Steering Control System With 4WAS

U1000 CAN COMM CIRCUIT





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.
- 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





*: Communication line between 4WAS front control unit and 4WAS main control unit

DTC CONFIRMATION PROCEDURE
1.RECHECK DTC
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform self-diagnosis for "4WAS(MAIN)/RAS/HICAS".
Is DTC "U1000" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULT (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Check the self-diagnostic result.
Is DTC "U1931" detected with "U1000"?
YES - C1931.
NO - Perform CAN diagnosis. Trouble Diagnosis Flow Chart.