Replace Skid Control Ecu Dtc C Ecm Communication Circuit Malfunction Description

This circuit is used to send TRAC and VSC control information from the skid control ECU to the ECM (CAN communication system) and engine control information from the ECM to the skid control ECU (CAN communication system).

The skid control ECU and ECM are connected to each other via the translate ECU using the CAN communication system.

DTC TRO

UBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

• Skid control ECU

2007 BRAKES Brake Control - Sequoia

• CAN1 communication

r* 1 mi /^i

Data cannot be transmitted and/or received to/from ECM from

system

C1203/53

translate ECU for a fixed time.

• ECM

• Translate ECU

WIRING DIAGRAM

WIRING DIAGRAM

Toyota Majesta Skid Control Ecu Location
Fig. 48: ECM Communication Circuit Malfunction - Wiring Diagram INSPECTION PROCEDURE

1. CHECK ENGINE CONTROL SYSTEM

a. Check engine control system (See DTC CHECK / CLEAR ).

RESULT: RESULT

DTC is not output A

DTC is output

B: REPAIR ENGINE CONTROL SYSTEM

A: GO TO Next Step

2. CHECK DTC (TRANSLATE ECU)

a. Check DTC of the translate ECU (See DTC CHECK / CLEAR ).

RESULT:

2007 BRAKES Brake Control - Sequoia

RESULT

DTC is output (53, 65, 94)

A

DTC is not output

B

3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRANSLATE ECU)

a. Check for open and short circuit in harness and connector between slid control ECU and translate ECU (CAN1 circuit).

NG: REPAIR HARNESS AND CONNECTOR

OK: GO TO Next Step

4. REPLACE TRANSLATE ECU

b. Turn the ignition switch OFF.

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

RESULT:

RESULT

DTC is output

A

DTC is not output

A: REPLACE SKID CONTROL ECU DTC C1223/43 ABS CONTROL SYSTEM MALFUNCTION DESCRIPTION

HINT:

This DTC is output when the VSC system detects a malfunction in the ABS system.

DTC TROUBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

C1223/43

ABS control system is abnormal.

ABS control system

INSPECTION PROCEDURE

1. RECONFIRM DTC

a. Clear the DTC.

b. Turn the ignition switch OFF.

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

RESULT:

RESULT

DTC is output

A

DTC is not output

A: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

DTC C1231/31 STEERING ANGLE SENSOR CIRCUIT MALFUNCTION; DTC C1335/35 STEERING ANGLE SENSOR CIRCUIT

DESCRIPTION

The steering angle sensor signal is sent to the skid control ECU via the CAN communication system.

When there is a malfunction in the communication system, the DTCs will be detected by the diagnosis function.

DTC TRC

>UBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

C1231/31

Data is not transmitted to the steering angle sensor for a fixed time invalid steering angle sensor data.

• Translate ECU

• Steering angle sensor

• Steering angle sensor communication circuit

• Skid control ECU

• CAN communication system

C1335/35

When the +BS terminal voltage is 9.5 V or more, data transmission from the steering angle sensor is impossible for 1 sec. or more.

• Translate ECU

• Steering angle sensor

• Steering angle sensor to translate ECU circuit

• Skid control ECU

• CAN1 communication system

2007 BRAKES Brake Control - Sequoia

WIRING DIAGRAM

WIRING DIAGRAM

Skid Control Ecu Toyota Corolla
Fig. 49: Steering Angle Sensor Circuit Malfunction - Wiring Diagram INSPECTION PROCEDURE

NOTE:

• When replacing the skid control ECU, perform the zero point calibration (See CALIBRATION ).

2007 BRAKES Brake Control - Sequoia

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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