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

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DTC Code DTC Name
  Back Door Entry Lock Function does not Operate
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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)).

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WIRING DIAGRAM

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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.

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PROCEDURE


  1. Click here

    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.

    • OKClick here
    • NG

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

  2. Click here

    READ VALUE USING INTELLIGENT TESTER (TR/B-DOOR LOCK SW)


    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 / Entry & Start / Data List.

    5. According to the display on the intelligent tester, read the Data List.

      Table 1. 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 intelligent tester screen, the display changes between ON and OFF as shown in the table above.

    • OK

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    • NGClick here
  3. Click here

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


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

    2. Disconnect the P8 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
      F64-28 (TSW6) - P8-1 (L) Always Below 1 Ω
      F64-28 (TSW6) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    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)