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.
Diagnosis Procedure
- CHECK "WELCOME LIGHT OP SET" SETTING IN "WORK SUPPORT"
- Select "INTELLIGENT KEY" of "BCM" using CONSULT.
- Select "WELCOME LIGHT OP SET" in "WORK SUPPORT" mode.
- Check "WELCOME LIGHT OP SET" setting in "WORK SUPPORT".
Refer to CONSULT Function (BCM - INTELLIGENT KEY) .
Is the inspection result normal?
YES
GO TO 2.
NO
Set "On" and "WELCOME LIGHT SELECT" in "WORK SUPPORT".
- CHECK "WELCOME LIGHT SELECT" SETTING IN "WORK SUPPORT"
- Select "INTELLIGENT KEY" of "BCM" using CONSULT.
- Select "WELCOME LIGHT SELECT" in "WORK SUPPORT" mode.
- Check "WELCOME LIGHT SELECT" setting in "WORK SUPPORT".
Refer to CONSULT Function (BCM - INTELLIGENT KEY) .
Is the inspection result normal?
YES
GO TO 3.
NO
Set "WELCOME LIGHT SELECT" setting in "WORK SUPPORT".
- CHECK INSIDE KEY ANTENNA
Check inside key antenna.
- Instrument center: Refer to DTC Logic .
- Console: Refer to DTC Logic .
- Trunk room: Refer to DTC Logic .
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace the malfunctioning parts.
- CHECK OUTSIDE KEY ANTENNA
Check outside key antenna.
- Driver side: Refer to DTC Logic .
- Passenger side: Refer to DTC Logic .
- Rear bumper: Refer to DTC Logic .
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace the malfunctioning parts.
- CHECK REMOTE KEYLESS ENTRY FUNCTION
Check remote keyless entry function
Does door lock/unlock with Intelligent Key button?
YES
GO TO 6.
NO
Refer to Diagnosis Procedure .
- CHECK INTERIOR ROOM LAMP CONTROL SYSTEM
Check interior room lamp control system. Refer to System Description .
Does the room lamp and puddle lamp turn ON?
YES
GO TO 7.
NO
Refer to Symptom Table .
- REPLACE BCM
- Replace BCM. Refer to Removal and Installation .
- Confirm the operation after replacement.
Is the result normal?
YES
INSPECTION END
NO
Check intermittent incident. Refer to Intermittent Incident .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.