4WAS Communication Circuit

U1010 4WAS COMMUNICATION CIRCUIT





Description
- 4WAS front control unit and 4WAS main control unit transmit/receive information to/from each other for optimum control of the 4WAS system with the specified 4WAS system line (4WAS communication line) between
4WAS front control unit and 4WAS main control unit.
- Be careful to repair wirings because 4WAS system specified line adopts twisted-pair wires. Refer to Precautions For Harness Repair.




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 front control unit self-diagnosis.
Is DTC "U1010" detected?
YES - Proceed to diagnosis procedure. Refer to 4WAS Communication Circuit.
NO - INSPECTION END




Diagnosis Procedure
1. 4WAS FRONT CONTROL UNIT
Check that there is no malfunction in 4WAS front control unit harness connector or disconnection.
Is the inspection result normal?
YES - Replace 4WAS front control unit. Refer to Exploded View.
NO - Repair or replace the harnesses and connectors. Refer to Precautions For Harness Repair.




Special Repair Requirement

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

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

AFTER REPLACING 4WAS FRONT CONTROL UNIT
- Perform 4WAS front actuator adjustment after replacing 4WAS front control unit. Refer to Special Repair Requirement (Pattern 2) Special Repair Requirement (Pattern 3), "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 3)".