Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure engine starts normally. Repair as required. Test power mirror switch. See POWER MIRROR SWITCH under COMPONENT TESTS under POWER MIRRORS - AVALON article under MIRRORS in ACCESSORIES & EQUIPMENT. If power mirror switch is not okay, replace switch. If power mirror switch is okay, go to next step.
- Turn ignition off. Disconnect power seat ECU 25-pin electrical harness connector P21. See Figure. Remove and disconnect Black power mirror switch 10-pin electrical harness connector R5. See Fig 1. Check and repair connectors and circuits between power seat ECU and power mirror switch. See MEMORY SYSTEMS in SYSTEM WIRING DIAGRAMS article.
- After repairs have been made, perform confirmation test. See CONFIRMATION TEST under SELF-DIAGNOSTIC SYSTEM.