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.
Vehicle Immobilizer Module
The Vehicle Immobilizer Module (VIM) sends a fuel continue message to the PCM/VCM if the vehicle is started after using either a valid key fob UNLOCK command or the override procedure. See Figure. The VIM works on a rolling code system and can accept up to 50,000 different codes from the key fob. The VIM also controls the remote keyless entry feature, and the illuminated entry feature, which controls the courtesy and dome lights.
The VIM controls the operation of the SECURITY indicator lamp by providing ground at terminal M. Lamp control is based upon inputs from the following components:
- The VCM (Class 2 Data, terminal C and terminal D)
- The ignition switch (Ignition 1, terminal J, CKT 39)
- The brake pedal (Stop Lamps, terminal L)
- The SECURITY indicator (SECURITY Indicator Control, terminal M)
- The signals received from the transmitter in the key fob
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.