WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart 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

A01EYFIE08

INSPECTION PROCEDURE

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.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (ANSWER-BACK OPERATION)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Utility / Customize / Wireless Door Lock.

    5. Select the setting by referring to the table below.

      Display Default Content Setting Relevant ECU
      Hazard Answer Back ON

      When the doors are locked by wireless operation, the hazard warning lights flash once.

      When the doors are unlocked by wireless operation, the hazard warning lights flash twice.

      		 OFF or ON Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Resp* ON Wireless door lock buzzer response OFF or ON Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Vol* Level 5 Wireless door lock buzzer volume Level 7, Level 6, Level 5, Level 4, Level 3, Level 2, Level 1 or Level 0 Main body ECU (Multiplex network body ECU)

      • *: w/ Wireless Door Lock Buzzer Answer Back Function

      Result
      Result Proceed to
      Both items are ON and except Level 0 A
      Either item is OFF or Level 0 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 module sub-assembly.

      Result
      Result Proceed to
      Wireless door lock/unlock operates normally. A
      Wireless door lock/unlock does not operate normally. B

    B

    GO TO PROBLEM SYMPTOMS TABLE Click here

    A

  3. READ VALUE USING INTELLIGENT TESTER (DOOR UNLOCK DETECTION SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Main Body (Main Body ECU (Multiplex Network Body ECU))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Door Lock Pos Front door RH unlock detection switch signal/LOCK or UNLOCK

      LOCK: Front door RH locked

      UNLOCK: Front door RH unlocked

      		 -
      FL Door Lock Pos Front door LH unlock detection switch signal/LOCK or UNLOCK

      LOCK: Front door LH locked

      UNLOCK: Front door LH unlocked

      		 -
      RR-Door Lock Pos SW*1 Rear door RH and LH unlock detection switch signal/ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      		 -
      RL-Door Lock Pos SW*2 Rear door RH and LH unlock detection switch signal/ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      		 -

      • *1: When checking RR- Door Lock Pos SW, make sure to check it with the rear door LH locked.

      • *2: When checking RL- Door Lock Pos SW, make sure to check it with the rear door RH locked.

      OK
      The intelligent tester should display as shown in the table according to door lock operation.
      Result
      Result Proceed to
      OK A
      NG (for Driver door) B
      NG (for Front Passenger door) C
      NG (for Rear LH door) D
      NG (for Rear RH door) E

    B

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

    C

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

    D

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

    E

    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 module sub-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

    HAZARD WARNING LIGHTS OPERATION Click here

    A

  5. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (WIRELESS DOOR LOCK BUZZER)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Active Test.

    5. Perform the Active Test according to the display on the intelligent tester.

      Main Body (Main Body ECU (Multiplex Network Body ECU))
      Tester Display Test Part Control Range Diagnostic Note
      Wireless Buzzer Turns the wireless door lock buzzer OFF/ON -
      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 - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the A15 wireless door lock buzzer and 3D instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-1 - 3D-22 Always Below 1 Ω
      A15-2 - Body ground Always Below 1 Ω
      A15-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

      A01EXYVE18
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3D-22 - MB-21 (BZR) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  8. REPLACE WIRELESS DOOR LOCK BUZZER


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


    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.

    NG

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

    OK

    END (WIRELESS DOOR LOCK BUZZER WAS DEFECTIVE)

  10. 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.

    NG

    GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit) Click here

    OK

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