Focus L4-2.0L DOHC VIN 5 (2003)
General Module: Description and Operation
Principles of Operation (How Does It Work?)
The GEM constantly monitors its subsystems for concerns. If a concern is found in one of the subsystems, the GEM will record the concern in the form
of a diagnostic trouble code (DTC). The ignition switch position is very important to the GEM function. Often times, erratic or unexpected GEM
function can be traced to concerns with ignition switch inputs.
