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Fuel Control: Notes

ECU 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 ECU.

FUEL CONTROL SYSTEM INPUT SIGNALS

Application Model Usage
A/C Clutch Signal G20 & (1) Q45
Airflow Meter G20, M30 & Q45
Battery Voltage G20, M30 & Q45
Crank Angle Sensor G20, M30 & Q45
Engine (Coolant) Temperature G20 M30 & Q45
Exhaust Gas Temperature Sensor (2) G20, M30 & Q45
Fuel Temperature Sensor M30 & Q45
Ignition (START) Switch G20 M30 & Q45
Neutral Switch (3) G20
Oxygen Sensor G20, M30 & (4) Q45
Park/Neutral (Inhibitor) Switch G20, (5) M30 & (6) Q45
Power Steering Pressure Switch G20 & Q45
Secondary Throttle Sensor (7) Q45
Sub-Crank Angle Sensor Q45
Throttle Position Sensor G20, M30 & Q45
Throttle (Idle) Switch M30 & Q45
Vehicle Speed Sensor G20, M30 & Q45
(1) Signal received from automatic A/C amplifier.
(2) California models only.
(3) M/T models only.
(4) 2 used.
(5) Signal received from transmission control unit.
(6) Signal received from P/N relay.
(7) Traction control system equipped models.