Control Functions
The engine control module (ECM) controls the following components and functions on the basis of these input signals:
- main relay (2/32)
- fuel pump (FP), by activating the fuel pump (FP) relay (2/23)
- fuel injection, by individually activating injectors (8/6-8/10)
- ignition, by transmitting signals to the ignition discharge module (IDM) integrated with the ignition coil (4/44)
- idling speed, by operating the idle air control (IAC) valve (8/5)
- pressure in the inlet manifold during engine braking by regulating the idle air control (IAC) valve (8/5)
- engine cooling fan (FC), by activating the fan control (FC) relay (2/11)
- turbocharger (TC) boost pressure, by controlling the turbocharger (TC) control valve (8/28)
- EVAP-system canister purge (CP) valve (8/18)
- malfunction indicator lamp (MIL) (10/106) for emission-related faults
- preheating of front and rear heated oxygen sensors (HO2S) (7/15 and 7/82)
- air conditioning (A/C) compressor relay (2/22), for shutting-off compressor.
- EVAP canister shut-off valve (8/44), certain markets only.
- pulsed secondary air injection system (PAIR) pump valve (8/43)
- pulsed secondary air injection system (PAIR) pump, by activating the pulsed secondary air injection system (PAIR) pump relay (2/53).