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

DTC Code DTC Name
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 unlock switch (connection between the back door opener switch assembly and certification ECU [smart key ECU assembly]).

WIRING DIAGRAM

B341296E02

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 (Click here). Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle 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 the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. 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 the 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 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 hereClick here

    Result

    Proceed to

    Door locks operate normally

    Door locks do not operate
    Door locks do not operate

    GO TO POWER DOOR LOCK CONTROL SYSTEM

    Click here

    Door locks operate normally

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

    1. Connect the GTS to the DLC3.

    2. Turn the power 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, OFF

      Customization status displayed

      -

      Body Electrical > Entry&Start > Data List

      Tester Display

      B-Dr Opening Operation

    Result

    Proceed to

    Customize setting is Long or Twice

    Customize setting is OFF
    Customize setting is OFF

    PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters)

    Click hereClick here

    Customize setting is Long or Twice

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

    1. 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 (unlock switch)

      ON or OFF

      ON: Back door opener switch (unlock switch) pushed

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

      • Displays whether the back door opener 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.

      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)

    1. Disconnect the U7 back door opener switch assembly connector.

    2. Disconnect the G83 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

      U7-3 (UL) - G83-27 (TSW5)

      Always

      Below 1 Ω

      U7-2 (E) - Body ground

      Always

      Below 1 Ω

      U7-3 (UL) or G83-27 (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 (UNLOCK SWITCH)

    1. B142645N71

      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

      Condition

      Specified Condition

      3 (UL) - 2 (E)

      No switch pushed

      10 kΩ or higher

      3 (UL) - 2 (E)

      Unlock switch pushed

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY

    Click here