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.
Immobilizer Unit & Powertrain Control Module
2003 Hyundai XG350 BaseSECTION Immobilizer Unit & Powertrain Control Module
WARNING: This page does not describe the selected car, but rather 164 other vehicles, including the 2002 Volvo V70, 2002 Volvo V40, 2002 Volvo S80, 2002 Volvo S60, and 2002 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Keys may be new or valid. If errors occur during reprogramming in steps 1 or 2, start over from step 1. If errors occur during step 3, go to REPROGRAM ERROR RECOVERY .
- Cut new transponder equipped key(s), if necessary. After replacing immobilizer unit and PCM. Using first key, turn ignition switch to ON position. SECURITY light should illuminate and then go out. Turn first key to LOCK position and remove key. SECURITY light should flash repeatedly in single pulses.
- Using second key, turn ignition switch to ON position. SECURITY light should illuminate and then go out. Turn second key to LOCK position and remove key. SECURITY light should flash in double pulses repeatedly.
- Using third key, turn ignition switch to ON position. SECURITY light should illuminate and then go out. Turn third key to LOCK position and remove key. SECURITY light should flash repeatedly in triple pulses.
- Repeat step 3 with each new key, up to 8 keys total. Waiting 30 seconds will cause program to quit automatically. After reprogramming is complete, clear DTCs with NGS tester.
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.