ENTRY AND START SYSTEM(for Entry Function) Wireless Door Lock Buzzer Does not Sound

DESCRIPTION

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

WIRING DIAGRAM

A005KE4E02

CAUTION / NOTICE / HINT

Click here

Note


  • The entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.

  • After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".

  • Initialization is necessary when the main body ECU (multiplex network body ECU) is replaced* Click here.


PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (WIRELESS BUZZER)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    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
      Tester Display Test Part Control Range Diagnostic Note
      Wireless Buzzer Wireless door lock buzzer ON/OFF -
      OK
      Wireless door lock buzzer sounds.

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

  2. CHECK HARNESS AND CONNECTOR (JUNCTION BLOCK - WIRELESS BUZZER AND BODY GROUND)


    1. Disconnect the A34 wireless door lock buzzer connector.

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

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A34-1(B) - 3C-34 Always Below 1 Ω
      A34-2(E) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A34-1(B) - Body ground Always 10 kΩ or higher
      3C-34 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE WIRELESS DOOR LOCK BUZZER


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


    NEXT

  4. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (WIRELESS BUZZER)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    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
      Tester Display Test Part Control Range Diagnostic Note
      Wireless Buzzer Wireless door lock buzzer ON/OFF -
      OK
      Wireless door lock buzzer sounds.

    OK

    END (WIRELESS DOOR LOCK BUZZER WAS DEFECTIVE)

    NG

  5. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Temporarily replace the main body ECU (multiplex network body ECU) with a new or normally functioning one Click here.


    NEXT

  6. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (WIRELESS BUZZER)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    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
      Tester Display Test Part Control Range Diagnostic Note
      Wireless Buzzer Wireless door lock buzzer ON/OFF -
      OK
      Wireless buzzer turns ON/OFF.

    OK

    END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here