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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 >> Front Passenger 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.

      Passenger Door (Front door ECU RH) 

      PASSENGER DOOR (FRONT DOOR ECU RH) DATA LIST REFERENCE

      Tester Display Measurement Item/Display Normal Condition Diagnostic Note
      Entry Sensor Front passenger side door touch sensor /ON or OFF ON: Front passenger side door sensor is touched
      OFF: Front passenger 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 RH (OPERATION) 
    1. Replace the front door ECU RH 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 RH IS DEFECTIVE) 

  4. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - FRONT DOOR ECU RH) 
    Fig 1: Identifying N1 ECU Connector And A1 Oscillator Connector Terminals
    G04951638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N1 ECU connector.
    2. Disconnect the a1 oscillator connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      N1-15 (SEL) - a1-4 (SEL) Always Below 1 Ω
      N1-15 (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 RH) 
    Fig 2: Identifying A1 Oscillator Connector And A2 Handle Connector Terminals
    G04951639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the a1 oscillator connector.
    2. Disconnect the a2 handle connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      a1-2 (SGT1) - a2-6 (SGT1) Always Below 1 Ω
      a1-2 (SGT1) - 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 RH (OPERATION) 
    1. Replace the front door outside handle RH 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 RH IS DEFECTIVE) 

  8. CHECK FRONT DOOR ECU RH (OPERATION) 
    1. Replace the front door ECU RH 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 RH IS DEFECTIVE)