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Home › Lexus › 2006 › LS 430 › Repair and Diagnosis › Body & Frame › Windows › Power Window Control System - Diagnostics › DTC B1225: Power Window Switch Circuit On Rear Right Door › Inspection Procedure

Inspection Procedure

  1. INSPECT POWER WINDOW REGULATOR SWITCH ASSY (REAR RH) 
    1. Remove the switch.
    2. Measure the resistance of the switch when the switch is operated.

    Standard 

    POWER WINDOW REGULATOR SWITCH ASSY (REAR RH) RESISTANCE SPECIFICATIONS

    Switch Condition Tester Connection Specified Condition
    AUTO UP 3 (A) - 8 (PCT) 1 (U) - 8 (PCT) Below 1 Ω
    UP 1 (U) - 8 (PCT) Below 1 Ω
    OFF - -
    DOWN 6 (D) - 8 (PCT) Below 1 Ω
    AUTO DOWN 3 (A) - 8 (PCT) 6 (D) - 8 (PCT) Below 1 Ω

    NG: REPLACE POWER WINDOW REGULATOR SWITCH ASSY (REAR RH) 

    Fig 1: Power Window Regulator Switch Assy (Rear RH) Connector Terminals
    G03000756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  2. CHECK WIRE HARNESS (POWER WINDOW REGULATOR SWITCH ASSY (REAR RH) - REAR DOOR RH ECU) 
    1. Disconnect the P12 switch connector.
    2. Disconnect the R15 ECU connector.
    3. Measure the resistance of the wire harness side connectors.

    Standard 

    RESISTANCE SPECIFICATIONS

    Tester Connection Specified Condition
    P12-1 (U) - R15-29 (MUP) Below 1 Ω
    P12-3 (A) - R15-10 (AUTO) Below 1 Ω
    P12-4 (E) - R15-19 (PWE) Below 1 Ω
    P12-6 (D) - R15-21 (MDN) Below 1 Ω
    P12-8 (PCT) - R15-11 (PCTO) Below 1 Ω
    P12-1 (U) or R15-29 (MUP) - Body ground 10 kΩ or higher
    P12-3 (A) or R15-10 (AUTO) - Body ground 10 kΩ or higher
    P12-4 (E) or R15-19 (PWE) - Body ground 10 kΩ or higher
    P12-6 (D) or R15-21 (MDN) - Body ground 10 kΩ or higher
    P12-8 (PCT) or R15-11 (PCTO) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 2: Identifying P12 Switch And R15 ECU Connector Terminals
    G03000757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE REAR DOOR RH ECU 

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