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Power Window Master Switch Power Source Circuit: Procedure

  1. CHECK WIRE HARNESS (MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND) 
    1. Disconnect the P22 connector.
      Fig 1: Identifying P22 Connector Terminals
      GTY124397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      P22-9 (CPUB) - Body ground Always 10 to 14 V
      P22-10 (BDR) - Body ground Always 10 to 14 V
      P22-20 (SIG) - Body ground Ignition switch ON 10 to 14 V

      Standard resistance

      Tester Connection Condition Specified Condition
      P22-2 (GND) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE