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Home >> Lexus >> 2005 >> LS 430 >> Repair and Diagnosis >> Body & Frame >> Seats >> Front Power Seat Control System - Diagnostics >> Power Seat Cushion Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT POWER SEAT CUSHION SWITCH 
    1. Remove the power seat cushion switch.
    2. Measure the resistance of the switch.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Switch Condition Specified Condition
    1 (CSNF) - 4 (E) FRONT Below 1 Ω
    1 (CSNF) - 4 (E), 2 (CSNR) - 4 (E) OFF 10 kΩ or higher
    2 (CSNR) - 4 (E) REAR Below 1 Ω
    Fig 1: Identifying Power Seat Cushion Switch Connector Terminals
    G03000988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE POWER SEAT CUSHION SWITCH 

    OK: GO TO NEXT STEP 

  2. CHECK WIRE HARNESS (POWER SEAT CONTROL SWITCH - DRIVER SEAT ECU AND BODY GROUND) 
    1. Disconnect D28 ECU and P22 switch connectors.
    2. Measure the resistance of the wire harness side connectors.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester connection Specified condition
    D28-4 (CSNR) - P22-2 (CSNR) Below 1 Ω
    D28-12 (CSNF) - P22-1 (CSNF) Below 1 Ω
    P22-4 (E) - Body ground Below 1 Ω
    Fig 2: Identifying P22 Power Seat Control Switch Connector Terminals And D28 Driver Seat ECU Connector Terminals
    G03000989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR AND REPLACE HARNESS AND CONNECTOR 

    OK: 

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  

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