System Inputs: Overview

System Inputs

the ECM optimizes engine performance by interpreting signals from numerous vehicle sensors and other inputs.

Some of these signals are produced by the actions of the driver, some are supplied by sensors located on and around the engine and some are supplied by other vehicle systems. the inputs are as follows:

- Ignition switch
- Accelerator pedal position sensor (APP)
- Throttle position feedback
- Crankshaft Position (CKP) sensor
- Cruise control signal (from steering wheel switch pack)
- Brake light switch
- Camshaft Position (CMP) sensors
- Engine Coolant Temperature (ECT) sensor
- Knock sensors
- Air Mass/Intake Air Temperature (MAF/IAT) sensor
- Heated Oxygen Sensors (HO2S)
- Immobilization signal (from EWS 3)
- Fuel level signal (via CAN)
- Vehicle speed signal (from ABS ECU)
- Radiator outlet temperature
- Internal ambient barometric pressure sensor (altitude sensor)
- Electronic Automatic Transmission (EAT) information.