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

DESCRIPTION

If the entry unlock function does not operate for the back door only, but the entry lock function operates, the request code is being transmitted properly from the back door. In this case, there may be a problem related to the open switch (connection between the back door opener switch assembly and certification ECU (smart key ECU assembly)).

WIRING DIAGRAM

B005B7UE08

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

    Click here

  • When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

  • Before replacing the certification ECU (smart key ECU assembly), refer to entry and start system (for Entry Function) Precaution.

    Click here

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE


  1. CHECK POWER DOOR LOCK CONTROL SYSTEM


    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.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

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


    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.


      Body Electrical > Entry&Start > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      B-Dr Opening Operation Back door opening operation Long, Twice or OFF Customize setting displayed -

      Body Electrical > Entry&Start > Data List
      Tester Display
      B-Dr Opening Operation
      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

  3. READ VALUE USING GTS (TR/B DOOR UNLOCK SW)


    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.


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

      ON: Back door opener switch assembly (open switch) pressed

      OFF: Back door opener switch assembly (open switch) not pressed

      • Displays whether the back door opener switch assembly (open switch) is on or off.

      • Use this Data List item to help determine if there is a switch malfunction when the back door open function does not operate.

      Body Electrical > Entry&Start > Data List
      Tester Display
      Tr/B-Door Unlock SW
      OK
      The GTS display changes correctly in response to the operation of the back door opener switch assembly.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

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


    1. Disconnect the Y7 back door opener switch assembly connector.

    2. Disconnect the I52 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
      Y7-3 (UL) - I52-5 (TSW5) Always Below 1 Ω
      Y7-3 (UL) or I52-5 (TSW5) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (OPEN SWITCH)


    1. Remove the back door opener switch assembly.

      Click here

    2. Inspect the back door opener switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here