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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door Lock >> Power Door Lock Control System >> Key Lock-in Prevention Function does not Work Properly >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF INTELLIGENT TESTER (UNLOCK WARNING SWITCH) 
    1. Check the DATA LIST for proper functioning of the unlock warning switch.

      Immobilizer 

      DATA LIST - IMMOBILIZER

      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      Key SW Key unlock warning switch signal / ON or OFF ON: Key is in ignition key cylinder
      OFF: No key is in ignition key cylinder      		 -

      OK: "ON" (Key is in ignition key cylinder) appears on the screen. 

    NG: Go to step  6

    OK: Go to Next Step 

  2. READ VALUE OF INTELLIGENT TESTER (COURTESY SWITCH) 
    1. Check the DATA LIST for proper functioning of the courtesy switch.

      Driver Door 

      DATA LIST - DRIVER DOOR

      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      Courtesy SW Door courtesy switch signal / ON or OFF ON: Door is open
      OFF; Door is closed      		 -

    OK: REPLACE MULTIPLEX NETWORK FRONT DOOR ECU LH 

    NG: Go to Next Step 

  3. CHECK WIRE HARNESS (DOOR COURTESY LIGHT - DOOR ECU) 
    1. Disconnect the D8 switch connector.
    2. Disconnect the D17 ECU connector.
      Fig 1: Identifying Door Courtesy Light And Door ECU
      G05292886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      D8-1 (+) - D17-27 (CTY) Below 1 Ω
      D8-1 (+) - Body ground 10 kΩ or higher
      D17-27 (CTY) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  4. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH 
    Fig 2: Identifying Front Door Courtesy Switch Assembly (Driver Side)
    G05292887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      1-Body ground Not pushed (ON) Below 1 Ω
      1- Body ground Pushed (OFF) 10 kΩ or higher

    NG: REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH 

    OK: REPLACE MULTIPLEX NETWORK FRONT DOOR ECU LH 

  5. INSPECT UNLOCK WARNING SWITCH 
    Fig 3: Identifying Unlock Warning Switch Connector Terminals
    G05292888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the unlock warning switch.
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      1-2 Not pushed 10 kΩ or higher
      1-2 Pushed Below 1 Ω

    NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY 

    OK: Go to Next Step 

  6. CHECK WIRE HARNESS (SWITCH - ECU) 
    1. Disconnect the U1 switch connector.
    2. Disconnect the T13 ECU connector.
      Fig 4: Identifying Unlock Warning Switch And Transponder Key ECU
      G05292889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      U1-1 - Body ground Below 1 Ω
      U1-1 - T13-3 (KSW) Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE TRANSPONDER KEY ECU 

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