C1929

C1929 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)





Description
The ABS actuator and electric unit (control unit) and the RAS control unit exchange signals via the CAN communication line.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE

NOTE:
Every time when "C1929" is detected, either the ABS actuator ad electric unit (control unit) or the RAS control unit simultaneously detects a DTC that leads to a direct cause of the malfunction.
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Without CONSULT-III
1. Start the engine.
2. Perform the self-diagnosis. Diagnosis Description.
Is DTC "C1929" or "RAS warning lamp flickering pattern:26" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Is DTC "U1000" or "U1010" detected?
YES - Check the malfunction system.
NO - GO TO 2.
2.PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform "ABS" self-diagnosis.
Is DTC except "DTC related to a malfunction of RAS control unit" detected?
YES - Check the DTC. Testing and Inspection.
NO - GO TO 3.
3.PERFORM RAS CONTROL UNIT SELF-DIAGNOSIS
With CONSULT-III
Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Is DTC except "C1929" detected?
YES - Check the DTC. Testing and Inspection.
NO - GO TO 4.
4.INFORMATION CHECK
With CONSULT-III
1. Select "DATA MONITOR" of "4WAS(MAIN)/RAS/HICAS".
2. Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. With Rear Active Steer.
Is each data the standard value?
YES - Check that there is no malfunction in each harness connector pin terminal or disconnection.
NO - Replace RAS control unit. RAS Control Unit.




Special Repair Requirement

BEFORE REPLACING RAS CONTROL UNIT
- Record the self-diagnosis results (history).

CAUTION:
- Never erase the memory (history) of self-diagnosis results when replacing RAS control unit after diagnosis.
- Erase the memory of the self-diagnosis results (record) after printing out or recording all the values of "DATA MONITOR".