Exhaust Gas RECIRCULATION (EGR): Notes
ECM controls EGR through a EGR solenoid valve. ECM controls solenoid based upon input signals received from various input components. If EGR system components test okay and system fails to function properly due to ECM control of EGR solenoid, test input signals which ECM uses to determine control of EGR system. See EGR SYSTEM INPUT SIGNALS table.
EGR SYSTEM INPUT SIGNALS
| Signal | Data |
|---|---|
| Closed Throttle Position Switch | Idle Position |
| Coolant (Engine) Temperature Sensor | Engine Temperature |
| Crankshaft Position Sensor | Engine Speed |
| Ignition Switch | Crank (START) Signal |
| Throttle Position Sensor | Idle Position |