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Home >> Lexus >> 2005 >> SC 430 >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Power Door Lock Control System - Diagnostics >> Key Confinement Prevention Function Does Not Work Properly (Courtesy Lamp Switch Circuit) >> Inspection Procedure
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Inspection Procedure

  1. CHECK COURTESY LAMP 
    1. Check that at the door open lamp will be on when the driver's door is opened.
    1. OK: REPLACE THEFT WARNING ECU ASSY 
    2. NG: Go to next step. 
  2. CHECK MULTIPLEX NETWORK DOOR ECU FRONT LH 
    1. Connector connected, measure the voltage of the wire harness side connectors.
      Fig 1: Identifying Connectors
      G02956923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D17-27 (CTY) - D19-1 (GND) Driver's door CLOSED 10 to 14 V
    1. NG: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH 
    2. OK: Go to next step. 
  3. CHECK WIRE HARNESS (FRONT DOOR COURTESY LAMP SWITCH ASSY - MULTIPLEX NETWORK DOOR ECU FRONT LH) 
    1. Disconnect the D8 switch and D17 ECU connectors.
    2. Measure the resistance of the wire harness side connectors.
      Fig 2: Identifying D8 Switch & D17 ECU Connectors
      G02956924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      D8-1 (+) - D17-27 (CTY) Below 1 ohms
      D8-1 (+) or D17-27 (CTY) - Body ground 10 k ohms or higher
    1. NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 
    2. OK: Go to next step. 
  4. INSPECT FRONT DOOR COURTESY LAMP SWITCH ASSY 
    1. Measure the resistance of the switch.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      1 - Body ground Not pushed (ON) Below 1 ohms
      1 - Body ground Pushed (OFF) 10 k ohms or higher
      Fig 3: Identifying Front Door Courtesy Lamp Switch ASSY
      G02956925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSY 
    2. OK: REPLACE TRANSPONDER KEY ECU ASSY 
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