Inertia switch is only relevant when you have a collision and the engien does not start. Fuel pump may not run and coils no spark. If not, same thing could also happen if the immobilizer is not disabled or the key FOB gets damaged. The ignition key has an RFID chip in it and if you drop your key or remove this chip, the car will not recognize the key and wont start. You need to use your spare key from then on.
Posted on Jun 12, 2014
Inertia switch is only relevant when you have a collision and the engien does not start. Fuel pump may not run and coils no spark. If not, same thing could also happen if the immobilizer is not disabled or the key FOB gets damaged. The ignition key has an RFID chip in it and if you drop your key or remove this chip, the car will not recognize the key and wont start. You need to use your spare key from then on.
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Nov 14, 2017 | Ford Cars & Trucks
Sep 25, 2014 | 1998 Ford F150 Regular Cab
Apr 04, 2014 | 2001 Oldsmobile Silhouette
1 Inertia switch activated
2 Throttle Limp Home mode
3 Engine starts and stumbles
4 Engine fail to start
5 Engine stall
If none of the five conditions occur, check: Inertia switch to ECM circuit:
short circuit to B+ voltage Inertia switch failure
You can check the Inertia switch status on the Instrument cluster Diagnosis, see http://www.bluejag.co.uk
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