Join Date: Feb 2001
Location: Bibra Lake Western Australia
Re: Rear Suspension Down Air Ride Diagnosis
Old Australian Fords (Fairmonts, Fairlanes and LTDs) also had a self diagnosis feature thus: with the ignition or engine on flick the interior light switch on and off three times quickly or flick the driver's interior light door switch 3 times in 1 second and it will go through a process where it raises, lowers then raises to normal ride height and flashes the self levelling suspension light a number of times to indicate the fault code.
0 Flashes: warning lamp failure (bulb, wiring etc) or diff module height sensor power supply failure.
1 Flash: compressor failed. Car stock in low position due to mechanical fault or obstruction, car overloaded (so compressor has insufficient power to raise), diff sensor link missing, broken or disconnected, air leak in lines or shockies, failed height sensor ground, failed height sensor power supply, failed compressor relay.
2 Flashes: Compressor exhaust valve failure, height sensor thinks vehicle is raised and will not lower (mechanical failure of obstruction) compressor exhaust valve circuit, failed diff module.
3 Flashes: Height sensor module failure.
4 Flashes: System tests OK.
Lamp always on (no flashes): failed control unit.
Do the US Fords have the same self diagnosis feature?