How to Reset an Anti-Theft System for a Mercury Mountaineer
Should the passive anti-theft system be engaged on your Mercury Mountaineer, you will need to reset it before the vehicle can be operated again. Luckily, this is something which you can do yourself and you will not need to have your car taken to a mechanic or the dealership.
What You'll Need
- Mercury Mountaineer key
- Battery terminal wrench
- Unlock the door to the vehicle.
- Insert the key into the ignition and start the vehicle. This should reset the passive anti-theft system of the vehicle and allow you to operate the vehicle as normally. If the system doesn’t reset proceed to step 3.
- Verify that key you have in possession is the correct key
- Wait 15 minutes and retry step 2. If the vehicle fails to reset proceed to the next step.
- Raise the hood of the Mountaineer and prop it open.
- Use a battery terminal wrench to remove the negative cable from the battery terminal.
- Wait another 15 minutes and reconnect the cable.
- Attempt step 2 once again.If the anti-theft system doesn’t reset the vehicle must be taken to a certified technician for troubleshooting and repairs.
Additional Information
- Occasionally the programmed key for the passive anti-theft system will become un-programmed and need to be reprogrammed by the dealership or by the manufacturer.
- If the anti-theft system is in active mode, a small flashing red light on the dash will begin blinking rapidly at twice the speed that it blinks when in passive mode.