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

DTC Code DTC Name
Driver Side Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION

If the entry lock and unlock functions do not operate for the driver side door only, the request code may not be being transmitted from the driver side door or the front door outside handle assembly LH (touch sensor) may be malfunctioning. 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 front door outside handle assembly LH [driver side electrical key antenna]), or there may be wave interference.

WIRING DIAGRAM

B249951E69

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.

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

  • 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

      FL Door Lock Pos

      Front LH side door lock

      UNLOCK or LOCK

      UNLOCK: Front LH side door unlocked

      LOCK: Front LH side door locked

      -

      OK

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

    Result

    Result

    OK

    NG
    NG

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

    Click here

    OK

  3. CHECK ELECTRICAL KEY ANTENNAS IN KEY DIAGNOSTIC MODE

    1. B250210C03

      *a

      Approximately 0.3 m (0.984 ft.)

      Bring the electrical key transmitter approximately 0.3 m (0.984 ft.) from the front door outside handle LH and perform an entry function check

      Click here

      CAUTION:

      If the electrical key transmitter is brought within 0.2 m (0.656 ft.) of the door handle, communication may not be possible.

      Tip:

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

    Result

    Result

    Proceed to

    Entry function does not operate normally.

    A

    Entry function operates normally.

    B
    B

    AFFECTED BY WAVE INTERFERENCE

    A

  4. CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE LH - CERTIFICATION ECU)

    1. Disconnect the O1 front door outside handle assembly LH connector.

    2. Disconnect the G26 certification ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      O1-3 (ANT2) - G26-4 (CG1B)

      Always

      Below 1 Ω

      O1-6 (ANT1) - G26-3 (CLG1)

      Always

      Below 1 Ω

      O1-5 (B) - G26-32 (POS1)

      Always

      Below 1 Ω

      O1-2 (GND) - Body ground

      Always

      Below 1 Ω

      O1-3 (ANT2) or G26-4 (CG1B) - Body ground

      Always

      10 kΩ or higher

      O1-6 (ANT1) or G26-3 (CLG1) - Body ground

      Always

      10 kΩ or higher

      O1-5 (B) or G26-32 (POS1) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. PERFORM ACTIVE TEST USING CERTIFICATION ECU (OUTPUT TO DRIVER SIDE ELECTRICAL KEY ANTENNA)

    1. B250975C01

      *1

      Waveform

      *a

      Front view of wire harness connector

      (to Front Door Outside Handle Assembly LH)

      Disconnect the O1 front door outside handle assembly LH connector.

    2. Connect the G26 certification ECU connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      O1-5 (B) - Body ground

      Engine switch off → on (IG)

      9 to 12 V → Below 2 V

    4. Using an oscilloscope, check the waveform.

      OK

      Tester Connection

      Switch Condition

      Tool Setting

      Specified Condition

      O1-3 (ANT2) - O1-6 (ANT1)

      Procedure:

      1. Engine switch off

      2. Key brought outside vehicle

      3. All doors closed

      4. Key not inside vehicle

      5. All doors locked through wireless operation

      2 V/DIV., 500 ms/DIV.

      Pulse generation (See waveform)

    Result

    Result

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU

    OK

  6. REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY LH

    1. Temporarily replace the front door outside handle assembly LH with a new or normally functioning one

      Click here

    Result

    Result

    NEXT
    NEXT

  7. CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (OPERATION)

    1. Check that the entry functions operate normally

      Click here

      OK

      Entry functions operate normally.

    Result

    Result

    OK

    NG
    OK

    END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY LH IS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU