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Inspection Procedure

  1. CHECK FUSE 
    1. Check if the ECU-B and ECU-ACC fuses are normal.

      NG: REPLACE FUSE 

      OK: Go To Next Step 

  2. 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.
      1. Standard: 
      SWITCH POSITION & TERMINAL SPECIFICATION

      Switch position Terminal No. Specified condition
      OFF - No continuity
      UP R8-3 - R8-4
      R8-7 - R8-8
      Continuity
      DOWN R8-3 - R8-8
      R8-4 - R8-7
      Continuity
      LEFT R8-4 - R8-9
      R8-7 - R8-8
      Continuity
      RIGHT R8-4 - R8-7
      R8-8 - R8-9
      Continuity

      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 1: Identifying Outer Mirror Switch Assy Terminals
      G02938698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Standard: 
      SWITCH POSITION & TERMINAL SPECIFICATION

      Switch position Terminal No. Specified condition
      OFF - No continuity
      UP R8-2 - R8-4
      R8-1 - R8-7 - R8-8
      Continuity
      DOWN R8-4 - R8-7
      R8-1 - R8-2 - R8-8
      Continuity
      LEFT R8-1 - R8-7 - R8-8
      R8-4 - R8-10
      Continuity
      RIGHT R8-4 - R8-7
      R8-1 - R8-8 - R8-10
      Continuity

      If the continuity is not as specified, replace the switch.

      NG: REPLACE OUTER MIRROR SWITCH ASSY 

      OK: Go To Next Step 

  3. CHECK WIRE HARNESS (OUTER MIRROR CONTROL ECU - OUTER MIRROR SWITCH) 
    1. Disconnect the M2 outer mirror switch and R8 outer mirror control ECU connectors.
    2. Check the continuity between the disconnected connectors.
      1. Standard: 
      TERMINAL SPECIFICATION

      Symbols (Terminal No.) (Mirror SW - ECU) Specified condition
      B <=> SWB (R8-4 <=> M2-17) Continuity
      E <=> SWE (R8-8 <=> M2-16) Continuity
      MLV <=> SWLV (R8-3 <=> M2-6) Continuity
      MRV <=> SWRV (R8-2 <=> M2-5) Continuity
      MLH <=> SWLH (R8-9 <=> M2-4) Continuity
      MRH <=> SWRH (R8-10 <=> M2-3) Continuity

    NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

    OK: REPLACE OUTER MIRROR CONTROL ECU ASSY 

    Fig 2: Identifying M2 Outer Mirror Switch & R8 Outer Mirror Control ECU Connectors Terminals
    G02938699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002