Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSSECURITY AND LOCKS - KEYLESS ACCESS (W/PUSH BUTTON START) (DIAGNOSTICS)DIAGNOSTICS WITH PHENOMENONINSPECTIONKEYLESS ACCESS LOCK/UNLOCK CANNOT BE PERFORMED FROM ANY OF THE DOORS
2016 Subaru Legacy 2.5i
Keyless Access Lock/Unlock Cannot Be Performed From Any Of The Doors
2016 Subaru Legacy 2.5iSECTION Keyless Access Lock/Unlock Cannot Be Performed From Any Of The Doors
CAUTION:
- Check that there are no other registered access keys inside the passenger room.
- Check that the access key is not too close to the vehicle.
- Inspect LAN system according to the basic diagnostic procedure, and make sure that there is no fault.
- Check that the keyless access function is not stopped.
- When the access key or keyless access control module is replaced, registration of the immobilizer is required. For the relevant procedures, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
DIAGNOSTICS PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK OPERATION OF KEYLESS DOOR LOCK. Using the keyless function of the access key, check the operation of the door lock. |
Does it lock/unlock normally? | Check the exterior antenna, touch sensor, lock/unlock button. | Go to step 2 . |
| 2 CHECK ACCESS KEY. Check for whether lock and unlock is possible with the registered access key. |
Is there any access key which can lock/unlock when the touch sensor is operated? | Check the access key that does not operate. Go to step 3 . | Go to step 4 . |
| 3 CHECK ACCESS KEY. Measure the battery voltage of the access key that does not operate. |
Is the voltage 2.5 - 3.2 V? | Replace the access key. | Replace the battery. |
| 4 CHECK DOOR LOCK. Operate the driver's center door lock switch. |
Does the door lock operate? | Go to step 5 . | Check the door lock control system. < Ref. to INSPECTION , Door Lock Control System. > |
5 CHECK HARNESS.
|
Is the voltage 10 V or more? | Go to step 6 . | Check the keyless access control module power supply circuit. |
| 6 CHECK HARNESS. Using a tester, measure the resistance between the keyless access control module connector and chassis ground. Connector & terminal (i241) No. 21 - Chassis ground: (i75) No. 1 - Chassis ground: |
Is the resistance less than 10 Ω? | Replace the keyless access control module. < Ref. to REMOVAL , Keyless Access control module. > | Repair or replace the open circuit of harness. |
RENDER: 1.0x
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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.