ENTRY AND START SYSTEM(for Entry Function) Key Luggage Compartment Lock-in Prevention Function does not Operate

DESCRIPTION

If the key lock-in prevention function does not operate, there may be a problem with communication between the No. 1 indoor electrical key antenna assembly (inside luggage) and electrical key transmitter sub-assembly, wave interference or a malfunction in the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

A01LV5SE29

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for Entry Function) uses the CAN communication system and LIN communication system. First inspect the communication systems by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

    Click here

    Click here

  • When using the GTS with the vehicle engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly), refer to entry and start system (for Entry Function) Precaution.

    Click here

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE


  1. CHECK ENTRY FUNCTION (ENTRY LUGGAGE DOOR OPEN FUNCTION)


    1. Check that the luggage door open function operates.

      Click here

      Result
      Result Proceed to
      Luggage door open function operates A
      Luggage door open open function does not operate B

    B

    GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table) Click here

    A

  2. CHECK WAVE ENVIRONMENT


    1. A01M27AC01
      *a Inspection Point

      Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (inside luggage), and check that the entry luggage compartment lock-in prevention function operates.

      Note

      In order to prevent the electrical key transmitter sub-assembly from being locked inside the vehicle, perform this inspection with the window of a door open.

      Tech Tips


      • Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (inside luggage).

      • When the electrical key transmitter sub-assembly is brought near the No. 1 indoor electrical key antenna assembly (inside luggage), the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.

      • If 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.

      • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.

      • If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

      OK
      Entry functions operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  3. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antenna in key diagnostic mode.

      Click here


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)
    2. A01M27AC01
      *a Inspection Point

      Select either channel 1 or channel 2 and inspect using the key diagnostic mode for each channel.


      1. Check the No. 1 indoor electrical key antenna assembly (inside luggage):

        When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

        Tech Tips


        • If the buzzer sounds, it can be determined that the No. 3 indoor electrical key antenna assembly (inside luggage) is operating normally.

        • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

        OK
        Wireless door lock buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY)


    1. Disconnect the E34 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the M2*1 or L85*2 No. 1 indoor electrical key antenna assembly (inside luggage) connector.


      • *1: except Sedan

      • *2: for Sedan

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      except Sedan
      Tester Connection Condition Specified Condition
      E34-9 (CLG7) - M2-1 (ANTE7) Always Below 1 Ω
      E34-8 (CG7B) -M2-3 (CLGB) Always Below 1 Ω
      E34-9 (CLG7) or M2-1 (ANTE7) - Body ground Always 10 kΩ or higher
      E34-8 (CG7B) or M2-3 (CLGB) - Body ground Always 10 kΩ or higher
      Standard Resistance
      for Sedan
      Tester Connection Condition Specified Condition
      E34-9 (CLG7) - L85-1 (ANTE7) Always Below 1 Ω
      E34-8 (CG7B) -L85-3 (CLGB) Always Below 1 Ω
      E34-9 (CLG7) or L85-1 (ANTE7) - Body ground Always 10 kΩ or higher
      E34-8 (CG7B) or L85-3 (CLGB) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Connect the E34 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the the M2*1 or L85*2 NO. 1 indoor electrical key antenna assembly (inside luggage) connector.


      • *1: except Sedan

      • *2: for Sedan

    3. A01LV8AC24
      *A except Sedan
      *B for Sedan
      *a

      Front view of wire harness connector

      (to NO. 1 Indoor Electrical Key Antenna (Inside Luggage))
      *b Waveform
      *c Before driver door lock sensor touched
      *d After driver door lock sensor touched

      Using an oscilloscope, check the waveform.

      OK
      except Sedan
      Tester Connection Switch Condition Tool Setting Specified Condition
      M2-1 (ANTE7) - M2-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. All doors closed

      4. Driver door lock sensor not touched → touched

      		 2 V/DIV., 500 ms/DIV. Pulse generation (See waveform)
      OK
      for Sedan
      Tester Connection Switch Condition Tool Setting Specified Condition
      L85-1 (ANTE7) - L85-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. All doors closed

      4. Driver door lock sensor not touched → touched

      		 2 V/DIV., 500 ms/DIV. Pulse generation (See waveform)
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  6. REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)


    1. Temporarily replace the No. 1 indoor electrical key antenna assembly (inside luggage) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)


    1. Check that the key lock-in prevention function operates normally.

      Click here

      OK
      Key lock-in prevention function operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE) WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)