Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE
1. Check if the ECU-B and ECU-ACC fuses are normal.
  NG: REPLACE FUSE
  
  OK: Go to next step.
INSPECT OUTER MIRROR SWITCH ASSY
1. Remove the outer mirror switch assy.
2. Left side for left/right adjustment switch: Inspect the left side mirror switch continuity.
  Standard
  
  Fig 1: Left Outer Mirror Switch Continuity Specification Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the continuity is not as specified, replace the switch,
3. Right side for left/right adjustment switch:
  Inspect the right side mirror switch continuity.
  
  Fig 2: Inspecting Outer Mirror Switch Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard
  
  Fig 3: Right Outer Mirror Switch Continuity Specification Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the continuity is not as specified, replace the switch.
  
  NG: REPLACE OUTER MIRROR SWITCH ASSY
  
  OK: Go to next step.
CHECK WIRE HARNESS (OUTER MIRROR CONTROL ECU - OUTER MIRROR SWITCH)
1. Disconnect the M2 outer mirror switch and M8 outer mirror control ECU connectors.
2. Check the continuity between the disconnected connectors.
  Standard
  
  Fig 5: Wire Harness Continuity Specification Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
  
  OK: REPLACE OUTER MIRROR CONTROL ECU ASSY