Toyota RAV4 manuals

Toyota Sienna Service Manual: ECM Communication Circuit Malfunction

DTC C1203/53 ECM Communication Circuit 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 through the CAN communication system.

INSPECTION PROCEDURE

1 CHECK PART NUMBER (ECM AND BRAKE ACTUATOR ASSEMBLY)

(a) Check that the proper ECM and brake actuator assembly (skid control ECU) are installed.

OK: Proper ECUs are installed.

REPLACE ECM

Engine Control System Malfunction
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Zero Point Calibration of Yaw Rate Sensor Undone
DESCRIPTION The skid control ECU receives signals from the yaw rate sensor via CAN communication system. Yaw rate sensor has the built-in deceleration sensor. If there is trouble in the b ...

Other materials:

Terminals of ECU
1. MULTIPLEX NETWORK GATEWAY ECU Disconnect the G4 ECU connector. Measure the voltage between the specified terminals on the wire harness side connector. If the result is not as specified, there may be a malfunction on the wire harness side. Measure the resistance between ...

Correct use of the seat belts
Extend the shoulder belt so that it comes fully over the shoulder, but does not come into contact with the neck or slide off the shoulder. Position the lap belt as low as possible over the hips. Adjust the position of the seatback. Sit up straight and well back in the seat. ...

Screen Flicker or Color Distortion
INSPECTION PROCEDURE 1 CHECK DISPLAY SETTING Enter the display adjustment screen by pressing the "DISPLAY" switch.  Reset display settings (contrast, brightness) and check that the screen appears normal Press the "INFO" switch and then select "S ...

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