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Front Power Seat Control System: Inspection

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FRONT POWER SEAT SWITCH LH (W/O MEMORY) 
    1. Check the resistance between the terminals when each switch is operated.

      Standard: 

      Slide switch 

      SLIDE SWITCH TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 9 FRONT Below 1 Ω
      4 -- 6 FRONT Below 1 Ω
      4 -- 6 OFF Below 1 Ω
      4 -- 9 OFF Below 1 Ω
      1 -- 6 REAR Below 1 Ω
      4 -- 9 REAR Below 1 Ω

      Front vertical switch 

      FRONT VERTICAL SWITCH TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 10 UP Below 1 Ω
      4 -- 5 UP Below 1 Ω
      4 -- 5 OFF Below 1 Ω
      4 -- 10 OFF Below 1 Ω
      1 -- 5 DOWN Below 1 Ω
      4 -- 10 DOWN Below 1 Ω
      Fig 1: Locating Front Power Seat Switch LH
      G04332188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Rear vertical switch 

      REAR VERTICAL SWITCH TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 7 UP Below 1 Ω
      4 -- 8 UP Below 1 Ω
      4 -- 7 OFF Below 1 Ω
      4 -- 8 OFF Below 1 Ω
      1 -- 8 DOWN Below 1 Ω
      4 -- 7 DOWN Below 1 Ω

      Reclining switch 

      RECLINING SWITCH TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 3 FRONT Below 1 Ω
      2 -- 4 FRONT Below 1 Ω
      2 -- 4 OFF Below 1 Ω
      3 -- 4 OFF Below 1 Ω
      1 -- 2 REAR Below 1 Ω
      3 -- 4 REAR Below 1 Ω

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

  2. INSPECT FRONT POWER SEAT SWITCH RH 
    1. Check the resistance between the terminals when each switch is operated.

      Standard: 

      Slide switch 

      SLIDE SWITCH TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 9 FRONT Below 1 Ω
      4 -- 6 FRONT Below 1 Ω
      4 -- 6 OFF Below 1 Ω
      4 -- 9 OFF Below 1 Ω
      1 -- 6 REAR Below 1 Ω
      4 -- 9 REAR Below 1 Ω

      Reclining switch 

      RECLINING SWITCH TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 3 FRONT Below 1 Ω
      2 -- 4 FRONT Below 1 Ω
      2 -- 4 OFF Below 1 Ω
      3 -- 4 OFF Below 1 Ω
      1 -- 2 REAR Below 1 Ω
      3 -- 4 REAR Below 1 Ω

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

      Fig 2: Inspecting Front Power Seat Switch RH
      G04332189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT POWER SEAT SWITCH ASSY (LUMBAR SUPPORT) 
    1. Only on the driver side:

      Check the resistance between the terminals when the switch is operated.

      Standard: 

      SWITCH CONDITION TABLE

      Tester Connection Switch Condition Specified Condition
      1 -- 2 HOLD Below 1 Ω
      3 -- 4 HOLD Below 1 Ω
      1 -- 2 OFF Below 1 Ω
      4 -- 5 OFF Below 1 Ω
      1 -- 3 RELEASE Below 1 Ω
      4 -- 5 RELEASE Below 1 Ω

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

      Fig 3: Inspecting Power Seat Switch Assy (Lumbar Support)
      G04332190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT SEAT MEMORY SWITCH 
    1. Measure the resistance between the terminals when each switch is operated.

      Standard: 

      SWITCH OPERATION TABLE

      Tester Connection Switch Operation Specified Condition
      1 -- 4 SET switch pushed Below 1 Ω
      2 -- 4 SW1 switch pushed Below 1 Ω
      3 -- 4 SW2 switch pushed Below 1 Ω

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

      Fig 4: Inspecting Seat Memory Switch
      G04332191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT FRONT SEAT ADJUSTER ASSY 
    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.

        Standard: 

        MEASUREMENT CONDITION TABLE

        Measurement Condition Operational Direction
        Battery positive (+) <==> 2
        Battery negative (-) <==> 1        		 Clockwise
        Battery positive (+) <==> 1
        Battery negative (-) <==> 2        		 Counterclockwise

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

        Fig 5: Identifying Seat Motor Connector Terminals
        G04332192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Only on the driver side:

      Check operation of the vertical motor.

      1. Check if the motor rotates smoothly when the battery is connected to the vertical motor connector terminals.

        Standard: 

        MEASUREMENT CONDITION TABLE

        Measurement Condition Operational Direction
        Battery positive (+) <==> 2
        Battery negative (-) <==> 1        		 Clockwise
        Battery positive (+) <==> 1
        Battery negative (-) <==> 2        		 Counterclockwise

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

        Fig 6: Identifying Seat Motor Connector Terminals
        G04332193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Only on the driver side:

      Check operation of the rear vertical motor.

      1. Check if the motor rotates smoothly when the battery is connected to the rear vertical motor connector terminals.

        Standard: 

        MEASUREMENT CONDITION TABLE

        Measurement Condition Operational Direction
        Battery positive (+) <==> 2
        Battery negative (-) <==> 1        		 Clockwise
        Battery positive (+) <==> 1
        Battery negative (-) <==> 2        		 Counterclockwise

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

        Fig 7: Identifying Seat Motor Connector Terminals
        G04332194Courtesy 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.

        Standard: 

        MEASUREMENT CONDITION TABLE

        Measurement Condition Operational Direction
        Battery positive (+) <==> 2
        Battery negative (-) <==> 1        		 Clockwise
        Battery positive (+) <==> 1
        Battery negative (-) <==> 2        		 Counterclockwise

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

        Fig 8: Identifying Seat Motor Connector Terminals
        G04332195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT LUMBAR SUPPORT ADJUSTER ASSY 
    1. Only on the driver side:

      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.

        Standard: 

        MEASUREMENT CONDITION TABLE

        Measurement Condition Operational Direction
        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 9: Checking Operation Of Lumbar Support Adjuster Motor
        G04332196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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