Front Power Seat Control System: Inspection

2004 Toyota Celica GT, StandardSECTION 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
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.