With 4WAS

U1010 CONTROL UNIT (CAN)





Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.




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 "U1010" detected?
YES - Proceed to diagnosis procedure. Refer to With 4WAS.
NO - INSPECTION END




Diagnosis Procedure
1. 4WAS MAIN CONTROL UNIT
Check that there is no malfunction in 4WAS main control unit harness connector or disconnection.
Is the inspection result normal?
YES - Replace 4WAS main 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 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".