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 does not operate. In such cases, the main body ECU (driver side junction block assembly) hazard warning light signal outputs may be malfunctioning.

WIRING DIAGRAM

A01EKWQE02

INSPECTION PROCEDURE

Note

Troubleshooting should be started after confirming that the customize status of the answer-back function has been switched on.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    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 (Main Body ECU (Driver Side Junction Block Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D-Door Lock Pos SW Driver door lock position switch signal/LOCK or UNLOCK

      ON: Driver side door is unlocked

      OFF: Driver side door is locked

      		 -
      P-Door Lock Pos SW Front passenger side door lock position switch signal/ON or OFF

      ON: Front passenger side door is unlocked

      OFF: Front passenger side door is locked

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

      ON: Rear right side door unlocked

      OFF: Rear right side door locked

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

      ON: Rear left side door unlocked

      OFF: Rear left side door locked

      		 -
      OK
      On the GTS screen, the display changes between ON and OFF as shown in the chart above.
      Result
      Result Proceed to
      OK A
      NG (for Driver Side) B
      NG (for Front Passenger Side) C
      NG (for Rear LH Side) D
      NG (for Rear RH Side) 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

  2. CHECK WIRELESS DOOR LOCK CONTROL FUNCTION


    1. Check the wireless door lock control functions by operating the transmitter switch.

      Result
      Result Proceed to
      Wireless door lock functions are normal but hazard warning light answer-back does not occur. A
      Doors cannot be locked or unlocked with transmitter. B

    B

    GO TO PROBLEM SYMPTOMS TABLE Click here

    A

  3. CHECK HAZARD WARNING LIGHT


    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

  4. PERFORM ACTIVE TEST USING GTS (TURN SIGNAL FLASHER)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Body Electrical / Main Body / Active Test.

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

      Main Body (Main Body ECU (Driver Side Junction Block Assembly))
      Tester Display Test Part Control Range Diagnostic Note
      Hazard Turns the turn signal flasher relay ON/OFF Observe headlight and rear combination light for correct operation
      OK
      Hazard warning lights turn on/off.

    NG

    CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER ASSEMBLY - MAIN BODY ECU) Click here

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here

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


    1. A01EMG4E05
      Text in Illustration
      *1

      Front view of wire harness connected

      (to Turn Signal Flasher)
      *2

      Front view of wire harness connected

      (to Main Body ECU (Driver Side Junction Block Assembly))

      Disconnect the D34 turn signal flasher assembly connector.

    2. Disconnect the D48 main body ECU (driver side junction block assembly) connector.

    3. Measure the resistance according to the values in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D34-8 (HAZ) - D48-4 (HAZ) Always Below 1 Ω
      D34-8 (HAZ) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here