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Fuel Control: Notes
ECM controls fuel system based upon sensor input signals. See FUEL CONTROL SYSTEM INPUT SIGNALS table. If feedback system does not function properly, check input signals before replacing ECM.
FUEL CONTROL SYSTEM INPUT SIGNALS
| Application |
Model Usage |
| A/C Clutch Signal |
G20 &
Q45 |
| Mass Airflow Sensor |
G20, J30 & Q45 |
| Battery Voltage |
G20, J30 & Q45 |
| Crankshaft Position Sensor |
G20, J30 & Q45 |
| Engine (Coolant) Temperature |
G20, J30 & Q45 |
| EGR Temperature Sensor |
G20, J30 & Q45 |
| Fuel Temperature Sensor |
J30 |
| Ignition (START) Signal |
G20, J30 & Q45 |
| Neutral Switch |
G20 |
| Heated Oxygen Sensor |
G20,
J30 &
Q45 |
| Park/Neutral (Inhibitor) Switch |
G20,
J30 &
Q45 |
| Power Steering Pressure Switch |
G20, J30 & Q45 |
| Secondary Throttle Sensor |
Q45 |
| Sub-Crankshaft Position Sensor |
Q45 |
| Throttle Position Sensor |
G20, J30 & Q45 |
| Closed Throttle Position Switch |
J30 & Q45 |
| Vehicle Speed Sensor |
G20, J30 &
Q45 |