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Power Mirror Control System: Inspection

  1. INSPECT LEFT SIDE MIRROR SWITCH CONTINUITY 
    SPECIFIED CONDITION

    Switch position Tester connection Specified condition
    OFF - No continuity
    UP 3-4
    1-7-8    		 Continuity
    DOWN 1-3-8
    4-7    		 Continuity
    LEFT 4-9
    1-7-8    		 Continuity
    RIGHT 4-7
    1-8-9    		 Continuity

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

    If the continuity is as specified, inspect the switch circuit.

  2. INSPECT RIGHT SIDE MIRROR SWITCH CONTINUITY 
    SPECIFIED CONDITION

    Switch position Tester connection Specified condition
    OFF - No continuity
    UP 2-4
    1-7-8    		 Continuity
    DOWN 4-7
    1-2-8    		 Continuity
    LEFT 4-10
    1-7-8    		 Continuity
    RIGHT 4-7
    1-8-10    		 Continuity

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

    If the continuity is as specified, inspect the switch circuit.

    Fig 1: Inspecting Right Side Mirror Switch Continuity
    G03375628Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT RETRACT SWITCH CONTINUITY 
    SPECIFIED CONDITION

    Switch position Tester connection Specified condition
    RETURN 1-5
    2-4    		 Continuity
    RETRACT 1-2
    4-5    		 Continuity

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

    If the continuity is as specified, inspect the switch circuit.

    Fig 2: Inspecting Retract Switch Continuity
    G03375629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT MIRROR SWITCH CIRCUIT 

    Disconnect the connector from the switch and inspect the connector on the wire harness side.

    Fig 3: Inspecting Connector On Wire Harness Side
    G03375630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SPECIFIED CONDITION

    Tester connection Condition Specified condition
    8 - Ground Always Continuity
    4 - Ground Ignition switch position LOCK No voltage
    4 - Ground Ignition switch position ACC or ON Battery positive voltage

    If the circuit is not as specified, inspect the circuits connected to other parts.

  5. INSPECT INDICATOR LIGHT OPERATION 

    Connect the battery positive (+) lead to terminal 5 and the battery negative (-) lead to terminal 6. If the indicator light does not come on, replace the switch.

    Fig 4: Connecting Battery Positive (+) Lead To Terminal 5
    G03375631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT MIRROR MOTOR OPERATION 
    1. Connect the battery positive (+) lead to terminal 8 and the battery negative (-) lead to terminal 7, and check that the mirror turns to the left side.
      Fig 5: Checking That Mirror Turns To Left Side
      G03375632Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity, and check that the mirror turns to the right side.
      Fig 6: Checking That Mirror Turns To Right Side
      G03375633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the battery positive (+) lead to terminal 6 and the battery negative (-) lead to terminal 7, and check that the mirror turns upward.
      Fig 7: Checking That Mirror Turns Upward
      G03375634Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reverse the polarity, and check that the mirror turns downward.

      If operation is not as specified, replace the mirror assembly.

    Fig 8: Checking That Mirror Turns Downward
    G03375635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. w/ Driving Position Memory only: 

    INSPECT MIRROR POSITION SENSORS OPERATION 

    HINT:

    Strip off the vinyl tape on the connector and remove terminal 6, 7, 9, 10, 15 and 16 from the connector housing.

    1. Connect a series of three 1.5 V dry cell batteries.
    2. Connect the positive (+) lead from the dry cell batteries to terminal 9 and its negative (-) lead to terminal 15.
      Fig 9: Connecting Positive (+) Lead From Dry Cell Batteries To Terminal 9
      G03375636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the voltmeter positive (+) lead to terminal 16 and the voltmeter negative (-) lead to terminal 15.
    4. Apply battery positive voltage to terminal 7 and 6, then check that the voltage gradually changes as shown in the table below while the mirror moves between the uppermost position and the lowermost position.
      Mirror Position

      Mirror position Lowermost Mirror position Uppermost
      Voltage 2.8-5.0 Changes gradually 0-1.8

      If the voltage value is not as specified, replace the motor assembly.

