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.
Description and Operation: Description: Antennas
- Emitting LF Antennas:
Inductive antennas in and at the vehicle are used to transform the current, driven by the SMK ECU antenna driver, into a 134.2 kHz magnetic field, which is the carrier for the SMART KEY challenge.
Three antennas cover the vehicle's exterior: two antennas in the Door Handles (DS and PS) cover the area around the doors; one antenna in the rear bumper covers the area around the trunk.
Up to two antennas cover the vehicle's interior and the trunk interior: one in the passenger compartment and one in the trunk.
- Bidirectional Immobilizer Antenna (for Limp Home):
The Immobilizer Backup Antenna is used for sending and receiving data: it emits a magnetic field (134.2 kHz challenge) and receives changes in the field strength (response of Transponder).
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.
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