Brake ECU Communication

U0129 BRAKE ECU COMMUNICATION

Description
EPS control unit receive information from brake ECU for optimum control of the EPS system with the CAN communication line between EPS control unit and brake ECU.

DTC Logic

DTC DETECTION LOGIC

U0129:

DTC CONFIRMATION PROCEDURE

1. ERASE DTC MEMORY

With CONSULT-III
1. Record DTC.
2. Erase DTC once.

NOTE: After erasing DTC record, currently occurred DTC can be detected by reading out DTC again.

>> GO TO 2.

2. PERFORM DTC CONFIRMATION

With CONSULT-III
1. Turn the ignition switch ON (READY).
2. Drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Perform the self-diagnosis.
Is DTC "U0129" detected?
YES >> Proceed to STC-39, "Diagnosis Procedure".
NO >> INSPECTION END

Diagnosis Procedure
Proceed to LAN-16, "Trouble Diagnosis Flow Chart". Diagnosis and Repair Workflow

Special Repair Requirement

1. INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN
Always perform EPS motor angle sensor initialization and torque sensor calibration after replacing EPS control unit or steering gear assembly. Refer to STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION: Special Repair Requirement". EPS Motor Angle Sensor Initialization and Torque Sensor Calibration
>> END