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

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DTC Code DTC Name
  Back Door Entry Unlock Function does not Operate
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DESCRIPTION

If the back door entry unlock function does not operate but the back door lock function operates, the communication line between the vehicle and electrical key transmitter is normal. The entry unlock switch circuit (luggage electrical key switch → certification ECU) may be faulty.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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 Service Bulletin.

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PROCEDURE


  1. Click here

    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.

  2. Click here

    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.

      Table 1. Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Lock Pos SW Back door lock position switch status / ON or OFF

      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.

  3. Click here

    READ VALUE USING INTELLIGENT TESTER (UNLOCK SWITCH)


    1. Using the intelligent tester, read the Data List (Click here).

      Table 2. Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Tr/B Door Unlock SW Back door unlock switch / ON or OFF

      ON: Back door unlock switch pushed

      OFF: Back door unlock switch not pushed

      		 -
      OK
      "ON" (unlock switch is pushed) and "OFF" (unlock switch is not pushed) appear on the screen.

  4. Click here

    INSPECT LUGGAGE ELECTRICAL KEY SWITCH (UNLOCK SWITCH)


    1. A01DPH2E13

      Remove the luggage electrical key switch (Click here).

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      5 (UL) - 6 (E) No switch pushed 10 kΩ or higher
      5 (UL) - 6 (E) Unlock switch pushed Below 1 Ω

  5. Click here

    CHECK HARNESS AND CONNECTOR (LUGGAGE ELECTRICAL KEY SWITCH - CERTIFICATION ECU)


    1. Disconnect the X6 switch connector.

    2. Disconnect the G38 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X6-5 (UL) - G38-22 (TSW5) Always Below 1 Ω
      G38-22 (TSW5) - Body ground Always 10 kΩ or higher
      X6-6 (E) - Body ground Always Below 1 Ω

  6. Click here

    GO TO POWER DOOR LOCK CONTROL SYSTEMClick here

  7. Click here

    REPLACE CERTIFICATION ECU

  8. Click here

    REPLACE LUGGAGE ELECTRICAL KEY SWITCHClick here

  9. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

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