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Home >> Lexus >> 2016 >> LS 600h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System (Keyless Entry) (Diagnostics & Symptom Tests) >> Smart Access System With Push-Button Start >> Symptom Tests >> Room Oscillator does not Recognize Key [09/2015 - ] >> Procedure

Room Oscillator does not Recognize Key [09/2015 - ]: Procedure

  1. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (ENTRY FUNCTION) 
    1. Check that entry lock and unlock function can be operated at each door (Refer to OPERATION CHECK [09/2015 - ] ).

    Result:  NG

    NG 

    Go to DTC OF OTHER COMPONENTS (PROCEED TO PROBLEM SYMPTOM FLOWCHART FOR EACH DOOR) 

    (Refer to PROBLEM SYMPTOMS TABLE [09/2015 - ] )

    Result:  OK

    OK 

    See step  2

  2. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (START FUNCTION) 
    1. Remove the battery of the electrical key transmitter (Refer to REMOVAL [09/2015 - ] ).
      GTY639212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. With the brake pedal depressed, touch the LEXUS mark of the key to the power switch.
    3. When operating the power switch, check whether the power source mode changes.

      OK

      Power source mode changes.

      HINT: 

      • When the electrical key transmitter cannot be verified even though it is in the start operating range, the hybrid control system start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter against the power switch.
      • When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.

    Result:  NG

    NG 

    Go to SMART ACCESS SYSTEM WITH PUSH-BUTTON START (Power Source Mode does not Change) 

    (Refer to Power Source Mode does not Change [09/2015 - ] )

    Result:  OK

    OK 

    See step  3

  3. CHECK WAVE ENVIRONMENT 
    1. Install the battery to the electrical key transmitter (Refer to REMOVAL [09/2015 - ] ).
    2. Bring the electrical key transmitter near the indoor electrical key oscillator (in center console), and perform a hybrid control system start check.
      NOTE:

      If the key is brought within 0.2 m (0.656 ft.) of the center console, communication is not possible.

    3. Bring the electrical key transmitter near the indoor electrical key oscillator (in rear seat cushion), and perform a hybrid control system start check.
      NOTE:

      If the key is brought within 0.2 m (0.656 ft.) of the rear seat cushion, communication is not possible.

      HINT: 

      • When the electrical key transmitter is brought near the indoor electrical key oscillator, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
      • If the inspection result is that the operation check is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference, If installed, remove them and perform the operation check.

      OK

      Hybrid control system starts.

    Result:  OK

    OK 

    AFFECTED BY WAVE INTERFERENCE 

    Result:  NG

    NG 

    See step  4

  4. KEY DIAGNOSTIC MODE 
    1. Diagnostic mode inspection indoor electrical key oscillator (for Front Floor)
      GTY628738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the Techstream to the DLC3.
      2. Turn the power switch ON (IG).
      3. Turn the Techstream on.
      4. Enter the following menus: Body Electrical / Smart Access / Smart Communication Check /Overhead + Front Room.
      5. When the electrical key transmitter is placed on the driver seat or front passenger seat cushion, check that the wireless door lock buzzer sounds.
    2. Diagnostic mode inspection indoor electrical key oscillator (for Rear Floor)
      GTY681343Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the Techstream to the DLC3.
      2. Turn the power switch ON (IG).
      3. Turn the Techstream on.
      4. Enter the following menus: Body Electrical / Smart Access / Smart Communication Check /Overhead + Rear Room.
      5. When the electrical key transmitter is placed on the rear seat cushion, check that the wireless door lock buzzer sounds.

        HINT: 

        • If the buzzer sounds, it can be determined that the vehicle interior transmitters are operating normally.
        • It is possible to check which indoor electrical key oscillator (front or rear) is operating by sounding the buzzer.
        • If the buzzer does not sound for both indoor electrical key oscillators, the certification ECU circuit may have a malfunction.
        RESULT

        Result Proceed to
        Rear operation check is normal A
        Front operation check is normal B
        Front and rear operation check is normal or fail C

    Result:  B

    B 

    See step  7

    Result:  C

    C 

    REPLACE CERTIFICATION ECU 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  A

    A 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR) 
    GTY629432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L15 ECU connector.
    2. Disconnect the L74 oscillator connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      L74-1 (CLG3) - L15-11 (CLG5) Always Below 1 Ω
      L74-3 (CLGB) - L15-12 (CG5B) Always Below 1 Ω
      L74-1 (CLG3) - Body ground Always 10 kΩ or higher
      L74-3 (CLGB) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  6

  6. CHECK INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor) 
    GTY669495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Tool Setting Condition Specified Condition
      L15-11 (CLG5) - L15-12 (CG5B) 2 V/DIV, 2μs/DIV. (Reference) Power switch ON (IG) Pulse generation

    Result:  OK

    OK 

    REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor) 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPLACE CERTIFICATION ECU 

    (Refer to REMOVAL [09/2015 - ] )

  7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR) 
    GTY654728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L15 ECU connector.
    2. Disconnect the S10 oscillator connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      S10-1 (CLG4) - L15-13 (CLG6) Always Below 1 Ω
      S10-3 (CLGB) - L15-14 (CG6B) Always Below 1 Ω
      S10-1 (CLG4) - Body ground Always 10 kΩ or higher
      S10-3 (CLGB) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  8

  8. CHECK INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor) 
    GTY662401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Tool Setting Condition Specified Condition
      L15-13 (CLG6) - L15-14 (CG6B) 2 V/DIV., 2 μs/DIV. (Reference) Power switch ON (IG) Pulse generation

    Result:  OK

    OK 

    REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor) 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPLACE CERTIFICATION ECU 

    (Refer to REMOVAL [09/2015 - ] )

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