WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Entry and Start System) Wireless Door Lock Buzzer Does not Sound

DESCRIPTION

The wireless door lock control system uses the wireless door lock buzzer to perform various vehicle exterior warnings. When the conditions for each warning are met, the certification ECU sends a buzzer signal to the main body ECU via CAN communication, the main body ECU sends the signal to the wireless door lock buzzer, and the wireless door lock buzzer sounds.

Note


  • Before performing the inspection, check that there are no problems related to the CAN communication system.

  • Check that DTC B1242 is not output.

  • When troubleshooting a function, first make sure that the door ajar warning function is set to the default setting.

WIRING DIAGRAM

A01IRT5E02

INSPECTION PROCEDURE

PROCEDURE


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


    1. Check that the wireless door lock buzzer sounds when operating it with the Active Test Click here.

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

    NG

    CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU AND BODY GROUND) Click here

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

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


    1. A01IRMPE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU [Instrument Panel Junction Block])
      *2

      Front view of wire harness connector

      (to Wireless Door Lock Buzzer)

      Disconnect the H81 ECU connector.

    2. Disconnect the A45 buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A45-1 (B) - H81-2 (BZR) Always Below 1 Ω
      A45-2 (E) - Body ground
      A45-1 (B) - 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. CHECK WIRELESS DOOR LOCK BUZZER (OPERATION)


    1. Check that the wireless door lock buzzer sounds by operating the door ajar warning function Click here.

      OK
      Wireless door lock buzzer sounds.

    NG

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    OK

    END (WIRELESS DOOR LOCK BUZZER IS DEFECTIVE)