ENTRY AND START SYSTEM(for Entry Function) Back Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION

If the entry lock and unlock functions do not operate for the back door only, the request code may not be being transmitted from the back door. If the entry functions for other doors operate properly, communication between the key and door control receiver is normal. In this case, there may be a problem with request code transmission (communication between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage)), or there may be electric wave interference.

WIRING DIAGRAM

A01VKEUE04

CAUTION / NOTICE / HINT

Note


  • When using the intelligent tester with the engine switch off to troubleshoot:

    Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.

  • The entry and start system (for Entry Function) uses a LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication system is functioning properly.

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

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

  • When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations depending on the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


    1. Check that the doors unlock when the door control switch on the power window regulator master switch assembly is operated, and that the back door unlatches when the open switch is pushed Click here.

      OK
      Back door unlatches normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM (PROCEED TO PROBLEM SYMPTOMS TABLE) Click here

    OK

  2. CHECK WAVE ENVIRONMENT


    1. A01VK8JE01
      Text in Illustration
      *a Vehicle center
      *b Approximately 0.3 m (0.98 ft.)

      Bring the electrical key transmitter sub-assembly near the electrical key antenna (outside luggage), and perform an entry back door open and entry lock functions check.

      Note

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

      Tech Tips


      • When the electrical key transmitter sub-assembly is brought near the electrical key antenna, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.

      • If the operation 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.

      OK
      Entry functions operate normally.

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  3. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. Inspect the back door opener switch assembly Click here.


    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - BODY GROUND)


    1. Disconnect the P8 electrical key antenna (outside luggage) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P8-2 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antennas in the key diagnostic mode Click here.


      1. A01VH6ZE01
        Text in Illustration
        *a Vehicle center
        *b 0.7 to 1.0 m (2.30 to 3.28 ft.)

        Check the electrical key antenna (outside luggage):

        When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage), check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE))


    1. Disconnect the F64 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the K13 electrical key antenna (outside luggage) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-2 (CLG8) - K13-3 (CLG5) Always Below 1 Ω
      F64-1 (CG8B) - K13-4 (CLGB) Always Below 1 Ω
      F64-2 (CLG8) - Body ground Always 10 kΩ or higher
      F64-1 (CG8B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE)


    1. Temporarily replace the electrical key antenna (outside luggage) with a new or known good one Click here.


    NEXT

  8. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antennas in the key diagnostic mode Click here.


      1. A01VH6ZE01
        Text in Illustration
        *a Vehicle center
        *b 0.7 to 1.0 m (2.30 to 3.28 ft.)

        Check the electrical key antenna (outside luggage):

        When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage), check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.

    OK

    END (ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE))

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)