Electronic Ignition Timing Control System: Description

Electronic ignition timing control is used on Federal vehicles. Ignition timing is controlled by the ECC control unit, which adjusts timing to engine operating conditions. Optimum timing for all engine conditions has been programmed into the ECC control unit.

Signals used for determination of ignition timing are cylinder head temperature, engine RPM, engine load, engine crank angle, etc. Signal from the ECC control unit is sent to the power transistor of the ignition coil to control the ignition timing.