4WS Indicator Light

Diagnostic Trouble Code (DTC):
- The DTC is memorized when the 4WS control unit detects an abnormality, even if it was a temporary condition. To troubleshoot, ask the customer in detail about the conditions when the 4WS indicator light came on, and try to duplicate those conditions during the test drive. If the 4WS indicator light does not come on during the test drive, do not continue to troubleshoot; the system is OK at this time. The troubleshooting procedures assume that the symptom is occurring. Check for loose connections or poor contacts at the connectors by wiggling the harness, etc.

4WS Indicator:
- The 4WS indicator light comes on when the 4WS control unit detects a problem in the system. Depending on the problem, the 4WS indicator light may be canceled by turning the ignition switch off, or it might require removing the CLOCK, RADIO (10 A) fuse in the under-hood fuse/relay box. If a problem is detected in the main steering angle sensor system, you must remove the CLOCK, RADIO (10 A) fuse to cancel the 4WS indicator light. If a problem is detected in any other part of the system, turning the ignition switch off will cancel the 4WS indicator light.

NOTE: If the 4WS light comes on because of a temporary problem in the main steering angle sensor system, it cannot be canceled by simply removing the cause of the problem and cycling the ignition switch; the CLOCK, RADIO (10 A) fuse must be removed.

- The 4WS indicator light does not come on when the DTC is 71, 72, or 73. However, the 4WS indicator light will flash these codes when the service check connector is jumped.

Temporary Driving conditions:
- When the vehicle is operated under extremely harsh or abnormal conditions, the 4WS control unit interprets it as a problem and memorizes the DTC.

Fail-safe control:
- When the fail-safe conditions are met, the 4WS control unit stops the 4WS control and returns the rear wheels to the straight driving position slowly.