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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
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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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