ENTRY AND START SYSTEM(for Entry Function) Entry Exterior Alarm and Answer-back Buzzer do not Sound

DESCRIPTION

The entry and start system (for Entry Function) uses the wireless door lock buzzer to perform various vehicle exterior warnings. When the conditions of each warning are met, the certification ECU (smart key ECU assembly) sends a buzzer activation request signal to the main body ECU (multiplex network body ECU) via CAN communication and the buzzer sounds.

WIRING DIAGRAM

A001WLPE28

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

    Click here

  • When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to Precaution.

    Click here

  • After repair, confirm that no DTCs are output.

PROCEDURE


  1. SYSTEM CHECK


    1. Check the vehicle specifications.

      Result
      Result Proceed to
      w/ Wireless Door Lock Buzzer Answer-back Function A
      w/o Wireless Door Lock Buzzer Answer-back Function B

    B

    GO TO STEP 3 Click here

    A

  2. CHECK CUSTOMIZE SETTING (WIRELESS BUZZER RESP)


    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.


      Wireless Door Lock
      Tester Display Description Default Setting ECU
      Wireless Buzzer Resp Wireless buzzer response ON 0:OFF,1:ON Main body ECU (multiplex network body ECU)
      Result
      Result Proceed to
      "ON" is displayed A
      "OFF" is displayed B

    B

    PERFORM CUSTOMIZE SETTING Click here

    A

  3. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM


    1. Check that the function operates normally.

      Click here

      Result
      Result Proceed to
      Wireless door lock function operates normally A
      Wireless door lock function does not operate normally B

    B

    GO TO PROBLEM SYMPTOMS TABLE Click here

    A

  4. READ VALUE USING GTS (EACH UNLOCK DETECTION SWITCH)


    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 UNLOCK or LOCK

      UNLOCK: Front door RH unlocked

      LOCK: Front door RH locked

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

      UNLOCK: Front door LH unlocked

      LOCK: Front door LH locked

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

      ON: Rear door LH or rear door RH unlocked

      OFF: Rear door LH and rear door RH locked

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

      ON: Rear door LH or rear door RH unlocked

      OFF: Rear door LH and rear door RH locked

      		 -

      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

  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 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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

  6. CHECK WIRELESS DOOR LOCK BUZZER


    1. Disconnect the A24 wireless door lock buzzer connector.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

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

    6. Perform 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
    7. A001X8DC43
      *a

      Front view of wire harness connector

      (to Wireless Door Lock Buzzer)

      While performing the Active Test, measure the voltage between the terminals of the wireless door lock buzzer.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A24-1 (B) - A24-2 (E) Active Test Wireless Buzzer ON

      Pulse generation

      (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)
      Active Test Wireless Buzzer OFF 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) AND BODY GROUND)


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


    2. Disconnect the A24 wireless door lock buzzer connector.

    3. Reconnect the 3F instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A24-1 (B) - MB-21 (BZR) Always Below 1 Ω
      A24-2 (E) - Body ground Always Below 1 Ω
      A24-1 (B) or MB-21 (BZR) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

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

    C

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


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

    2. Disconnect the A24 wireless door lock buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A24-1 (B) - 3F-29 Always Below 1 Ω
      A24-1 (B) or 3F-29 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    B

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR