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

DESCRIPTION

If the entry back door open function does not operate but the back door entry lock function operates, the communication between the vehicle and key is normal. As a faulty part, the back door open switch circuit (from the back door opener switch assembly (opener switch) to the certification ECU (smart key ECU assembly)) is suspected.

WIRING DIAGRAM

A01EKRWE04

INSPECTION PROCEDURE

Note


  • The smart 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 smart entry and start system (for entry function) after confirming that the communication system is functioning properly.

  • Confirm that another key is not in the cabin.

  • Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS (ENTRY BACK DOOR OPEN FUNCTION)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the Data List according to the display on the GTS.

      Entry&Start (Certification ECU (Smart Key ECU Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      B-Dr Opening Operation Back door opening operation / Long, Twice, OFF Customization status displayed -
      Result
      Result Proceed to
      Customize setting is Long or Twice. A
      Customize setting is OFF. B

    B

    PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters) Click here

    A

  2. CHECK POWER DOOR LOCK CONTROL SYSTEM


    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 locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) Click here

    OK

  3. READ VALUE USING GTS (BACK DOOR OPENER SWITCH)


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

    2. Read the Data List according to the display on the GTS.

      Entry&Start (Certification ECU (Smart Key ECU Assembly))
      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

      		 -
      OK
      On the GTS screen, the display changes between ON and OFF as shown in the chart above.

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  4. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. A01EKFUE01
      Text in Illustration
      *1

      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 Position Specified Condition
      2 (E) - 3 (UL) Back door opener switch assembly (opener switch) not pushed (OFF) 10 kΩ or higher
      2 (E) - 3 (UL) Back door opener switch assembly (opener switch) pushed (ON) Below 1 Ω

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

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


    1. A01EJ8WE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))
      *2

      Front view of wire harness connector

      (to Back Door Opener Switch Assembly)

      Disconnect the certification ECU (smart key ECU Assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D25-22 (TSW5) - R13-3 (UL) Always Below 1 Ω
      D25-22 (TSW5) - Body ground Always 10 kΩ or higher
      R13-3 (UL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)