Galant L4-1997cc 2.0L SOHC 16 Valve (1993)
Engine Control Module: Component Tests and General Diagnostics
Operation
While the ignition switch is ON, battery power supply is supplied to the engine control module, injectors, volume air flow sensor, etc.
When the ignition switch is switched ON, current flows from the ignition switch, via the MFI relay coil to ground.
As a result, the MFI relay switch is switched ON, and power is supplied, by way of the MFI relay switch, from the battery to the engine control
module.
Inspection