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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEM - SECURITY AND LOCKSKEYLESS ENTRY SYSTEMINSPECTIONCHECK KEYLESS BUZZER
2016 Subaru Legacy 2.5i

Check Keyless Buzzer

2016 Subaru Legacy 2.5iSECTION Check Keyless Buzzer
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK BODY INTEGRATED UNIT SETTING. 
Display the data of «Answer-back buzzer setup» using Subaru Select Monitor.
NOTE: For detailed operation procedures, refer to "Application help".
 Is the setting ON? Go to step 2  . Turn the setting to ON.
2 CHECK BODY INTEGRATED UNIT SETTING. 
Display the data of «Keyless Buzzer Volume» using Subaru Select Monitor.
Turn the setting to "7".		 Does the keyless buzzer sound? Set to the volume that the customer requested. Go to step 3  .
3 CHECK BODY INTEGRATED UNIT. 
Select and perform the «Keyless Buzzer Output » using Subaru Select Monitor.		 Does the keyless buzzer sound? Check the keyless control module. Go to step 4  .
4 CHECK KEYLESS BUZZER CIRCUIT. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors of the body integrated unit and keyless buzzer.
  3. Check the harness between body integrated unit and keyless buzzer.

    Connector & terminal 

    (B281) No. 10 - (B490) No. 1: 

 Is harness normal? Go to step 5  . Repair or replace the harness.
5 CHECK HARNESS. 
Measure the resistance between keyless buzzer connector and chassis ground.
Connector & terminal 
(B490) No. 1 - Chassis ground: 		 Is the resistance value 10 kΩ or more? Go to step 6  . Repair or replace the short circuit of the harness.
6 CHECK KEYLESS BUZZER CIRCUIT. 
Measure the resistance between the keyless buzzer connector and chassis ground.
Connector & terminal 
(B490) No. 2 - Chassis ground: 		 Is the resistance less than 10 Ω? Go to step 7  . Repair or replace the harness.
7 CHECK BODY INTEGRATED UNIT. 
  1. Connect the connector of body integrated unit.
  2. Select and perform the «Keyless Buzzer Output» using Subaru Select Monitor.
  3. Measure the voltage between body integrated unit connector and chassis ground using an oscilloscope.

    Connector & terminal 

    (B281) No. 10 (+) - Chassis ground (-): 

 Is the frequency 2 kHz or the voltage 9 V or more? Replace the keyless buzzer. Replace the body integrated unit. < Ref. to BODY INTEGRATED UNIT . >
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.