WIRELESS DOOR LOCK CONTROL SYSTEM(w/ 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 wireless door lock buzzer answer-back function do 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

B0071MSE01

CAUTION / NOTICE / HINT

Note


  • The wireless door lock control system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the wireless door lock control system after confirming that the communication system is functioning properly.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • Before performing the inspection, check that DTC B1242 is not output.

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/ Door Control Battery

PROCEDURE


  1. CHECK CUSTOMIZE SETTING USING GTS (Hazard Answer Back, Wireless Buzzer Resp, Wireless Buzzer Vol)


    1. Connect the GTS to the DLC3.

    2. Turn the engine 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
      Tester Display Description Default Setting ECU
      Hazard Answer Back Function that flashes the hazard warning lights once when the doors are locked by wireless operation and twice when the doors are unlocked by wireless operation ON 0:OFF,1:ON Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Resp Function that enables/disables the wireless door lock buzzer response ON 0:OFF,1:ON Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Vol Function that adjusts the wireless door lock buzzer volume Level5 0000:Level7,0001:Level6,0010:Level5,0011:Level4,0100:Level3,0101:Level2,0110:Level1,0111:Level0 Main body ECU (Multiplex network body ECU)
      Result
      Result Proceed to
      All settings are ON and other than Level0 A
      A setting is OFF or Level0 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 electrical key transmitter sub-assembly.

      Click here

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

    B

    GO TO PROBLEM SYMPTOMS TABLE Click here

    A

  3. READ VALUE USING GTS (FR Door Lock Pos, FL Door Lock Pos, RR-Door Lock Pos SW, RL-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.


      Body Electrical > Main Body > Data List
      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 Rear door RH unlock detection switch signal OFF or ON

      OFF: Rear door RH locked

      ON: Rear door RH unlocked

      		 -
      RL-Door Lock Pos SW Rear door LH unlock detection switch signal OFF or ON

      OFF: Rear door LH locked

      ON: Rear door LH unlocked

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      FR Door Lock Pos
      FL Door Lock Pos
      RR-Door Lock Pos SW
      RL-Door Lock Pos SW
      OK
      The GTS display changes correctly in response to the lock/unlock operation.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  4. CHECK WIRELESS ANSWER-BACK OPERATION


    1. Check the wireless answer-back operation using the electrical key transmitter sub-assembly.

      Click here

      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

    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 / Data List.

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


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Wireless Buzzer Wireless door lock buzzer OFF/ON -

      Body Electrical > Main Body > Active Test
      Tester Display
      Wireless Buzzer
      Result
      Result Proceed to
      Wireless door lock buzzer does not sound A
      Wireless door lock buzzer sounds B

    B

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

    A

  6. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Disconnect the A16 wireless door lock buzzer connector.

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


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Wireless Buzzer Wireless door lock buzzer OFF/ON -

      Body Electrical > Main Body > Active Test
      Tester Display
      Wireless Buzzer
    3. B0070TAC55
      *a

      Front view of wire harness connector

      (to Wireless Door Lock Buzzer)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A16-1 (B) - A16-2 (E) Active Test Wireless Buzzer is OFF Below 1 V
      Active Test Wireless Buzzer is ON

      Pulse generation

      (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE WIRELESS DOOR LOCK BUZZER Click here

    NG

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


    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Click here

    2. Reconnect the instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A16-1 (B) - MB-21 (BZR) Always Below 1 Ω
      A16-2 (E) - Body ground Always Below 1 Ω
      A16-1 (B) or MB-21 (BZR) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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


    1. Disconnect the 3C instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A16-1 (B) - 3C-29 Always Below 1 Ω
      A16-1 (B) or 3C-29 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HAZARD WARNING LIGHTS OPERATION


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

      OK
      Hazard warning lights blink.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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