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Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Access System (For Entry) - Diagnostic Codes & Symptom Tests (1 Of 2) >> Smart Access System With Push-Button Start (For Entry Function) >> Driver Side Door Entry Unlock Function Does Not Operate [04/2013 - ] >> Procedure
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Driver Side Door Entry Unlock Function Does Not Operate [04/2013 - ]: Procedure

  1. Check Power Door Lock Control System 
    1. When The Door Control Switch On The Multiplex Network Master Switch Assembly Is Operated, Check That The Doors Unlock And Lock According To The Switch Operation.

      Refer To Operation Check [04/2013 - ]

      Ok

      Door Locks Operate Normally.

      Result

      Proceed To
      Ok
      Ng

    Result: 

    Ng 

    Go To Power Door Lock Control System. Refer To  How To Proceed With Troubleshooting [04/2013 - ] 

    Result: 

    Ok 

    See Step  2

  2. Read Value Using Techstream (Fl Door Lock Pos) 
    1. Connect The Techstream To The Dlc3.
    2. Turn The Engine Switch On (Ig).
    3. Turn The Techstream On.
    4. Enter The Following Menus: Body Electrical / Main Body / Data List.
    5. Read The Data List According To The Display On The Techstream.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Fl Door Lock Pos Front Door Lh Unlock Detection Switch Signal Unlock Or Lock Unlock: Front Door Lh Unlocked
      Lock: Front Door Lh Locked      		 -

      Body Electrical > Main Body > Data List 

      Tester Display
      Fl Door Lock Pos

      Ok

      The Techstream Display Changes Correctly In Response To The Lock/Unlock Operation Of The Front Lh Door.

      Result

      Proceed To
      Ok
      Ng

    Result: 

    Ng 

    Go To Lighting System (Proceed To Door Unlock Detection Switch Circuit). Refer To  Door Unlock Detection Switch Circuit [04/2013 - ] 

    Result: 

    Ok 

    See Step  3

  3. Read Value Using Techstream (D-Door Touch Sensor) 
    1. Connect The Techstream To The Dlc3.
    2. Turn The Engine Switch On (Ig)
    3. Turn The Techstream On.
    4. Enter The Following Menus: Body Electrical / Smart Access / Data List.
    5. Read The Data List According To The Display On The Techstream.

      Body Electrical > Smart Access > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      D-Door Touch Sensor Driver Door Touch Sensor (Unlock Sensor) On Or Off On: Driver Door Touch Sensor (Unlock Sensor) Touched
      Off: Driver Door Touch Sensor (Unlock Sensor) Not Touched
      • Displays Whether The Unlock Sensor Is On Or Off (Even If The Sensor Is Touched And Contact Is Maintained, "On" Is Displayed Only Momentarily).
      • Use This Data List Item To Help Determine If There Is An Unlock Sensor Malfunction When The Entry Unlock Function Does Not Operate.

      Body Electrical > Smart Access > Data List 

      Tester Display
      D-Door Touch Sensor

      Ok

      The Techstream Display Changes Correctly In Response To The Operation Of The Front Door Outside Handle Assembly (For Driver Door).

      Result

      Proceed To
      Ok
      Ng

    Result: 

    Ok 

    Replace Certification Ecu (Smart Key Ecu Assembly). Refer To  Removal [04/2013 - 08/2015]  , or refer to  Removal [08/2015 - 09/2020]  , or refer to  Removal [09/2020 - ] 

    Result: 

    Ng 

    See Step  4

  4. Check Harness And Connector (Certification Ecu (Smart Key Ecu Assembly) - Front Door Outside Handle Assembly (For Driver Door)) 
    1. Disconnect The K6 Certification Ecu (Smart Key Ecu Assembly) Connector.
    2. Disconnect The N26 Front Door Outside Handle Assembly (For Driver Door) Connector.
    3. Measure The Resistance According To The Value(S) In The Table Below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K6-4 (Clg1) - N26-6 (Ant1) Always Below 1 Ω
      K6-3 (Cg1B) - N26-4 (Ant2) Always Below 1 Ω
      K6-4 (Clg1) Or N26-6 (Ant1) - Body Ground Always 10 KΩ Or Higher
      K6-3 (Cg1B) Or N26-4 (Ant2) - Body Ground Always 10 KΩ Or Higher
    4. Reconnect The N26 Front Door Outside Handle Assembly (For Driver Door) Connector.
    5. Reconnect The K6 Certification Ecu (Smart Key Ecu Assembly) Connector.

      Result

      Proceed To
      Ok
      Ng

    Result: 

    Ng 

    Repair Or Replace Harness Or Connector 

    Result: 

    Ok 

    See Step  5

  5. Check Front Door Outside Handle Assembly (For Driver Door) (Input To Driver Door Unlock Sensor) 
    GTY460303Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A Component With Harness Connected
    (Certification Ecu (Smart Key Ecu Assembly))    		 *B Waveform 1
    *C Unlock Sensor Not Touched *D Unlock Sensor Touched
    1. Using An Oscilloscope, Check The Waveform.

      Ok

      Tester Connection Condition Tool Setting Specified Condition
      K6-4 (Clg1) - K6-11 (E) Procedure:
      1. Engine Switch Off
      2. Electrical Key Transmitter Sub-Assembly Brought Outside Vehicle
      3. All Doors Locked
      4. Electrical Key Transmitter Sub-Assembly Not Near The Vehicle
      5. Driver Door Unlock Sensor Touched
      		 5 V/Div., 40 Ms/Div. Pulse Generation
      (See Waveform 1)

      Result

      Proceed To
      Ok
      Ng

    Result: 

    Ok 

    Replace Certification Ecu (Smart Key Ecu Assembly). Refer To  Removal [04/2013 - 08/2015]  , or refer to  Removal [08/2015 - 09/2020]  , or refer to  Removal [09/2020 - ] 

    Result: 

    Ng 

    Replace Front Door Outside Handle Assembly (For Driver Door). Refer To  Disassembly [04/2013 - 10/2016]  , or refer to  Disassembly [10/2016 - 09/2020]  , or refer to  Disassembly [09/2020 - ] 

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