C1905

C1905, C1908, C1922, C1925, C1928 RAS CONTROL UNIT

Description

- RAS actuator and the power steering solenoid valve is controlled by each sensor signal.
- The fail-safe function stops the rear wheel angle function, when the electric components and the mechanical components are malfunctioning.
- The protective function stops RAS system temporarily when the input signal is not inputted to RAS control unit (When battery-power dose not work temporarily).


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


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 "C1905", "C1908", "C1922", "C1925", "C1928" or "RAS warning lamp flickering pattern:11" 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.
Without CONSULT
1.Start the engine.
2.Perform the self-diagnosis. Diagnosis Description.
Is DTC "C1905", "C1908", "C1922", "C1925", "C1928" or "RAS warning lamp flickering pattern:11" detected?
YES- Replace RAS control unit. RAS Control Unit.
NO- GO TO 2.

2. CHECK INFORMATION

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 each harness connector pin terminal for 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".