C1907

C1900, C1901, C1906, C1907, C1927, C1933 4WAS MAIN CONTROL UNIT





Description
- 4WAS rear actuator and the power steering solenoid valve is controlled by each sensor signal.
- The fail-safe functions stops the rear wheel angle function (the front wheel is the steering wheel cutting angle) when the electric components and the mechanical components are malfunctioning.
- The protective function stops 4WAS system temporarily when the input signal is not inputted to 4WAS main control unit (When battery-power dose not work temporarily).
- 4WAS front control unit and 4WAS main control unit perform two-way transmitting/receiving signals for optimal control of 4WAS system via 4WAS communication line.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.RECHECK DTC
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform 4WAS main control unit self-diagnosis.
Is DTC "C1900", "C1901", "C1906", "C1907", "C1927" or "C1933" detected?
YES - Proceed to diagnosis procedure. Refer to C1900.
NO - INSPECTION END




Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is any DTC "C1900", "C1901", "C1906", "C1907", "C1927" or "C1933" detected?
YES - Replace 4WAS main control unit. Refer to Exploded View.
NO - GO TO 2.
2.CHECK INFORMATION
With CONSULT-III
Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. Refer to 4WAS Main Control Unit.
Is each data the standard value?
YES - Check each harness connector pin terminal for disconnection.
NO - Replace 4WAS main control unit. Refer to Exploded View.




Special Repair Requirement

BEFORE REPLACING 4WAS MAIN CONTROL UNIT
- Record the self-diagnosis results (history).

CAUTION:
- Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit after diagnosis.
- Erase the memory of the self-diagnosis results (record) after printing out or recording all the values of "DATA MONITOR".