2004 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Section 455 (Power Mirror Control System): Inspection

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT OUTER MIRROR SWITCH ASSY 
    1. Select "L" or "R" on the left/right adjustment switch.

      Measure the switch resistance.

      Standard: 

      SWITCH CONDITION SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      O3-7 - O3-9 OFF 10 kΩ or higher
      O3-7 - O3-9 UP 90 to 100 Ω
      O3-7 - O3-9 DOWN 435 to 505 Ω
      O3-7 - O3-9 LEFT 740 to 860 Ω
      O3-7 - O3-9 RIGHT 220 to 280 Ω

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

      Fig 1: Measuring Switch Resistance
      G03514148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the left/right adjustment switch resistance.

      Standard: 

      SWITCH CONDITION SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      O3-8 - O3-9 L 90 to 110 Ω
      O3-8 - O3-9 R 10 Ω or less

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

      Fig 2: Measuring Left/Right Adjustment Switch Resistance
      G03514149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the retract switch resistance.

      Standard: 

      SWITCH CONDITION SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      O4-4 - O4-7 (B) position Below 1 Ω
      O4-2 - O4-4 (A) position Below 1 Ω

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

    4. Measure the clearance sonar switch resistance.
      SWITCH CONDITION SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      3 - 4 OFF 10 kΩ or higher
      3 - 4 ON Below 1 Ω

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

      Fig 3: Measuring Clearance Sonar Switch Resistance
      G03514150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT SEAT MEMORY SWITCH 
    1. Measure the switch resistance.

      Standard: 

      SWITCH CONDITION SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      2 - 6 SET Switch ON Below 1 Ω
      3 - 6 M1 Switch ON Below 1 Ω
      4 - 6 M2 Switch ON Below 1 Ω
      5 - 6 M3 Switch ON Below 1 Ω

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

      Fig 4: Measuring Switch Resistance
      G03514151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT OUTER REAR VIEW MIRROR ASSY LH 
    1. Disconnect the mirror connector.
    2. Apply battery voltage and check operation of the mirror.

      OK: 

      MEASUREMENT CONDITION SPECIFICATION

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal R39-1 (#MVR)
      Battery negative (-) --> Terminal R39-10 (#M+R)      		 Turns upward (A)
      Battery positive (+) --> Terminal R39-10 (#M+R)
      Battery negative (-) --> Terminal R39-1 (#MVR)      		 Turns downward (B)
      Battery positive (+) --> Terminal R39-10 (#M+R)
      Battery negative (-) --> Terminal R39-9 (#MHR)      		 Turns right (D)
      Battery positive (+) --> Terminal R39-9 (#MHR)
      Battery negative (-) --> Terminal R39-10 (#M+R)      		 Turns left (C)

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

      Fig 5: Disconnecting Mirror Connector
      G03514152Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Apply battery voltage and check the mirror retract operation.
      NOTE:
      • Disconnect and reconnect the battery once between each mirror position check.
      • The mirror position cannot be changed manually when the battery is connected. If you wish to change the mirror position manually, disconnect the battery first before doing so.

      OK: 

      MIRROR CONDITION SPECIFICATION

      Measurement Condition Mirror Condition Specified Condition
      Battery positive (+) --> Terminal R39-11 (MR-)
      Battery negative (-) --> Terminal R39-3 (MR+)      		 Retracted position Moves from retracted position to driving position
      Battery positive (+) --> Terminal R39-3 (MR+)
      Battery negative (-) --> Terminal R39-11 (MR-)      		 Driving position Moves from driving position to retracted position

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

      Fig 6: Applying Battery Voltage And Checking Mirror Retract Operation
      G03514153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT OUTER REAR VIEW MIRROR ASSY RH 
    1. Disconnect the mirror connector.
    2. Apply battery voltage and check operation of the mirror.

      OK: 

      MEASUREMENT CONDITION SPECIFICATION

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal R40-1 (#MVR)
      Battery negative (-) --> Terminal R40-10 (#M+R)      		 Turns upward (A)
      Battery positive (+) --> Terminal R40-10 (#M+R)
      Battery negative (-) --> Terminal R40-1 (#MVR)      		 Turns downward (B)
      Battery positive (+) --> Terminal R40-10 (#M+R)
      Battery negative (-) --> Terminal R40-9 (#MHR)      		 Turns right (D)
      Battery positive (+) --> Terminal R40-9 (#MHR)
      Battery negative (-) --> Terminal R40-10 (#M+R)      		 Turns left (C)

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

      Fig 7: Applying Battery Voltage And Checking Mirror Retract Operation
      G03514154Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Apply battery voltage and check the mirror retract operation.
      NOTE:
      • Disconnect and reconnect the battery once between each mirror position check.
      • The mirror position cannot be changed manually when the battery is connected. If you wish to change the mirror position manually, disconnect the battery first before doing so.

