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) and electrical key transmitter sub-assembly, wave interference or a malfunction in the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

A0020Q4E33
*a Certification ECU (Smart Key ECU Assembly)
*b No. 1 Indoor Electrical Key Antenna Assembly (Inside Luggage)

CAUTION / NOTICE / HINT

Note


  • 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

  • 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(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 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 LUGGAGE COMPARTMENT OPEN OPERATION


    1. Connect all connectors and check that the entry luggage compartment open function operates.

      Click here

      Result
      Result Proceed to
      Luggage open function operates normally A
      Luggage 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. A0022OTC01
      *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.

      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


    1. Check the following antenna in key diagnostic mode.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)
    2. A0022OTC01
      *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):

        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. 1 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.

      Result
      Result Proceed to
      Wireless buzzer does not sound A
      Wireless 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))


    1. Disconnect the K7 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the Q3 No. 1 indoor electrical key antenna assembly (inside luggage) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K7-8 (CLG7) - Q3-1 (ANTE7) Always Below 1 Ω
      K7-7 (CG7B) - Q3-3 (CLGB) Always Below 1 Ω
      K7-8 (CLG7) or Q3-1 (ANTE7) - Body ground Always 10 kΩ or higher
      K7-7 (CG7B) or Q3-3 (CLGB) - Body ground Always 10 kΩ or higher

    4. Reconnect the K7 certification ECU (smart key ECU assembly) connector.

      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))


    1. A0020WKC03
      *a

      Front view of wire harness connector

      (to No. 1 Indoor Electrical Key Antenna Assembly (Inside Luggage))
      *b Waveform 1
      *c Driver door lock sensor not touched
      *d Driver door lock sensor touched

      Using an oscilloscope, check the wave form.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      Q3-1 (ANTE7) - Q3-3 (CLGB)

      Procedure:


      1. Door is closed

      2. Power switch off

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Driver door lock sensor touched

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform 1)
      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. Replace the No. 1 indoor electrical key antenna assembly (inside luggage).

      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) WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)