      Fig 10: Checking That Mirror Moves Between Uppermost Position & Lowermost Position
      G03375637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the 4 leads of the battery and voltmeter.
    6. Connect the voltmeter positive (+) lead to terminal 10 and the voltmeter negative (-) lead to terminal 15.
    7. Apply battery positive voltage to terminal 7 and 8, then inspect that the voltage gradually changes as shown in the table below while the mirror moves between the left-most position and right-most position.
    Fig 11: Checking That Mirror Moves Left-Most Position
    G03375638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MIRROR POSITION

    Mirror position Left-most Mirror position Right-most
    Voltage LEFT 2.8-5.0 Changes gradually 0-1.8
    Voltage RIGHT 0-1.8 Changes gradually 2.8-5.0

    If the voltage value is not as specified, replace the motor assembly.

    Fig 12: Checking That Mirror Moves Right-Most Position
    G03375639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSPECT DRIVING POSITION MEMORY AND RETURN SWITCH CONTINUITY 
    SPECIFIED CONDITION

    Switch position Tester connection Specified condition
    SET switch ON 3-4 Continuity
    Return SW1 ON 2-3 Continuity
    Return SW2 ON 1-3 Continuity

    If the continuity is not as specified, replace the switch

    Fig 13: Identifying Terminal & Switch
    G03375640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT DRIVING POSITION MEMORY AND RETURN SWITCH CIRCUIT (See  MEMORY SWITCH CIRCUIT (W/ MEMORY)  ) 
  10. INSPECT MIRROR CONTROL ECU CIRCUIT 

    Disconnect the connector from ECU and inspect the connector on the wire harness side.

    Fig 14: Disconnecting Connector From ECU
    G03375641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SPECIFIED CONDITION

    Tester connection Condition Specified condition
    3-16 Right side mirror switch to RIGHT Continuity
    4-16 Left side mirror switch to RIGHT Continuity
    5-16 Right side mirror switch to DOWN Continuity
    6-16 Left side mirror switch to DOWN Continuity
    3-17 Right side mirror switch to LEFT Continuity
    4-17 Left side mirror switch to LEFT Continuity
    5-17 Right side mirror switch to UP Continuity
    6-17 Left side mirror switch to UP Continuity
    7-19 Constant Continuity
    14-Ground Constant Continuity
    1 - Ground Constant Battery positive voltage
    2 - Ground Ignition switch OFF No voltage
    2 - Ground Ignition switch ACC or ON Battery positive voltage

    If the circuit is not as specified, inspect the circuits connected to other parts.

  11. INSPECT MIRROR CONTROL ECU OPERATION 

    Connect the connectors, and using a voltmeter with high impedance (10 kΩ/V minimum), measure the voltage at each terminal and body ground.

    Fig 15: Measuring Voltage At Each Terminal & Body Ground
    G03375642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SPECIFIED CONDITION

    Tester connection Condition Specified condition
    3 - Ground Always About 5 V
    4 - Ground Always About 5 V
    5 - Ground Always About 5 V
    6 - Ground Always About 5 V
    7 - Ground Right or left side mirror switch to any position except OFF About 5 V
    (1) 8 - Ground Left side mirror to lowermost position 2.8-5.0 V
    (1) 8 - Ground Left side mirror to uppermost position 0-0.9V
    (1) 9 - Ground Left side mirror to leftmost position 2.8-5.0 V
    (1) 9 - Ground Left side mirror to rightmost position 0-0.9V
    10 - Ground Left side mirror switch to LEFT or DOWN Battery positive voltage
    11 -Ground Left side mirror switch to RIGHT Battery positive voltage
    12-Ground Left side mirror switch to UP Battery positive voltage
    (1) 20 - Ground Right side mirror to lowermost position 2.8-5.0 V
    (1) 20 - Ground Right side mirror to uppermost position 0-0.9V
    (1) 21 - Ground Right side mirror to leftmost position 2.8-5.0 V
    (1) 21 - Ground Right side mirror to rightmost position 0-0.9 V
    22 - Ground Right side mirror switch to RIGHT or DOWN Battery positive voltage
    23 - Ground Right side mirror switch to LEFT Battery positive voltage
    24 - Ground Right side mirror switch to UP Battery positive voltage
    (1) Confirm that the voltage changes gradually while the mirror moves.

    If the operation is not as specified, inspect the wire harness, the mirror switch or the motor assembly. Then if these are correct, replace the ECU.

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