      OK: 

      MIRROR CONDITION SPECIFICATION

      Measurement Condition Mirror Condition Specified Condition
      Battery positive (+) --> Terminal R40-11 (MR-)
      Battery negative (-) --> Terminal R40-3 (MR+)      		 Retracted position Mirror moves from retracted position to driving position
      Battery positive (+) --> Terminal R40-3 (MR+)
      Battery negative (-) --> Terminal R40-11 (MR-)      		 Driving position Mirror moves from driving position to retracted position

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

      Fig 8: Applying Battery Voltage And Checking Mirror Retract Operation
      G03514155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT MIRROR POSITION SENSOR 
    1. Check the voltage.
      1. Apply voltage to the terminals with a battery and a dry cell battery, as shown in the table below.
      2. Measure the voltage while the mirror moves between the fully turned downward position and fully turned upward position.
        Fig 9: Measuring Voltage While Mirror Moves Between Fully Turned Downward Position And Upward Position
        G03514156Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        VOLTMETER CONDITION SPECIFICATION

        Measurement Condition (battery) Measurement Condition (dry cell battery) Voltmeter Condition Mirror Condition Specified Condition
        Battery positive (+) --> Terminal R39/R40-1
        Battery negative (-) --> Terminal R39/R40-10        		 Battery positive (+) --> Terminal R39/R40-5
        Battery negative (-) --> Terminal R39/R40-14        		 Positive lead (+) --> Terminal R39/R40-6
        Negative lead (-) --> Terminal R39/R40-14        		 Turns downward fully 2.8 to 5.0 V
        Battery positive (+) --> Terminal R39/R40-10
        Battery negative (-) --> Terminal R39/R40-1        		 Battery positive (+) --> Terminal R39/R40-5
        Battery negative (-) --> Terminal R39/R40-14        		 Positive lead (+) --> Terminal R39/R40-6
        Negative lead (-) --> Terminal R39/R40-14        		 Turns upward fully 0 to 1.0 V

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

      3. Measure the voltage while the mirror moves between the fully turned to the left position and fully turned to the right position.
        Fig 10: Measuring Voltage While Mirror Moves Between Fully Turned To Position
        G03514157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (right side mirror): 

        VOLTMETER CONDITION SPECIFICATIONS

        Measurement Condition (battery) Measurement Condition (dry cell battery) Voltmeter Condition Mirror Condition Specified Condition
        Battery positive (+) --> Terminal R39/R40-9
        Battery negative (-) --> Terminal R39/R40-10        		 Battery positive (+) --> Terminal R39/R40-5
        Battery negative (-) --> Terminal R39/R40-14        		 Positive lead (+) --> Terminal R39/R40-13
        Negative lead (-) --> Terminal R39/R40-14        		 Turns to the left fully 2.8 to 5.0 V
        Battery positive (+) --> Terminal R39/R40-10
        Battery negative (-) --> Terminal R39/R40-9        		 Battery positive (+) --> Terminal R39/R40-5
        Battery negative (-) --> Terminal R39/R40-14        		 Positive lead (+) --> Terminal R39/R40-13
        Negative lead (-) --> Terminal R39/R40-14        		 Turns to the right fully 0 to 1.0 V

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

        Standard (left side mirror): 

        VOLTMETER CONDITION SPECIFICATIONS

        Measurement Condition (battery) Measurement Condition (dry cell battery) Voltmeter Condition Mirror Condition Specified Condition
        Battery positive (+) --> Terminal R39/R40-9
        Battery negative (-) --> Terminal R39/R40-10        		 Battery positive (+) --> Terminal R39/R40-5
        Battery negative (-) --> Terminal R39/R40-14        		 Positive lead (+) --> Terminal R39/R40-13
        Negative lead (-) --> Terminal R39/R40-14        		 Turns to the left fully 0 to 1.0 V
        Battery positive (+) --> Terminal R39/R40-10
        Battery negative (-) --> Terminal R39/R40-9        		 Battery positive (+) --> Terminal R39/R40-5
        Battery negative (-) --> Terminal R39/R40-14        		 Positive lead (+) --> Terminal R39/R40-13
        Negative lead (-) --> Terminal R39/R40-14        		 Turns to the right fully 2.8 to 5.0 V

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

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