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.
Ignition Antenna Unit (IAU)
Ignition antenna unit (IAU) is installed in the instrument panel beside the steering wheel.
The Ignition antenna unit (IAU) has an internal antenna that can be activated on command from the Central electronic module (CEM). The antenna is used for checking the key identity when the remote key is inserted in the ignition. The antenna is activated by the Central electronic module (CEM) when starter button is pushed.
The remote key does not need to be inserted into the ignition if there is a keyless vehicle module (KVM) in the vehicle. The identity of the remote key is then checked via the antennas in the passenger compartment instead. These antennas are connected to the keyless vehicle module (KVM) when the starter button is pushed.
The Ignition antenna unit (IAU) is powered by the central electronic module (CEM) and grounded in the body.
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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.