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Home › Lexus › 2007 › GS 430 › Repair and Diagnosis › Body & Frame › Door Locks › Door Lock › Smart Access System With Push-Button Start › Driver Side Door Entry Lock and Unlock Functions do not Operate › Inspection Procedure

Inspection Procedure

  1. CHECK MANUAL DOOR LOCK AND UNLOCK OPERATION 
    1. Check that the manual door lock and unlock function operates normally.

      OK: 

      Manual door lock and unlock function operates normally. 

    NG:  GO TO POWER DOOR LOCK CONTROL SYSTEM 

    OK: Go to next step 

  2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (DOOR ELECTRICAL KEY OSCILLATOR FRONT LH) 
    1. Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the oscillator operates.

    Certification ECU: 

    CERTIFICATION ECU - ACTIVE TEST LIST

    Item Test Details Diagnostic Note
    D TRANSMITTER Driver side transmitter ON / OFF -

    OK: 

    When key is brought close to door oscillator that is OFF, indicator light on key illuminates. 

    OK: REPLACE CERTIFICATION ECU ASSEMBLY 

    NG: Go to next step 

  3. CHECK WIRE HARNESS (ECU - OSCILLATOR) 
    1. Disconnect the U28 ECU connector.
    2. Disconnect the q2 oscillator connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U28-33 (CLG1) - q2-10 (CLG) Below 1 Ω
      U28-34 (CG1B) - q2-5 (CLGB) Below 1 Ω
    Fig 1: Identifying U28 ECU And Q2 Oscillator Connector Terminals
    G05299253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  4. CHECK WIRE HARNESS (OSCILLATOR - ANTENNA) 
    1. Disconnect the q2 oscillator connector.
    2. Disconnect the q1 antenna connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      q2-2 (SGT) - q1-6 (SGT2) Below 1 Ω
      q2-3 (ANT1) - q1-5 (ANT1) Below 1 Ω
      q2-8 (ANT2) - q1-2 (ANT2) Below 1 Ω
      q2-9 (TRG-) - q1-1 (TRG-) Below 1 Ω
    Fig 2: Identifying Q2 Oscillator And Q1 Antenna Connector Terminals
    G05299254Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  5. CHECK WIRE HARNESS (OSCILLATOR - ECU) 
    1. Disconnect the q2 oscillator connector.
    2. Disconnect the N4 ECU connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      q2-1 (+B) - N4-7 (OSCB) Below 1 Ω
      q2-7 (GND) - N4-20 (OSCE) Below 1 Ω
    Fig 3: Identifying Q2 Oscillator And N4 Connector Terminals
    G05299255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  6. CHECK WIRE HARNESS (ANTENNA - ECU) 
    1. Disconnect the q1 oscillator connector.
    2. Disconnect the N4 ECU connector.
    3. Measure the resistance of the wire harness side connector.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      q1-3 (TRG+) - N4-18 (TRG+) Below 1 Ω
    Fig 4: Identifying Q1 Oscillator And N4 ECU Connector Terminals
    G05299256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  7. CHECK OPERATION OF ELECTRICAL KEY ANTENNA FRONT LH 
    1. After replacing the electrical key antenna front LH with a normal one, check that the entry lock and unlock functions operate normally.

      OK: 

      Entry lock and unlock functions operate normally. 

    OK: END (ELECTRICAL KEY ANTENNA FRONT LH IS DEFECTIVE) 

    NG: Go to next step 

  8. CHECK OPERATION OF DOOR ELECTRICAL KEY OSCILLATOR FRONT LH 
    1. After replacing the door electrical key oscillator front LH with a normal one, check that the entry lock and unlock functions operate normally.

      OK: 

      Entry lock and unlock functions operate normally. 

    NG: REPLACE CERTIFICATION ECU ASSEMBLY 

    OK: END (DOOR ELECTRICAL KEY OSCILLATOR FRONT LH IS DEFECTIVE) 

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