2005 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

Power Mirror Control System: Inspection

  1. INSPECT OUTER MIRROR SWITCH ASSY (w/o RETRACT MIRROR) 
    1. The L side of the left/right adjustment switch:

      Inspect the mirror switch continuity.

      Standard (Left side): 

      Fig 1: Outer Mirror Switch Assy Table
      G02963248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the switch assy.

      Fig 2: Identifying L Side Of Left/Right Adjustment Switch
      G02963249Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. The R side of the left/right adjustment switch:

      Inspect the mirror switch continuity.

      Standard (Right side): 

      Fig 3: Mirror Switch Continuity Table
      G02963250Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the switch assy.

    3. When the left/right adjustment switch is off:

      Inspect the mirror switch continuity.

      Standard (Adjustment switch off): 

      TERMINAL CONDITION SPECIFIED CONDITION

      Terminal No. Switch Position Specified Condition
      7 <=> 8 UP Continuity
      4 <=> 7 DOWN Continuity
      7 <=> 8 LEFT Continuity
      4 <=> 7 RIGHT Continuity

      If the result is not as specified, replace the switch assy.

    4. Inspect operation of the mirror switch illumination.

      Standard: 

      MEASUREMENT CONDITION TABLE

      Measurement Condition Specified Condition
      Battery positive (+) --> ILL+ (5) Illumination light lights up
      Battery negative (-) --> ILL- (6) Illumination light lights up

      If the result is not as specified, replace the switch assy or bulb.

      Fig 4: Applying Battery Voltage To Terminals 5 (ILL+) & 6 (ILL-)
      G02963251Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT OUTER REAR VIEW MIRROR ASSY LH 
    1. Disconnect the mirror connector.
    2. Apply battery voltage and inspect operation of the mirror face, as shown in MEASUREMENT CONDITION TABLE  and Fig 5.

      Standard (LH): 

      MEASUREMENT CONDITION TABLE

      Measurement Condition Mirror Operation
      Battery positive (+) --> MV (7) Battery negative (-) --> M+ (6) Turns upward (A)
      Battery positive (+) --> M+ (6) Battery negative (-) --> MV (7) Turns downward (B)
      Battery positive (+) --> M+ (8) Battery negative (-) --> MH (7) Turns left (C)
      Battery positive (+) --> MH (7) Battery negative (-) --> M+ (8) Turns right (D)

      If the result is not as specified, replace the mirror assy.

      Fig 5: Applying Battery Voltage & Inspect Operation Of Mirror Face (1 Of 4)
      G02963252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT OUTER REAR VIEW MIRROR ASSY LH (W/ SEAT MEMORY SWITCH) 
    1. Disconnect the mirror connector.
    2. Apply battery voltage and inspect operation of the mirror face, as shown in MEASUREMENT CONDITION TABLE  and Fig 6.

      Standard (LH): 

      MEASUREMENT CONDITION TABLE

      Measurement Condition Mirror Operation
      Battery positive (+) --> MV (7) Battery negative (-) --> M+ (6) Turns upward (A)
      Battery positive (+) --> M+ (6) Battery negative (-) --> MV (7) Turns downward (B)
      Battery positive (+) --> M+ (8) Battery negative (-) --> MH (7) Turns left (C)
      Battery positive (+) --> MH (7) Battery negative (-) --> M+ (8) Turns right (D)

      If the result is not as specified, replace the mirror assy.

    3. Inspect operation of the mirror position sensor.
      1. Connect the positive (+) lead from the ohmmeter to terminal 9 and the negative (-) lead to terminal 15, and measure the resistance.

        Standard: 700 - 1300 Ω 

      2. Check that the resistance between terminals 9 and 10 changes when slowly turning the mirror face right and left.
      3. Check that the resistance between terminals 9 and 16 changes when slowly turning the mirror face right and left.
        Fig 6: Applying Battery Voltage & Inspect Operation Of Mirror Face (2 Of 4)
        G02963253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT OUTER REAR VIEW MIRROR ASSY RH 
    1. Disconnect the mirror connector.
    2. Apply battery voltage and inspect operation of the mirror face, as shown in MEASUREMENT CONDITION TABLE  and Fig 7.

      Standard (LH): 

      MEASUREMENT CONDITION TABLE

      Measurement Condition Mirror Operation
      Battery positive (+) --> MV (7) Battery negative (-) --> M+ (6) Turns upward (A)
      Battery positive (+) --> M+ (6) Battery negative (-) --> MV (7) Turns downward (B)
      Battery positive (+) --> M+ (8) Battery negative (-) --> MH (7) Turns left (C)
      Battery positive (+) --> MH (7) Battery negative (-) --> M+ (8) Turns right (D)

      If the result is not as specified, replace the mirror assy.

      Fig 7: Applying Battery Voltage & Inspect Operation Of Mirror Face (3 Of 4)
      G02963254Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT OUTER REAR VIEW MIRROR ASSY RH (W/ SEAT MEMORY SWITCH) 
    1. Disconnect the mirror connector.
    2. Apply battery voltage and inspect operation of the mirror face, as shown in MEASUREMENT CONDITION TABLE  and Fig 8.

