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Section 392 (Power Mirror Control System): Inspection

WARNING: This page is about a different car, the 2004 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  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): 

      MIRROR SWITCH CONTINUITY

      Terminal No. Switch Position Specified Condition
      - OFF No continuity
      1 <=> 8 UP Continuity
      3 <=> 4
      7 <=> 8
      1 <=> 8 DOWN Continuity
      3 <=> 8
      4 <=> 7
      1<=> 8 LEFT Continuity
      4 <=> 9
      7 <=> 8
      1 <=> 8 RIGHT Continuity
      4 <=> 7
      8 <=> 9
      Fig 1: Inspecting Outer Mirror Switch Assy
      G03476543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    2. The R side of the left/right adjustment switch:

      Inspect the mirror switch continuity.

      Standard (Right side): 

      MIRROR SWITCH CONTINUITY

      Terminal No. Switch Position Specified Condition
      - OFF No continuity
      1 <=> 8 UP Continuity
      2 <=> 4
      7 <=> 8
      1 <=> 8 DOWN Continuity
      2 <=> 8
      4 <=> 7
      1 <=> 8 LEFT Continuity
      7 <=> 8
      4 <=> 10
      1 <=> 8 RIGHT Continuity
      4 <=> 7
      8 <=> 10

      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): 

      MIRROR SWITCH CONTINUITY

      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: 

    MIRROR SWITCH OPERATION

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

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

    Fig 2: Inspecting Operation Of Mirror Switch
    G03476544Courtesy 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 the table and illustration.

    Standard (LH): 

    MIRROR OPERATION

    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 3: Inspecting Operation Of Mirror Face
    G03476545Courtesy 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 the table and illustration.

      Standard (LH): 

      MIRROR OPERATION

      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.
        Fig 4: Inspecting Operation Of Mirror Position Sensor
        G03476546Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        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.
  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 the table and illustration.

    Standard (RH): 

    MIRROR OPERATION

    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: Disconnecting The Mirror Connector
    G03476547Courtesy 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 the table and illustration.

      Standard (RH): 

      MIRROR OPERATION

      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.
        Fig 6: Inspecting Operation Of Mirror Position Sensor
        G03476548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        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.
  6. INSPECT SEAT MEMORY SWITCH (w/ SEAT MEMORY SWITCH) 
    1. Inspect the seat memory switch continuity.

    Standard: 

    SEAT MEMORY SWITCH CONTINUITY

    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 7: Checking Seat Memory Switch Continuity
    G03476549Courtesy 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: 

      OUTER MIRROR CONTROL ECU ASSY VOLTAGE OR CONTINUITY

      Terminal No. Switch Position Specified Condition
      1 <=> Body ground Constant 10-14V
      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 8: Disconnecting Connector From Mirror Control ECU Assy
      G03476550Courtesy 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 9: Connecting Connector To Mirror Control ECU Assy
      G03476551Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    MIRROR CONTROL ECU ASSY VOLTAGE OR CONTINUITY

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

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

    Standard: 

    MIRROR CONTROL ECU ASSY VOLTAGE OR CONTINUITY

    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
    MIRROR CONTROL ECU ASSY VOLTAGE OR CONTINUITY

    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 light 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: 

    MIRROR CONTROL ECU ASSY VOLTAGE OR CONTINUITY

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

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

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