DTC CHECK CLEAR ).

Troubleshooting Remarks

(a) DTCs for the CAN communication system can be checked using the intelligent tester via the CAN VIM. The DLC3 is connected to the CAN communication system, but no DTCs exist regarding problems in the DLC3 or the DLC3 branch wires. If there is trouble in the DLC3 or the DLC3 branch wires, ECUs on the CAN network cannot output codes to the intelligent tester via the CAN VIM. (b) Trouble in the CAN buses (communication lines) can be checked by measuring the resistance between terminals of the DLC3. However, an open circuit in a branch wire other than the DLC3 branch wires cannot be checked from the DLC3. NOTICE

Check For Intermittent Problems

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic. 1. Clear the DTCs (see page ES-35). 2. Switch the ECM from normal mode to check mode using the intelligent tester (see page ES-38).

Next End Check For Intermittent Problems

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic. 1. Clear the DTCs (See DTC CHECK CLEAR ). 2. Switch the ECM from normal mode to check mode using the intelligent tester (See CHECK MODE PROCEDURE ).

Go To Supplemental Restraint System

(a) Connect the intelligent tester to the DLC3. No occupant classification system DTCs are output Occupant classification system DTCs are output READ VALUE OF INTELLIGENT TESTER (FRONT DOOR COURTESY SWITCH (DRIVER SIDE)) (a) Connect the intelligent tester to the DLC3. (c) Select the item below from the Data List, and read the value displayed on the intelligent tester.

Check Abs Warning Light

Connect the intelligent tester to the DLC3. b. Turn the ignition switch to the ON position and intelligent tester main switch ON. c. Select the ACTIVE TEST mode on the intelligent tester. d. Check that ON and OFF of the ABS warning light can be shown on the combination meter with the intelligent tester. a. Check DTC (See DTC CHECK CLEAR ). B REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A GO TO Next Step

Typical Enabling Conditions

Monitor runs whenever following DTCs not present Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

Monitor Drive Pattern

(a) Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions. (The DTCs may not be detected due the actual driving conditions. And some codes may not be detected through this drive pattern.) HINT The monitor status can be checked using the OBD II scan tool or intelligent tester. When using the intelligent tester, monitor status can be found in the ENHANCED OBD II DATA LIST or under CARB OBD II.

Before releasing the parking brake lever set chocks to hold the vehicle for safety

If the warning lights do not illuminate, confirm whether the bulbs have burned out, and also check for CAN communication system DTCs, since the skid control ECU and combination meter are connected by the CAN communication line. If the warning light remains on, perform the relevant troubleshooting procedures. The relevant troubleshooting procedures are described in the sections listed in the table below.

Monitor Description

These DTCs are output when there is an open or short in the A F sensor circuit, or if A F sensor output drops. To detect these problems, the voltage of the A F sensor is monitored when turn the ignition switch to the ON position, and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the A F sensor is between 0.6V and 4.5V, it is considered normal. If the voltage is out of the specified range, or the admittance is less than the standard value, the ECM will determine that there is a malfunction in the A F sensor. If the same malfunction is detected in next driving cycle, the MIL will be illuminated and a DTC will be stored.

Active Air Fuel Ratio Control

Active air-fuel ratio control is performed for approximately 15 to 20 seconds while driving with a warm engine. During active air-fuel ratio control, the air-fuel ratio is forcibly regulated to become lean or rich by the ECM. If the ECM detects a malfunction, one of the following DTCs is set DTC P0136 (abnormal voltage output), P0137 (open circuit) and P0138 (short circuit). Abnormal Voltage Output of HO2 Sensor (DTC P0136)

Press the TUNE switch to display System Check Result SyS and Diagnosis Memory Response COdE

(e) Clearing Individual DTC Memory (when clearing the memory of DTC detected in the pest individually) Beep sound is given once when the DTC memory is completely cleared. When DTC memory is cleared, only the component code (physical address) is displayed for the target component. (f) Clearance of all DTC memory (when clearing all the memory of DTC detected in the past) Beep sound is given once when the DTC memory is completely cleared. When DTC memory for all the device is cleared, only the component codes (physical address) are displayed.

Do not start the engine

(h) Select the ACTIVE TEST mode on the TOYOTA handheld tester. (i) Please refer to the TOYOTA hand-held tester operator's manual for further details. (j) If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector (See page SF-6 ).

Do not rotate the fuel pipe when tightening the flare nut Torque Nm kgfcm ftlbf

(2) Connect the TOYOTA hand- held tester to the DLC3. (3) Turn the ignition switch ON and TOYOTA handheld tester main switch ON. (4) Select the active test mode on the TOYOTA handheld tester. (5) Please refer to the TOYOTA hand-held tester operator's manual for further details. If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector (See page MF-5 ). (9) Disconnct the TOYOTA hand-held tester from the DLC3.

Check the air in fluid

Connect the TOYOTA hand-held tester to the DLC3. b. Turn the ignition switch ON, and push the TOYOTA hand-held tester main switch ON. c. Select the DATALIST mode on the TOYOTA hand-held tester. Check that the brake fluid pressure value of the master cylinder pressure sensor displayed on the TOYOTA hand-held tester is changing when depressing the brake pedal.

Dtc B B Left Front Air Bag Sensor Malfunction

Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Connect air bag sensor assembly connector A20 (center connector). Reconnect left front air bag sensor. Connect negative battery cable. Wait at least 20 seconds. Turn ignition switch to ON position. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve codes. See RETRIEVING CODES under DIAGNOSTICS. If DTC 16 B1158 or B1159 is displayed, replace air bag sensor assembly. If DTC 16 B1158 or B1159 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT under DIAGNOSTIC TESTS.

Dtc B Front Occupant Classification Sensor Lh Circuit Malfunction Description

DTC B1780 is recorded when a malfunction is detected in the occupant classification sensor front LH circuit. DIAGNOSTIC TROUBLE CODE CHART When DTC B1650 32 is detected as a result of troubleshooting for the supplemental restraint system, check the DTCs stored in the occupant classification ECU. When DTC B1780 is output, perform troubleshooting for the DTC.

Dtc B Rear Occupant Classification Sensor Lh Collision Detection Description

Therefore, if DTC B1787 is output, first perform Zero point calibration and Sensitivity check. DIAGNOSTIC TROUBLE CODE CHART Therefore, if DTC B1787 is output, first perform Zero point calibration and Sensitivity check. DIAGNOSTIC TROUBLE CODE CHART When DTC B1650 32 is detected as a result of troubleshooting for the supplemental restraint system, check the DTCs stored in the occupant classification ECU. When DTC B1787 is output, perform troubleshooting for the DTC.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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