ENTRY AND START SYSTEM(for Entry Function) Back Door Entry Lock Function does not Operate

DESCRIPTION

If the entry lock function does not operate for the back door only, but the entry unlock function operates, the request code is being transmitted properly from the back door. In this case, there may be a problem related to the lock switch (connection between the back door electrical key switch and certification ECU (smart key ECU assembly)).

WIRING DIAGRAM

A004EWPE06

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle 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 the 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.

  • 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) precaution 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. When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation Click here.

      OK
      Door unlocks operate normally.

    NG

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

    OK

  2. READ VALUE USING GTS (TR/B-DOOR LOCK SW)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry & Start / Data List.

    5. According to the display on the GTS, read the Data List.

      Entry & Start
      Tester Display Measurement Item/Display Normal Condition Diagnostic Note
      Tr/B-Door Lock SW Back door opener switch assembly (lock switch) / OFF or ON

      OFF: Back door opener switch (lock switch) not pushed

      ON: Back door opener switch assembly (lock switch) pushed

      • Displays whether the back door electrical key switch (lock switch) is on or off.

      • Use this Data List item to help determine if there is a switch malfunction when the back door lock function does not operate.
      OK
      On the GTS screen, the display changes between ON and OFF as shown in the table above.

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - BACK DOOR OPENER SWITCH AND BODY GROUND)


    1. Disconnect the F87 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the P6 back door opener switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F87-28 (TSW6) - P6-1 (L) Always Below 1 Ω
      F87-28 (TSW6) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


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


    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here