WIRELESS DOOR LOCK CONTROL SYSTEM(w/ Entry and Start System) No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning light and/or wireless door lock buzzer answer-back function(s)* does not operate. In such cases, hazard warning light and wireless door lock buzzer* signal outputs from the main body ECU (multiplex network body ECU) may be malfunctioning.


WIRING DIAGRAM

B001CHXE43

CAUTION / NOTICE / HINT

Note


  • The wireless door lock control system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

PROCEDURE


  1. CUSTOMIOZE SETTING


    1. Check the customize status of answer-back function has been default setting.

      Click here

      Result
      Result Proceed to
      The customize status of answer-back function has been default setting. A
      The customize status of answer-back function has not been default setting. B

    B

    PERFORM CUSTOMIZE FUNCTION Click here

    A

  2. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS


    1. Check the wireless door lock control function using the door control transmitter assembly.

      Result
      Result Proceed to
      Wireless door lock/unlock operates normally. A
      Wireless door lock/unlock operates normally. B

    B

    GO TO PROBLEM SYMPTOMS TABLE Click here

    A

  3. READ VALUE USING GTS (FL Door Lock Pos, FR Door Lock Pos, RL-Door Lock Pos SW, RR-Door Lock Pos SW, Back Door Lock Pos 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 / Main Body / Data List.

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

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FL Door Lock Pos Front LH side door lock position switch signal / UNLOCK or LOCK

      UNLOCK: Front LH side door unlocked

      LOCK: Front LH side door locked

      		 -
      FR Door Lock Pos Front RH side door lock position switch signal / UNLOCK or LOCK

      UNLOCK: Front RH side door unlocked

      LOCK: Front RH side door locked

      		 -
      RL-Door Lock Pos SW* Rear LH side door lock position switch signal / ON or OFF

      ON: Rear LH side door unlocked

      OFF: Rear LH side door locked

      		 -
      RR-Door Lock Pos SW* Rear RH side door lock position switch signal / ON or OFF

      ON: Rear RH side door unlocked

      OFF: Rear RH side door locked

      		 -
      Back Door Lock Pos SW Back door lock position switch status / ON or OFF

      ON: Back door unlocked

      OFF: Back door locked

      		 -

      • *: for 5 Door

      OK
      The GTS should display as shown in the table according to door lock operation.
      Result
      Result Proceed to
      OK A
      NG B

    B

    GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) Click here

    A

  4. CHECK WIRELESS ANSWER-BACK OPERATION


    1. Check the wireless answer-back operation using the door control transmitter assembly.

      Result
      Result Proceed to
      Only wireless door lock buzzer answer-back does not occur.* A
      Only hazard warning light answer-back does not occur. B

      • *: w/ Wireless Door Lock Buzzer Answer-back Function


    B

    CHECK HAZARD WARNING LIGHTS OPERATION Click here

    A

  5. PERFORM ACTIVE TEST USING GTS (Wireless Buzzer)


    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 / Main Body / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Wireless Buzzer Wireless door lock buzzer ON/OFF -
      Result
      Result Proceed to
      Wireless door lock buzzer does not turn on/off. A
      Wireless door lock buzzer turns on/off. B

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    A

  6. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the A39 wireless door lock buzzer connector.

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

    3. Connect the driver side junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-1 (B) - A-21 (BZR) Always Below 1 Ω
      A39-2 (E) - Body ground Always Below 1 Ω
      A39-1 (B) or A-21 (BZR) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  7. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the A39 wireless door lock buzzer connector.

    2. Disconnect the 2M driver side junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-1 (B) - 2M-30 Always Below 1 Ω
      A39-2 (E) - Body ground Always Below 1 Ω
      A39-1 (B) or 2M-30 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  8. REPLACE WIRELESS DOOR LOCK BUZZER


    1. Temporarily replace the wireless door lock buzzer with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK WIRELESS DOOR LOCK BUZZER OPERATION


    1. Check the operation of the wireless answer-back function.

      OK
      Wireless answer-back function operates normally.
      Result
      Result Proceed to
      OK A
      NG B

    A

    END (WIRELESS DOOR LOCK BUZZER WAS DEFECTIVE)

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  10. CHECK HAZARD WARNING LIGHTS OPERATION


    1. Check that the hazard warning light blinks when the hazard warning signal switch is pressed.

      OK
      Hazard warning light signal is normally.
      Result
      Result Proceed to
      OK A
      NG B

    A

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    B

    GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit) for Halogen Headlight: Click here for LED Headlight: Click here