Dtc Vehicle Can Communication Malfunction Description

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.

DTC TROUBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

65

Any of the following 1. through 3. is detected when IG1 voltage is 8.5 V or more and vehicle speed exceeds by 9 mph (15 km/h) or more.

1. Condition that signal cannot be received from ECM at least once within 5 sec. occurs 10 times or more within 60 seconds.

2. Signal cannot be received continuously for 2 sec. or more.

3. Condition that signal cannot be sent to ECM at least once within 5 sec. occurs 10 times or more within 60 seconds.

• ENG+, ENG- circuit (CAN communication system)

• Translate ECU

• Suspension control ECU

WIRING DIAGRAM

WIRING DIAGRAM

2007 BRAKES Brake Control - Sequoia

Air Conditioning Inspection Checklist
Fig. 29: Vehicle CAN Communication Malfunction - Wiring Diagram INSPECTION PROCEDURE

1. CHECK DTC

a. Check skid control ECU DTC.

RESULT:

RESULT

DTC is not output

A

DTC is output

B

2007 BRAKES Brake Control - Sequoia

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: GO TO Next Step

2. CHECK HARNESS OR CONNECTOR (TRANSLATE ECU - BODY GROUND)

a. Disconnect the translate ECU connector.

b. Measure the resistance between the GND terminal and body ground. OK: Continuity

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 30: Disconnecting Translate ECU Connector OK: GO TO Next Step

3. REPLACE TRANSLATE ECU

a. Clear the translate DTC (See DTC CHECK / CLEAR ).

b. Turn the ignition switch OFF.

c. Turn the ignition switch to the ON position, and check if the same DTC is stored in the memory.

RESULT: RESULT

DTC 65 is not output A

DTC 65 is output

B: CHECK CAN COMMUNICATION SYSTEM A: END

DTC 94 VEHICLE CAN COMMUNICATION MALFUNCTION 2 DESCRIPTION

2007 BRAKES Brake Control - Sequoia

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 CAN communication system.

This DTC is output when the ECM and translate ECU cannot communicate with each other.

DTC TROUBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

94

When each of the following 1 or 2 Is detected at IG1 voltage of 8.5 V or more.

1. Communication error because of noise.

2. Data sending error after writing to output device for 5 sec. or more.

• ENG+, ENG- circuit (CAN communication system)

• Translate ECU

• Suspension control ECU

WIRING DIAGRAM

WIRING DIAGRAM

2007 BRAKES Brake Control - Sequoia

Toyota Vgrs Ecu Malfunction
Fig. 31: Vehicle CAN Communication Malfunction2 - Wiring Diagram INSPECTION PROCEDURE

1. CHECK DTC

a. Check skid control ECU DTC.

RESULT: RESULT

DTC is not output A

2007 BRAKES Brake Control - Sequoia

B: REPAIR CIRCUIT OPENING RELAY A: GO TO Next Step

2. CHECK HARNESS AND CONNECTOR (TRANSLATE ECU - BODY GROUND)

a. Disconnect the translate ECU connector.

b. Measure the resistance between the GND terminal and body ground. OK: Continuity

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 32: Disconnecting Translate ECU Connector OK: GO TO Next Step

3. REPLACE TRANSLATE ECU

a. Clear the translate DTC (See DTC CHECK / CLEAR ).

b. Turn the ignition switch OFF.

c. Turn the ignition switch to the ON position, and check if the same DTC is stored in the memory.

RESULT: RESULT

DTC 94 is not output A

DTC 94 is output

B: CHECK CAN COMMUNICATION SYSTEM A: END

DTC ALWAYS ON MALFUNCTION IN ABS ECU

*: ABS warning light

2007 BRAKES Brake Control - Sequoia

When reading DTCs by SST (CHECK WIRE), if the ABS warning light remains ON, troubleshoot by following the inspection flow.

DESCRIPTION

DTC TROUBLE DETECTION CONDITION

DESCRIPTION

DTC TROUBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

Always ON

When any of the following conditions are detected:

1. Malfunction in ECU internal circuit is identified.

2. ECU power source voltage is too high.

• Charging system

• Power source circuit

• ABS warning light circuit

• Skid control ECU

HINT:

HINT:

There is a possibility that the intelligent tester cannot be used when the ECU is abnormal. WIRING DIAGRAM

2007 BRAKES Brake Control - Sequoia

Starlet Wiring
Fig. 33: Malfunction In ABS ECU - Wiring Diagram INSPECTION PROCEDURE

1. CHECK DTC

RESULT:

2007 BRAKES Brake Control - Sequoia

RESULT

Result

Proceed to

DTC is not output

A

DTC is output

B

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: GO TO Next Step

2. CHECK SKID CONTROL ECU CONNECTOR SECURELY CONNECTED NG: CONNECT CONNECTOR CORRECTLY

OK: GO TO Next Step

3. CHECK TERMINAL VOLTAGE (SKID CONTROL ECU)

a. Disconnect the skid control ECU connector.

b. Turn the ignition switch to the ON position.

c. Measure the voltage between terminals IG1 and GND of the skid control ECU harness side connector.

Voltage: 10 to 14 V

NG: CHECK HARNESS OR CONNECTOR (ECU-IG FUSE - SKID CONTROL ECU)

Fig. 34: Measuring Voltage Between Terminals IG1 And GND Of Skid Control ECU Harness Side Connector

OK: GO TO Next Step

4. CHECK BATTERY VOLTAGE

a. Check the battery positive voltage.

Voltage: 10 to 14 V NG: CHECK CHARGING SYSTEM OK: GO TO Next Step

5. CHECK TC TERMINAL CIRCUIT OK: TC terminal circuit is normal

NG: REPAIR TC TERMINAL CIRCUIT OK: GO TO Next Step

6. CHECK ABS WARNING LIGHT

a. When using the intelligent tester:

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to the ON position and push the intelligent tester main switch ON.

3. Select ACTIVE TEST mode on the intelligent tester.

4. Check that "ON" and "OFF" of the ABS warning light can be shown on the combination meter by the intelligent tester.

VEHICLE CONDITION / TEST DETAILS

Item

Vehicle Condition / Test Details

Diagnostic Note

ABS WARN LIGHT

Turns ABS warning light ON / OFF

Observe combination meter

OK: ABS warning light operates.

b. When not using the intelligent tester:

1. Turn the ignition switch OFF.

2. Disconnect the connector from the skid control ECU.

3. Turn the ignition switch to the ON position.

4. Check the ABS warning light comes on.

OK: ABS warning light comes on. OK: REPLACE SKID CONTROL ECU NG: GO TO Next Step

7. CHECK COMBINATION METER

a. Perform combination meter troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

2007 BRAKES Brake Control - Sequoia

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