      Standard (RH): 

      MEASUREMENT CONDITION TABLE

      Measurement Condition Mirror Operation
      Battery positive (+) --> MV (7) Battery negative (-) --> M+ (6) Turns upward (A)
      Battery positive (+) --> M+ (6) Battery negative (-) --> MV (7) Turns downward (B)
      Battery positive (+) --> M+ (8) Battery negative (-) --> MH (7) Turns left (C)
      Battery positive (+) --> MH (7) Battery negative (-) --> M+ (8) Turns right (D)

      If the result is not as specified, replace the mirror assy.

    3. Inspect operation of the mirror position sensor.
      1. Connect the positive (+) lead from the ohmmeter to terminal 9 and the negative (-) lead to terminal 15, and measure the resistance.

        Standard: 700 - 1300 Ω 

      2. Check that the resistance between terminals 9 and 10 changes when slowly turning the mirror face right and left.
      3. Check that the resistance between terminals 9 and 16 changes when slowly turning the mirror face right and left.
        Fig 8: Applying Battery Voltage & Inspect Operation Of Mirror Face (4 Of 4)
        G02963255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT SEAT MEMORY SWITCH (W/ SEAT MEMORY SWITCH) 
    1. Inspect the seat memory switch continuity.

      Standard: 

      TERMINAL CONDITION SPECIFIED CONDITION

      Terminal No. Switch Position Specified Condition
      1 <=> 2 SET Switch ON Continuity
      2 <=> 3 SW1 Switch ON Continuity
      2 <=> 4 SW2 Switch ON Continuity

      If the result is not as specified, replace the switch assy.

      Fig 9: Inspecting Seat Memory Switch (With Seat Memory Switch)
      G02963256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT OUTER MIRROR CONTROL ECU ASSY 
    1. Disconnect the connector from the mirror control ECU assy.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

      TERMINAL CONDITION SPECIFIED CONDITION

      Terminal No. Switch Position Specified Condition
      1 <=> Body ground Constant 10 - 14 V
      2 <=> Body ground Ignition switch OFF --> ACC 0V --> 10 - 14 V
      14 <=> Body ground Constant Continuity
      15 <=> Body ground Shift position P --> R 0V --> 10 - 14 V
      Fig 10: Identifying Outer Mirror Control ECU Assy
      G02963257Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Connect the connector to the mirror control ECU assy.
    4. Check the voltage or continuity of each terminal of the wire harness side connector.
      Fig 11: Connecting Connector To Mirror Control ECU Assy
      G02963258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    TERMINAL CONDITION SPECIFIED CONDITION

    Terminal No. Switch Position Specified Condition
    10 <=> Body ground Ignition switch ACC, Left/right adjustment switch L side, Mirror switch OFF --> RIGHT or DOWN 0 V --> 8 V or more
    11 <=> Body ground Ignition switch ACC, Left/right adjustment switch L side, Mirror switch OFF --> LEFT 0 V --> 8 V or more
    12 <=> Body ground Ignition switch ACC, Left/right adjustment switch L side, Mirror switch OFF --> UP 0 V --> 8 V or more
    22 <=> Body ground Ignition switch ACC, Left/right adjustment switch R side, Mirror switch OFF --> RIGHT or DOWN 0 V --> 8 V or more
    23 <=> Body ground Ignition switch ACC, Left/right adjustment switch R side, Mirror switch OFF --> LEFT 0 V --> 8 V or more
    24 <=> Body ground Ignition switch ACC, Left/right adjustment switch R side, Mirror switch OFF --> UP 0 V --> 8 V or more

    If the result is not as specified, replace the mirror assy.

    Standard: 

    TERMINAL CONDITION SPECIFIED CONDITION

    Terminal No. Switch Position Specified Condition
    8 <=> Body ground Ignition switch ACC, Left/right adjustment switch L side, Mirror switch innermost --> Outermost Approx. 4 V --> 0.23 V
    9 <=> Body ground Ignition switch ACC, Left/right adjustment switch L side, Mirror switch uppermost --> Lowermost Approx. 3.7 V --> 0.27 V
    20 <=> Body ground Ignition switch ACC, Left/right adjustment switch L side, Mirror switch innermost --> Outermost Approx. 4 V --> 0.23 V
    21 <=> Body ground Ignition switch ACC, Left/right adjustment switch R side, Mirror switch uppermost --> Lowermost Approx. 3.7 V --> 0.27 V
    TERMINAL CONDITION SPECIFIED CONDITION

    Terminal No. Switch Position Specified Condition
    13 <=> Body ground Ignition switch OFF, All lights OFF, All doors closed and left untouched for 30 sec. or more --> Any door open No Hz output (0 Hz) --> Hz output
    25 <=> Body ground Ignition switch OFF, All lights OFF, All doors closed and left untouched for 30 sec. or more --> Any door open No Hz output (0 Hz) --> Hz output

    If the result is not as specified, replace the mirror assy or the multiplex control may malfunction.

    Standard: 

    TERMINAL CONDITION SPECIFIED CONDITION

    Terminal No. Switch Position Specified Condition
    7 <=> Body ground Ignition switch OFF --> ACC 0 V --> 5 V

    If the result is not as specified, replace the mirror control ECU assy .

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