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 (network gateway ECU) via CAN communication, the main body ECU (network gateway ECU) sends the signal to the wireless door lock buzzer, and the wireless door lock buzzer sounds.

WIRING DIAGRAM

A004KKNE02
*a Wireless Door Lock Buzzer
*b Main Body ECU (Network Gateway ECU)
*c Certification ECU (Smart Key ECU Assembly)
*d CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

  • The entry and start system (for Entry Function) uses a 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.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.

PROCEDURE


  1. 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. According to the display on the GTS, perform the Active Test.

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

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - WIRELESS DOOR LOCK BUZZER AND BODY GROUND)


    1. Disconnect the A63 wireless door lock buzzer connector.

    2. Disconnect the A73 main body ECU (network gateway ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A63-1 (+) - A73-1 (BZR) Always Below 1 Ω
      A63-2 (-) - Body ground Always Below 1 Ω
      A63-1 (+) - 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 GTS


    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. According to the display on the GTS, perform the Active Test.

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

    OK

    END (WIRELESS DOOR LOCK BUZZER WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here