Toyota RAV4 manuals

Toyota Sienna Service Manual: Engine Control System Malfunction

DTC C1201/51 Engine Control System Malfunction

DESCRIPTION

If trouble occurs the engine control system, the ECM transmits the abnormality to the skid control ECU.

The skid control ECU set this DTC and the skid control ECU prohibits TRAC and VSC control.

INSPECTION PROCEDURE

1 CHECK ENGINE CONTROL SYSTEM

(a) Check if the normal system code is recorded for engine control system.

Result

REPLACE ECM

Open or Short Circuit in ABS Solenoid Relay Circuit
DESCRIPTION The ABS solenoid relay is built in the brake actuator assembly. This relay supplies power to each ABS solenoid. If the initial check is OK, after the ignition switch is turned to t ...

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 fr ...

Other materials:

Removal
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 2. REMOVE ENGINE UNDER COVER NO.1 3. DRAIN AUTOMATIC TRANSAXLE FLUID (a) Remove the drain plug and gasket, and drain the ATF. (b) Install a new gasket and the drain plug. Torque: 49 N*m (500 kgf*cm, 36 ft.*lbf) 4. REMOVE AUTOMATIC TRANSA ...

Right Front Wheel Speed Sensor Signal
DESCRIPTION The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS control system. The front and rear rotors have 48 serrations each. When the rotors rotate, the magnetic field emitted by the permanent magnet in t ...

Removal
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 2. REMOVE STEERING WHEEL NO. 2 LOWER COVER 3. REMOVE STEERING WHEEL NO. 3 LOWER COVER 4. REMOVE HONE BUTTON ASSEMBLY 5. REMOVE STEERING PAD SWITCH LH  Disconnect the connector. Disconnect the connector of cruise control main swi ...

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