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

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DTC Code DTC Name
  Entry Exterior Alarm and Answer-back Buzzer do not Sound
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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.

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WIRING DIAGRAM

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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.

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  • 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 entry and start system (for Entry Function) Precaution.

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  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

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PROCEDURE


  1. Click here

    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.


      1. 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

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    CHECK WIRELESS DOOR LOCK CONTROL SYSTEM


    1. Check that the wireless door lock functions operate normally.

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

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    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.


      1. 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

        		 -




      1. Body Electrical > Main Body > Data List
        Tester Display
        FR Door Lock Pos
        FL Door Lock Pos





      OK
      The GTS display changes correctly in response to the lock/unlock operation.
      Result
      Proceed to
      OK
      NG

  4. Click here

    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.


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



      1. Body Electrical > Main Body > Active Test
        Tester Display
        Wireless Buzzer




      Result
      Result Proceed to
      Wireless buzzer does not sound A
      Wireless buzzer sounds B

    • AClick here
    • B

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  5. Click here

    CHECK WIRELESS DOOR LOCK BUZZER


    1. Disconnect the A14 wireless door lock buzzer connector.

    2. Perform the Active Test using the GTS and sound the wireless door lock buzzer.


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



      1. Body Electrical > Main Body > Active Test
        Tester Display
        Wireless Buzzer




    3. B006855C24
      *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
      A14-1 (B) - A14-2 (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

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    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. Reconnect the 4C instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A14-1 (B) - MB-21 (BZR) Always Below 1 Ω
      A14-2 (E) - Body ground Always Below 1 Ω
      A14-1 (B) or MB-21 (BZR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  7. Click here

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


    1. Disconnect the 4C 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
      A14-1 (B) - 4C-28 (BZR) Always Below 1 Ω
      A14-1 (B) or 4C-28 (BZR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR