Control System: General

The ECM receives signals from various sensors, switches, and other control modules. Using these signals, it determines the engine operating conditions and if necessary, emits signals to one or more systems to control them for optimum operation.

Major control items of the ECM are as follow:

• Fuel injection control
• Ignition control
• Idle air control
• Fuel pump control
• Canister purge control  1
• Radiator fan control  2
• On-board diagnosis function

1. Canister purge control is described under Evaporative Emission Control System. < *Refer to PURGE CONTROL SOLENOID VALVE . >
2. Radiator fan control is described under CO(H4SO) section. < *Refer to RADIATOR MAIN FAN SYSTEM . >