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

DTC Code DTC Name
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 and electrical key antenna [outside luggage]), or there may be electric wave interference.

WIRING DIAGRAM

B249998E11

CAUTION / NOTICE / HINT

Note:

  • The entry and start system (for Entry Function) uses a multiplex communication system (LIN communication system) and the 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 systems are functioning properly.

  • 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.

  • Check that there are no electrical key transmitters 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.

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

  • After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".

PROCEDURE

  1. CHECK POWER DOOR LOCK OPERATION

    1. When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation

      Click here

      OK

      Door locks operate normally.

    Result

    Result

    OK

    NG
    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM

    Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Back Door Lock Pos SW

      Back door lock

      OFF or ON

      ON: Back door unlocked

      OFF: Back door locked

      -

      OK

      On the intelligent tester screen, the display changes between ON and OFF as shown in the chart above.

    Result

    Result

    OK

    NG
    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Back Door Lock/Unlock Functions do not Operate)

    Click here

    OK

  3. CHECK WAVE ENVIRONMENT

    1. B250214C03

      *a

      Approximately 0.3 m (0.98 ft.)

      Bring the electrical key transmitter approximately 0.3 m (0.98 ft.) from the electrical key antenna (outside luggage) and perform an entry back door unlock function check

      Click here

      Note:

      If the key is brought within 0.2 m (0.66 ft.) of the rear bumper, communication may not possible.

      Tip:

      If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of electric wave interference is high. Also, added vehicle components may cause electric wave interference. If installed, remove them and perform the operation check.

      OK

      Entry function operates normally.

    Result

    Result

    OK

    NG
    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  4. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE

    1. Check the following antenna in the key diagnostic mode

      Click here

      1. B250214C04

        *a

        0.7 to 1 m (2.30 to 3.28 ft.)

        Check the electrical key antenna (outside luggage).

        When the electrical key transmitter 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.

    Result

    Result

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU

    NG

  5. CHECK HARNESS AND CONNECTOR (ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)

    1. Disconnect the R19 electrical key antenna (outside luggage) connector.

    2. Disconnect the G27 certification ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      R19-1 (CLG5) - G27-19 (CLG8)

      Always

      Below 1 Ω

      R19-2 (CLGB) - G27-20 (CG8B)

      Always

      Below 1 Ω

      R19-1 (CLG5) or G27-19 (CLG8) - Body ground

      Always

      10 kΩ or higher

      R19-2 (CLGB) or G27-20 (CG8B) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE)

    1. B226391N10

      Remove the electrical key antenna (outside luggage)

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 (CLG5) - 2 (CLGB)

      Always

      Below 1 Ω

    Result

    Result

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU

    NG

    REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE)

    Click here