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. Precaution For Harness Repair With 4WAS.


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. RECHECK DTC

With CONSULT
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. .
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. Exploded View.
NO- Repair or replace the harnesses and connectors. Precaution For Harness Repair With 4WAS.


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. Special Repair Requirement (Pattern 3).