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Home >> Toyota >> 2004 >> Avalon XLS >> Repair and Diagnosis >> Body & Frame >> Seats >> Power Seat Control System (W/Driving Position Memory - Diagnostics >> Circuit Inspection >> Power Seat Control Switch Circuit >> Inspection Procedure
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Inspection Procedure

  1. Check voltage between each terminal of the Power Seat Control Switch and SGND of Seat Position Control ECU connector. 

    PREPARATION: 

    Remove Seat Position Control ECU with connectors still connected.

    CHECK: 

    Measure voltage between each terminal of the Power Seat Control Switch and SGND of Seat Position Control ECU connector. (The illustration shows inspection of the reclining as an example.)

    OK: 

    Fig 1: Checking Voltage Between Each Terminal Of Power Seat Control Switch And SGND Of Seat Position Control ECU Connector
    G02836254Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS VOLTAGE REFERENCE

    At each terminal with switch ON 0 V
    At each terminal with switch OFF 10-14 V
    1. OK: Proceed to next circuit inspection shown in problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. NG: Go to next step. 
  2. Check power seat control switch. 

    PREPARATION: 

    1. Remove seat.
    2. Disconnect power seat control switch.

      CHECK: 

      Check continuity between terminals when switch operated.

      OK: 

      Driver's seat slide switch: 

      TERMINALS CONTINUITY REFERENCE (DRIVER'S SEAT SLIDE SWITCH)

      Switch position Tester connection Specified condition
      FRONT 1-9 Continuity
      BACK 1-6 Continuity

      Driver's seat front vertical switch: 

      TERMINALS CONTINUITY REFERENCE (DRIVER'S SEAT FRONT VERTICAL SWITCH)

      Switch position Tester connection Specified condition
      UP 1-5 Continuity
      DOWN 1-10 Continuity

      Driver's seat lifter switch: 

      TERMINALS CONTINUITY REFERENCE (DRIVER'S SEAT LIFTER SWITCH)

      Switch position Tester connection Specified condition
      UP 1-8 Continuity
      DOWN 1-7 Continuity
      Fig 2: Checking Power Seat Control Switch
      G02836255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Driver's seat reclining switch: 

      TERMINALS CONTINUITY REFERENCE (DRIVER'S SEAT RECLINING SWITCH)

      Switch position Tester connection Specified condition
      FORWARD 1-3 Continuity
      REAR 1-2 Continuity

      Passenger's slide switch: 

      TERMINALS CONTINUITY REFERENCE (PASSENGER'S SLIDE SWITCH)

      Switch position Tester connection Specified condition
      FRONT 1-9 Continuity
      BACK 1-6 Continuity

      Passenger's front vertical switch: 

      TERMINALS CONTINUITY REFERENCE (PASSENGER'S FRONT VERTICAL SWITCH)

      Switch position Tester connection Specified condition
      UP 1-10 Continuity
      DOWN 1-5 Continuity

      Passenger's lifter switch: 

      TERMINALS CONTINUITY REFERENCE (PASSENGER'S LIFTER SWITCH)

      Switch position Tester connection Specified condition
      UP 1-7 Continuity
      DOWN 1-8 Continuity

      Passenger's reclining switch: 

      TERMINALS CONTINUITY REFERENCE (PASSENGER'S RECLINING SWITCH)

      Switch position Tester connection Specified condition
      FORWARD 1-3 Continuity
      REAR 1-2 Continuity
      1. NG: Replace power seat control switch. 
      2. OK: Go to next step. 
    3. Check harness and connectors between Seat Position Control ECU and power seat control switch (See  HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS  ). 
      1. NG: Repair or replace harness or connector. 
      2. OK: Check and replace Seat Position Control ECU. 
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