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 opener switch assembly and certification ECU (smart key ECU assembly)).

WIRING DIAGRAM

A003X8UE10

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 power 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 replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.

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.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (LOCK SWITCH)


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

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

      ON: Back door opener switch (lock switch) pushed

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

      • Displays whether the back door opener switch assembly (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
      The intelligent tester display changes correctly in response to the operation of the back door opener switch assembly.

    NG

    CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - CERTIFICATION ECU) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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


    1. Disconnect the V4 back door opener switch assembly connector.

    2. Disconnect the H1 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V4-1 (L) - H1-23 (TSW6) Always Below 1 Ω
      V4-2 (E) - Body ground Always Below 1 Ω
      V4-1 (L) or H1-23 (TSW6) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (LOCK SWITCH)


    1. A003YXUE03
      Text in Illustration
      *a

      Component without harness connected

      (Back Door Opener Switch Assembly)

      Remove the back door opener switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 (L) - 2 (E) No switch pushed 10 kΩ or higher
      1 (L) - 2 (E) Lock switch pushed Below 1 Ω

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)