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Front Power Seat Control System - Diagnostics: Inspection

  1. Passenger's seat: 
    1. INSPECT POWER SEAT SWITCH 
    1. Measure the resistance between the terminals when each switch is operated.

    Standard: 

    Slide switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (B) - 12 (SLDF) FRONT Below 1 Ω
    6 (E) - 10 (SLDR) FRONT Below 1 Ω
    6 (E) - 12 (SLDF) OFF Below 1 Ω
    6 (E) - 10 (SLDR) OFF Below 1 Ω
    6 (E) - 12 (SLDF) REAR Below 1 Ω
    1 (B) - 10 (SLDR) REAR Below 1 Ω

    Front vertical switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (B) - 7 (FUP) UP Below 1 Ω
    6 (E) - 14 (FDWN) UP Below 1 Ω
    6 (E) - 7 (FUP) OFF Below 1 Ω
    6 (E) - 14 (FDWN) OFF Below 1 Ω
    6 (E) - 7 (FUP) DOWN Below 1 Ω
    1 (B) - 14 (FDWN) DOWN Below 1 Ω

    Lifter switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (B) - 4 (LUP) UP Below 1 Ω
    3 (LDWN) - 6 (E) UP Below 1 Ω
    4 (LUP) - 6 (E) OFF Below 1 Ω
    3 (LDWN) - 6 (E) OFF Below 1 Ω
    4 (LUP) - 6 (E) DOWN Below 1 Ω
    1 (B) - 3 (LDWN) DOWN Below 1 Ω

    Reclining switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (B) - 13 (RCLF) FRONT Below 1 Ω
    6 (E) - 11 (RCLR) FRONT Below 1 Ω
    6 (E) - 13 (RCLF) OFF Below 1 Ω
    6 (E) - 11 (RCLR) OFF Below 1 Ω
    6 (E) - 13 (RCLF) REAR Below 1 Ω
    1 (B) - 11 (RCLR) REAR Below 1 Ω
    Fig 1: Inspecting Power Seat Switch
    G03000995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Headrest switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (B) - 8 (HUP) UP Below 1 Ω
    6 (E) - 9 (HDWN) UP Below 1 Ω
    6 (E) - 8 (HUP) OFF Below 1 Ω
    6 (E) - 9 (HDWN) OFF Below 1 Ω
    6 (E) - 8 (HUP) DOWN Below 1 Ω
    1 (B) - 9 (HDWN) DOWN Below 1 Ω

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

  2. INSPECT DRIVING POSITION MEMORY SWITCH 
    1. Measure the resistance between the terminals when the switch is operated.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    2 (MMR) -6 (E) SET switch ON Below 1 Ω
    3 (1) -6 (E) 1 switch ON Below 1 Ω
    4 (2) - 6 (E) 2 switch ON Below 1 Ω
    5 (3) - 6 (E) 3 switch ON Below 1 Ω

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

    Fig 2: Identifying Driving Position Memory Switch Connector Terminals
    G03000996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Driver's seat: 
    1. INSPECT LUMBAR SUPPORT SWITCH 
    1. Measure the resistance between the terminals when the switch is operated.

    Standard: 

    Upper side control 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (H) - 5 (B) HOLD Below 1Ω
    4 (R) - 6 (E) HOLD Below 1Ω
    1 (H) - 6 (E) OFF Below 1Ω
    4 (R) - 6 (E) OFF Below 1Ω
    1 (H) - 6 (E) RELEASE Below 1Ω
    4 (R) - 5 (B) RELEASE Below 1Ω
    Fig 3: Identifying Lumbar Support Switch Connector Terminals - Driver Seat
    G03000997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Lower side control 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    2 (H1) - 5 (B) Hold Below 1Ω
    3 (R1) - 6 (E) Hold Below 1Ω
    2 (H1) - 6 (E) OFF Below 1Ω
    3 (R1) - 6 (E) OFF Below 1Ω
    2 (H1) - 6 (E) RELEASE Below 1Ω
    3 (R1) - 5 (B) RELEASE Below 1Ω

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

  4. Passenger's seat: 
    1. INSPECT LUMBAR SUPPORT SWITCH 
    1. Measure the resistance between the terminals when the switch is operated.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (B) - 4 (H) HOLD Below 1 Ω
    2 (E) - 3 (R) HOLD Below 1 Ω
    1 (B) - 3 (R) OFF Below 1 Ω
    2 (E) - 3 (R) OFF Below 1 Ω
    1 (B) - 3 (R) RELEASE Below 1 Ω
    2 (E) - 4 (H) RELEASE Below 1 Ω

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

    Fig 4: Identifying Lumbar Support Switch Connector Terminals - Passenger Seat
    G03000998Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Driver's seat: 
    1. INSPECT POWER SEAT CUSHION SWITCH 
    1. Measure the resistance between the terminals when the switch is operated.
    2. Remove the power seat cushion switch.
    3. Measure the resistance of the switch.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (CSNF) - 4 (E) FRONT Below 1 Ω
    1 (CSNF) - 4 (E), 2 (CSNR) -4 (E) OFF 10 kΩ higher
    2 (CSNR) - 4 (E) REAR Below 1 Ω

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

    Fig 5: Identifying Power Seat Cushion Switch Connector Terminals - Driver Seat
    G03000999Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Passenger's seat: 
    1. INSPECT POWER SEAT SWITCH SUB 
    1. Measure the resistance between the terminals when the switch is operated.

