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

DESCRIPTION

If the back door entry unlock function does not operate but the back door lock function operates, the communication between the vehicle and electrical key transmitter is normal. The malfunctioning part may be the entry unlock switch circuit (certification ECU (smart key ECU assembly) and back door opener switch assembly (unlock switch)).

WIRING DIAGRAM

A005ICOE03

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for entry function) uses a multiplex communication system (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.

  • 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 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".

Tech Tips

Check that the entry cancel function, which is one of the customizing settings of the entry and start system, is not set Click here.

PROCEDURE


  1. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. When the door control switch on the master switch assembly is operated, check that the doors lock according to switch operation Click here.

      OK
      Door locks operate normally.

    NG

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

    OK

  2. READ VALUE USING INTELLIGENT TESTER (B-DR OPENING OPERATION)


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

      Entry & Start
      Display Default Content Setting
      B-Dr Opening Operation Back door opening operation / Long, Twice or OFF Customization status displayed -
      Result
      Result Proceed to
      Back door opening operation is Long or Twice A
      Back door opening operation is OFF B

    B

    PERFORM CUSTOMIZE SETTING (PROCEED TO CUSTOMIZE PARAMETERS) Click here

    A

  3. READ VALUE USING INTELLIGENT TESTER (TR/B-DOOR UNLOCK 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. Read the Data List according to the display on the intelligent tester.

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

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

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

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

      • Use this Data List item to help determine if there is a switch malfunction when the back door unlock 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)

    NG

  4. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - CERTIFICATION ECU 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 (Check for Open)
      Tester Connection Condition Specified Condition
      F64-27 (TSW5) - P8-3 (UL) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F64-27 (TSW5) - Body ground Always 10 kΩ or higher
      P8-3 (UL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


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

    2. 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