WIRELESS DOOR LOCK CONTROL 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, the hazard warning light and wireless door lock buzzer signals output from the main body ECU (multiplex network body ECU) may be malfunctioning.

WIRING DIAGRAM

A0042CDE04

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS (ANSWER-BACK 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: Customize Setting / Wireless Door Lock.

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

      Wireless Door Lock Control System
      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.

      		 ON or OFF Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Resp* ON Wireless door lock buzzer response / ON or OFF ON or OFF Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Vol Level 7 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 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 by the electrical key transmitter 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 ENTRY AND START SYSTEM Click here

    A

  3. READ VALUE USING GTS (DOOR LOCK POSITION SWITCH)


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

      LOCK: Front passenger side door locked

      UNLOCK: Front passenger side door unlocked

      		 -
      FL Door Lock Pos Driver door lock position switch signal/LOCK or UNLOCK

      LOCK: Driver door locked

      UNLOCK: Driver door 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 GTS 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 by wireless door lock control function.

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

    B

    PERFORM ACTIVE TEST USING GTS (WIRELESS DOOR LOCK BUZZER) Click here

    A

  5. CHECK HAZARD WARNING LIGHT OPERATION


    1. Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.

      OK
      Hazard warning lights flash continuously.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  6. PERFORM ACTIVE TEST USING GTS


    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 / 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
      Hazard Turn signal flasher relay OFF/ON Observe headlights and rear combination lights for correct operation
      Result
      Result Proceed to
      Turn signal flasher relay does not turn on/off. A
      Turn signal flasher relay turns on/off. B

    B

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

    A

  7. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER ASSEMBLY - MAIN BODY ECU)


    1. Disconnect the L46 turn signal flasher assembly and L7 main body ECU (multiplex network body ECU) connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L46-8 (HAZ) - L7-3 (HAZ) Always Below 1 Ω
      L46-8 (HAZ) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  8. PERFORM ACTIVE TEST USING GTS (WIRELESS DOOR LOCK BUZZER)


    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 / 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 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

  9. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the A34 wireless door lock buzzer and 2C 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
      A34-1 (B) - 2C-23 Always Below 1 Ω
      A34-2 (E) - Body ground Always Below 1 Ω
      A34-1 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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

      A00444QE25
      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
      2C-23 - A-21 (BZR) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  11. REPLACE WIRELESS DOOR LOCK BUZZER


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


    NEXT

  12. 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)