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Home >> Lexus >> 2009 >> LS 460 AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door Lock >> Smart Access System With Push-Button Start >> Driver Side Door Entry Unlock 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 
    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
      Entry Sensor Driver side door touch sensor/ON or OFF ON: Driver side door sensor is touched
      OFF: Driver side door sensor is not touched      		 -

      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. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - FRONT DOOR LH) 
    Fig 1: Identifying N10 ECU Connector And B1 Oscillator Connector Terminals
    G04951636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N10 ECU 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
      N10-15 (SEL) - b1-4 (SEL) Always Below 1 Ω
      N10-15 (SEL) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - FRONT DOOR OUTSIDE HANDLE LH) 
    Fig 2: Identifying B1 Oscillator Connector And B2 Handle Connector Terminals
    G04951637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the b1 oscillator connector.
    2. Disconnect the b2 handle connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      b1-2 (SGT4) - b2-6 (SGT3) Always Below 1 Ω
      b1-2 (SGT4) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  6. 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 7 

      OK: END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE) 

  7. CHECK FRONT DOOR OUTSIDE HANDLE LH (OPERATION) 
    1. Replace the front door outside handle LH 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 (FRONT DOOR OUTSIDE HANDLE LH 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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