    Standard: 

    Reclining switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    5 (MRF) - 10 (B) FRONT Below 1 Ω
    6 (MRR) - 10 (B) FRONT Below 1 Ω
    5 (MRF) - 7 (RCLF) OFF Below 1 Ω
    2 (RCLR) - 6 (MRR) OFF Below 1 Ω
    6 (MRR) - 10 (B) REAR Below 1 Ω
    5 (MRF) - 7 (RCLF) REAR Below 1 Ω

    Slide switch 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    4 (MSF) - 10 (B) FRONT Below 1 Ω
    3 (SLDR) - 9 (MSR) FRONT Below 1 Ω
    4 (MSF) - 8 (SLDF) OFF Below 1 Ω
    3 (SLDR) - 9 (MSR) OFF Below 1 Ω
    9 (MSR) - 10 (B) REAR Below 1 Ω
    4 (MSF) - 8 (SLDF) REAR Below 1 Ω

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

    Fig 6: Identifying Power Seat Cushion Switch Connector Terminals - Passenger Seat
    G03001000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT POWER SEAT MOTOR 
    1. Check operation of the slide motor.
      1. Check if the motor rotates smoothly when the battery is connected to the slide motor connector terminals.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> 1 Battery negative (-) --> 2 Counterclockwise
      Battery positive (+) --> 2 Battery negative (-) --> 1 Clockwise

      If the result is not as specified, replace the slide motor.

      Fig 7: Checking Operation Of Slide Motor
      G03001001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check operation of the vertical motor.
      1. Check if the motor rotates smoothly when the battery is connected to the vertical motor connector terminals.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> 1 Battery negative (-) --> 2 Counterclockwise
      Battery positive (+) --> 2 Battery negative (-) --> 1 Clockwise

      If the result is not as specified, replace the vertical motor.

      Fig 8: Checking Operation Of Vertical Motor
      G03001002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check operation of the lifter motor.
      1. Check if the motor rotates smoothly when the battery is connected to the lifter motor connector terminals.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> 1 Battery negative (-) --> 2 Counterclockwise
      Battery positive (+) --> 2 Battery negative (-) --> 1 Clockwise

      If the result is not as specified, replace the lifter motor.

      Fig 9: Checking Operation Of Lifter Motor
      G03001003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check operation of the reclining motor.
      1. Check if the motor rotates smoothly when the battery is connected to the reclining motor connector terminals.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> 1 Battery negative (-) --> 2 Counterclockwise
      Battery positive (+) --> 2 Battery negative (-) --> 1 Clockwise

      If the result is not as specified, replace the reclining motor.

      Fig 10: Checking Operation Of Reclining Motor
      G03001004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check operation of the cushion slide motor.
      1. Check if the motor rotates smoothly when the battery is connected to the cushion slide motor connector terminals.

    OK: 

    MEASUREMENT CONDITION AND SPECIFIED CONDITION

    Measurement Condition Specified Condition
    Battery positive (+) --> 1 Battery negative (-) --> 2 Counterclockwise
    Battery positive (+) --> 2 Battery negative (-) --> 1 Clockwise

    If the result is not as specified, replace the cushion slide motor.

    Fig 11: Checking Operation Of Cushion Slide Motor
    G03001005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSPECT POWER SEAT MOTOR (LUMBAR SUPPORT) 
    1. Check operation of the lumbar support adjuster motor.
      1. Check if the motor rotates smoothly when the battery is connected to the lumbar support adjuster motor connector terminals.

    OK: 

    MEASUREMENT CONDITION AND SPECIFIED CONDITION

    Measurement Condition Specified Condition
    Battery positive (+) --> 1 Battery negative (-) --> 2 Clockwise
    Battery positive (+) --> 2 Battery negative (-) --> 1 Counterclockwise

    If the result is not as specified, replace the adjuster motor.

    Fig 12: Checking Operation Of Lumbar Support Adjuster Motor
    G03001006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT POWER SEAT MOTOR (HEADREST) 
    1. Check operation of the headrest motor.
      1. Check if the motor rotates smoothly when the battery is connected to the headrest motor connector terminals.

    OK: 

    MEASUREMENT CONDITION AND SPECIFIED CONDITION

    Measurement Condition Specified Condition
    Battery positive (+) --> 5 (DOWN) Battery negative (-) --> 1 (UP) Clockwise
    Battery positive (+) --> 1 (UP) Battery negative (-) --> 5 (DOWN) Counterclockwise

    If the result is not as specified, replace the headrest motor.

    Fig 13: Checking Operation Of Headrest Motor
    G03001007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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