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Front Power Seat Control System: Inspection

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FRONT POWER SEAT SWITCH LH 
    1. Measure the resistance between each terminal when each switch is operated.

      Standard (Slide switch): 

      FRONT POWER SEAT SLIDE SWITCH LH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 9
      4 - 6      		 FRONT Below 1 Ω
      6 - 4 - 9 OFF Below 1 Ω
      4 - 9
      1 - 6      		 REAR Below 1 Ω

      Standard (Front vertical switch): 

      FRONT POWER SEAT VERTICAL SWITCH LH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 10
      4 - 5      		 UP Below 1 Ω
      5 - 4 - 10 OFF Below 1 Ω
      4 - 10
      1 - 5      		 DOWN Below 1 Ω

      Standard (Lifter switch): 

      FRONT POWER SEAT LIFTER SWITCH LH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 7
      4 - 8      		 UP Below 1 Ω
      7 - 4 - 8 OFF Below 1 Ω
      1 - 8
      4 - 7      		 DOWN Below 1 Ω

      Standard (Reclining switch): 

      FRONT POWER SEAT RECLINING SWITCH LH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 3
      2 - 4      		 FRONT Below 1 Ω
      2 - 4 - 3 OFF Below 1 Ω
      1 - 2
      3 - 4      		 REAR Below 1 Ω

      If the result is not as specified, replace the front power seat switch.

      Fig 1: Identifying Front Power Seat Switch LH Connector Terminal
      G03484173Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FRONT POWER SEAT SWITCH RH 
    1. Measure the resistance between each terminal when each switch is operated.

      Standard (Slide switch): 

      FRONT POWER SEAT SLIDE SWITCH RH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 9
      4 - 6      		 FRONT Below 1 Ω
      6 - 4 - 9 OFF Below 1 Ω
      4 - 9
      1 - 6      		 REAR Below 1 Ω

      Standard (Front vertical switch): 

      FRONT POWER SEAT FRONT VERTICAL SWITCH RH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 5
      4 - 10      		 UP Below 1 Ω
      5 - 4 - 10 OFF Below 1 Ω
      1 - 10
      4 - 5      		 DOWN Below 1 Ω

      Standard (Rear vertical switch): 

      FRONT POWER SEAT REAR VERTICAL SWITCH RH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 8
      4 - 7      		 UP Below 1 Ω
      7 - 4 - 8 OFF Below 1 Ω
      1 - 7
      4 - 8      		 DOWN Below 1 Ω

      Standard (Reclining switch): 

      FRONT POWER SEAT RECLINING SWITCH RH TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 3
      2 - 4      		 FRONT Below 1 Ω
      2 - 4 - 3 OFF Below 1 Ω
      1 - 2
      3 - 4      		 REAR Below 1 Ω

      If the result is not as specified, replace the front power seat switch.

      Fig 2: Identifying Front Power Seat Switch RH Connector Terminal
      G03484174Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT POWER SEAT FRONT RH SWITCH ASSY 
    1. Measure the resistance between each terminal when each switch is operated.

      Standard: 

      POWER SEAT FRONT RH SWITCH ASSY TERMINAL RESISTANCE CHART

      Terminal No. Switch position Specified condition
      1 - 4
      2 - 3      		 FRONT Below 1 Ω
      3 - 2 - 4 OFF Below 1 Ω
      1 - 3
      2 - 4      		 REAR Below 1 Ω

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

      Fig 3: Identifying Power Seat Front RH Switch Assy
      G03484175Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying Power Seat Front RH Switch Assy Connector Terminal
      G03484176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT LUMBAR SUPPORT ADJUSTER ASSY RH 
    1. Inspect the motor operation.

      Standard: 

      LUMBAR SUPPORT ADJUSTER ASSY RH TESTER SPECIFIED CONDITION CHART

      Tester condition Specified condition
      Battery positive voltage - 1
      Battery negative voltage - 2      		 Clockwise
      Battery positive voltage - 2
      Battery negative voltage - 1      		 Counterclockwise

      If the result is not as specified, replace the power seat motor.

      Fig 5: Identifying Lumbar Support Adjuster Assy RH Connector Terminal
      G03484177Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT POWER SEAT MOTOR ASSY 
    1. Inspect the motor operation.
      1. Check that the motor rotates smoothly when the battery is connected to the connector terminal.
        Fig 6: Checking Motor Rotates Smoothly
        G03484178Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        POWER SEAT MOTOR ASSY TESTER SPECIFIED CONDITION CHART

        Tester condition Specified condition
        Battery positive voltage - 1
        Battery negative voltage - 2        		 Counterclockwise
        Battery positive voltage - 2
        Battery negative voltage - 1        		 Clockwise

        If the result is not as specified, replace the power seat motor.

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