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. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. DTC REPRODUCTION PROCEDURE

With CONSULT
1.Turn the ignition switch from OFF to ON.
2.Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Without CONSULT
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. .
NO- INSPECTION END


Diagnosis Procedure


1. PERFORM SELF-DIAGNOSIS

With CONSULT
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
Perform "ABS" self-diagnosis.
Is DTC except "DTC related to a malfunction of RAS control unit" detected?
YES- Check the DTC. A L L Diagnostic Trouble Codes ( DTC ).
NO- GO TO 3.

3. PERFORM RAS CONTROL UNIT SELF-DIAGNOSIS

With CONSULT
Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Is DTC except "C1929" detected?
YES- Check the DTC. A L L Diagnostic Trouble Codes ( DTC ).
NO- GO TO 4.

4. INFORMATION CHECK

With CONSULT
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".