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Home >> Lexus >> 2009 >> LS 460 AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Door Lock >> Smart Access System With Push-Button Start >> Driver Side Door Entry Lock Function does not Operate >> Inspection Procedure
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Inspection Procedure

  1. CHECK POWER DOOR LOCK OPERATION 
    1. When the master switch assembly's door control switch is operated, check that the locked doors unlock.

      Result 

      RESULT CHART

      Result Proceed to
      Door locks operate normally OK
      Door locks do not operate normally NG

      NG:  GO TO POWER DOOR LOCK CONTROL SYSTEM 

      OK: Go to next step 

  2. READ VALUE USING TECHSTREAM (OUTSIDE HANDLE) 
    1. Using the Techstream, read the Data List.

      Driver Door (Front door ECU LH) 

      DRIVER DOOR (FRONT DOOR ECU LH) DATA LIST REFERENCE

      Tester Display Measurement Item/Display Normal Condition Diagnostic Note
      Outside Handle Trigger SW Driver side door outside handle lock switch/ON or OFF ON: Driver side door outside handle lock switch is pushed
      OFF: Driver side door outside handle lock switch is not pushed      		 -

      OK: On the screen, item changes between ON and OFF according to above chart. 

      NG:  Go to step  4

      OK: Go to next step 

  3. CHECK FRONT DOOR ECU LH (OPERATION) 
    1. Replace the front door ECU LH with a new one or normally functioning one (see REMOVAL ).
    2. Check that the entry function operates normally.

      OK: Operates normally 

      NG: REPLACE CERTIFICATION ECU 

      OK: END (FRONT DOOR ECU LH IS DEFECTIVE) 

  4. INSPECT FRONT DOOR OUTSIDE HANDLE LH 
    1. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      b2-3 (TRG+) - b2-1 (TRG-) ON Below 1 Ω
      b2-3 (TRG+) - b2-1 (TRG-) OFF 10 kΩ or higher
      Fig 1: Identifying B2 Front Door Outside Handle LH Connector Terminals
      G05852845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE FRONT DOOR OUTSIDE HANDLE LH  (See REMOVAL )

      OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE LH - FRONT DOOR ECU LH) 
    Fig 2: Identifying B2 Handle Connector And N10 ECU Connector Terminals
    G04951683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the b2 handle connector.
    2. Disconnect the N10 ECU connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      b2-3 (TRG+) - N10-20 (TRG+) Always Below 1 Ω
      b2-3 (TRG+) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE LH - DOOR ELECTRICAL KEY OSCILLATOR) 
    Fig 3: Identifying B2 Handle Connector And B1 Oscillator Connector Terminals
    G04951684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the b2 handle connector.
    2. Disconnect the b1 oscillator connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      b2-1 (TRG-) - b1-9 (TRG-) Always Below 1 Ω
      b2-1 (TRG-) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  7. CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION) 
    1. Replace the door electrical key oscillator with a new one or normally functioning one (see REMOVAL ).
    2. Check that the entry function operates normally.

      OK: Operates normally 

      NG: Go to step 8 

      OK: END (DOOR ELECTRICAL OSCILLATOR IS DEFECTIVE) 

  8. CHECK FRONT DOOR ECU LH (OPERATION) 
    1. Replace the front door ECU LH with a new one or normally functioning one (see REMOVAL ).
    2. Check that the entry function operates normally.

      OK: Operates normally 

      NG: REPLACE CERTIFICATION ECU 

      OK: END (FRONT DOOR ECU LH IS DEFECTIVE) 

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