Do not apply heat directly to the parts in the ECU

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D25085

3. WATER SPRINKLING METHOD: When the malfunction seems to occur on a rainy day or in high-humidity.

(a) Sprinkle water onto the vehicle and check if the malfunction occurs. NOTICE:

Never sprinkle water directly into the engine compartment. Indirectly change the temperature and humidity by applying water spray onto the front of the radiator.

Never apply water directly onto the electronic components.

HINT:

If the vehicle has or had a water leakage problem, the leakage may have damaged the ECU or connections. Look for evidence of corrosion or shorts. Proceed with caution during water tests.

4. HIGH ELECTRICAL LOAD METHOD: When a malfunction seems to occur when electrical load is excessive.

(a) Turn on all the electrical loads including the heater blower, headlights, rear window defogger, etc., and check if the malfunction occurs.

DIAGNOSTIC TROUBLE CODE CHART

Use Diagnostic Trouble Codes (DTCs) (from the DTC checks) in the table below to determine the trouble area and proper inspection procedure. The Supplemental Restraint System (SRS) diagnostic trouble code chart is shown below as an example.

Ecu Wiring Toyota Camry

PROBLEM SYMPTOMS TABLE

The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to troubleshoot when, during a DTC check, a "Normal" code is displayed but the problem is still occurring. Numbers in the table show the inspection order in which the circuits or parts should be checked. HINT:

In some cases, the problem is not detected by the diagnostic system even though a problem symptom is present. It is possible that the problem is occurring outside the detection range of the diagnostic system, or that the problem is occurring in a completely different system.

2006 Toyota Camry Ecu

CIRCUIT INSPECTION

How to read and use each page is shown below.

►Circuit Description The major role, operation of the circuit and its component parts are explained.

Diagnostic Trouble Code No. and Detection Item

►Indicates the diagnostic trouble codes, diagnostic trouble code settings and suspect areas for a problem._

►Circuit Description The major role, operation of the circuit and its component parts are explained.

Diagnostic Trouble Code No. and Detection Item

Ikz Ecu Diagnostic Code Diagram

WIRING DIAGRAM

Combination Meter

Junction Connector

Engine ECU

Inspection Procedures Use the inspection procedures to determine if the circuit is normal or abnormal. If it is abnormal, use it to determine whether the problem is located in the sensors, actuators, wire harness or ECU.

WIRING DIAGRAM

Combination Meter

Junction Connector

Engine ECU

#/Viring Diagram This shows a wiring diagram of the circuit. Use this diagram together with ELECTRICAL WIRING DIAGRAM to thoroughly understand the circuit.

Wire colors are indicated by an alphabetical code B = Black, L = Blue, R = Red, BR = Brown, LG = Light Green, V = Violet, G = Green, O = Orange, W = White, GR = Gray, P = Pink, Y = Yellow, SB = Sky Blue The first letter indicates the basic wire color and the second letter indicates the color of the stripe.

DIAGNOSTICS - SFI SYSTEM (1 ZZ-fE )

INSPECTION PROCEDURE y

[ 1 j READ VALUE OF VEHICLE SPEED VALUE(SPEEDOMETER OPERATION)

(a) Select data monitor on the hand-held tester.

(b) Perform a test drive of the vehicle. Read the vehicle speed on the hand-held tester. RESULT: The same as the speed displayed on the speed meter.

| NG > | REPLACE COMBINATION METER ASSY

INSPECT ECU

EQUIPMENT SET

(a) Check the output waveform. HINT:

Using the oscilloscope function of hand-held tester, it is possible to check the function between the engine ECU and the knock control sensor. The waveform shown in the illustration is an example without noise and chattering.

(1) Connect the hand-held tester between the terminals SPD of the engine ECU E7 connector and E1 of the engine ECU E8 connector.

(2) Select the oscilloscope function on the hancMield tester. (Refer to the hand-held tester's instruction book for operating instructions.)

RESULT: Voltage is intermittently generated

EQUIPMENT SET

5V/DIV, 20ms/DIV

Running at 20 km/h

The multitude gets shorter as the engine speed becomes faster.

CHECK AND REPLACE ECU

►Indicates the condition of the connector of the ECU

GND1

djjring the check.

djjring the check.

Connector being checked is connected.

Connections of tester are indicated by (+), (-) after terminals name.

Connector being checked is disconnected.

For inspection of connector with body ground, there is nothing about the body ground written down.

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