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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (For Entry) - Symptom Tests (2 Of 2) >> SMART KEY SYSTEM (for Entry Function) >> Entry Exterior Alarm and Answer-back Buzzer do not Sound [11/2023 - ] >> Procedure

Entry Exterior Alarm and Answer-back Buzzer do not Sound [11/2023 - ]: Procedure

  1. CHECK CUSTOMIZE SETTING (WIRELESS BUZZER RESPONSE FUNCTION) 
    1. Read the customize setting according to the display on the GTS.

      Wireless Door Lock 

      Tester Display Description Default Setting ECU
      Wireless Buzzer Response Function Wireless buzzer response Enable $00:Disable, $01:Enable Main body ECU (multiplex network body ECU)

      Result

      Result Proceed to
      "Enable" is displayed A
      "Disable" is displayed B

    Result: 

    PERFORM CUSTOMIZE SETTING. Refer to  CUSTOMIZE PARAMETERS [11/2023 - ] 

    Result: 

    See step  2

  2. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM 
    1. Check that the function operates normally.

      Refer to OPERATION CHECK [11/2023 - ]

      Result

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

    Result: 

    GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2023 - ] 

    Result: 

    See step  3

  3. READ VALUE USING GTS (EACH UNLOCK DETECTION SWITCH) 
    1. 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 Position Switch Status Front door RH unlock detection switch signal Unlock or Lock Unlock: Front door RH unlocked
      Lock: Front door RH locked
      -
      FL Door Lock Position Switch Status Front door LH unlock detection switch signal Unlock or Lock Unlock: Front door LH unlocked
      Lock: Front door LH locked
      -
      RR Door Lock Position Switch Status Rear door RH unlock detection switch signal Unlock or Lock Unlock: Rear door RH locked
      Lock: Rear door RH unlocked
      -
      RL Door Lock Position Switch Status Rear door LH unlock detection switch signal Unlock or Lock Unlock: Rear door LH locked
      Lock: Rear door LH unlocked
      -

      Body Electrical > Main Body > Data List 

      Tester Display
      FR Door Lock Position Switch Status
      FL Door Lock Position Switch Status
      RR Door Lock Position Switch Status
      RL Door Lock Position Switch Status

      OK

      The GTS display changes correctly in response to the lock/unlock operation.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit). Refer to  Door Unlock Detection Switch Circuit [11/2023 - ] 

    Result: 

    OK 

    See step  4

  4. PERFORM ACTIVE TEST USING GTS (WIRELESS BUZZER) 
    1. 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 buzzer OFF/ON -

      Body Electrical > Main Body > Active Test 

      Tester Display
      Wireless Buzzer

      Result

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

    Result: 

    GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (NO ANSWER-BACK). Refer to  No Answer-Back [11/2023 - ] 

    Result: 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [11/2023 - ]