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

DESCRIPTION

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

WIRING DIAGRAM

B0049VZE33

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power 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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical /Entry&Start. 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.

  • The entry and start system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function 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

  • Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.

  • 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

  • After repair, confirm that no DTCs are output.

    Click here

PROCEDURE


  1. CHECK ENTRY LUGGAGE COMPARTMENT DOOR OPEN OPERATION


    1. Check that the entry luggage compartment door open function operates.

      Click here

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

    B

    GO TO OTHER PROBLEM (Proceed to Luggage Compartment Door Entry Unlock Function does not Operate when Key is Outside Luggage Compartment) Click here

    A

  2. CHECK WAVE ENVIRONMENT


    1. B004AY3C01
      *a Inspection Point

      Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (inside luggage compartment), 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 compartment).

      • When the electrical key transmitter sub-assembly is brought near the No. 1 indoor electrical key antenna assembly (inside luggage compartment), 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.

      Result
      Result Proceed to
      Entry functions does not operate normally A
      Entry functions operate normally B

    B

    AFFECTED BY WAVE INTERFERENCE

    A

  3. CHECK KEY DIAGNOSTIC MODE

    Note

    Perform the inspection with all of the windows fully opened.


    1. Check the following antenna in key diagnostic mode.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)
    2. B004AY3C01
      *a Inspection Point

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


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

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

        Tech Tips


        • If the buzzer sounds, it can be determined that the No. 1 indoor electrical key antenna assembly (inside luggage compartment) 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.

      Result
      Result Proceed to
      Buzzer does not sound A
      Buzzer sounds B

    B

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

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


    1. Disconnect the X23 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the b1 No. 1 indoor electrical key antenna assembly (inside luggage compartment) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X23-11 (CLG7) - b1-1 (ANTE7) Always Below 1 Ω
      X23-10 (CG7B) - b1-3 (CLGB) Always Below 1 Ω
      X23-11 (CLG7) or b1-1 (ANTE7) - Other terminals and body ground Always 10 kΩ or higher
      X23-10 (CG7B) or b1-3 (CLGB) - Other terminals and 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) (OUTPUT TO NO.1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT))


    1. Reconnect the X23 certification ECU (smart key ECU assembly) connector.

    2. B004A2PC02
      *a

      Front view of wire harness connector

      (to No. 1 Indoor Electrical Key Antenna Assembly (Inside Luggage Compartment))
      *b Waveform
      *c Driver door outside handle back end not pressed
      *d Driver door outside handle back end pressed

      Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      b1-1 (ANTE7) - b1-3 (CLGB)

      Procedure:


      1. All doors closed

      2. Power switch off

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Driver door outside handle back end not pressed → pressed

      		 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 COMPARTMENT)


    1. Replace the No. 1 indoor electrical key antenna assembly (inside luggage compartment) with any of following parts.


      • New or known good No. 1 indoor electrical key antenna assembly (inside luggage compartment):

        Click here

      • Known good No. 1 indoor electrical key antenna assembly (front floor):

        Click here

      • Known good No. 1 indoor electrical key antenna assembly (rear floor):

        Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK KEY LOCK-IN PREVENTION FUNCTION


    1. Check that the entry luggage compartment lock-in prevention function operates normally.

      Click here

      OK
      Entry luggage compartment lock-in prevention function operates normally.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)