Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSEAGLE1995SUMMIT WAGON AWD L4-1795CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONFUNCTIONAL OPERATION
1995 Eagle Summit Wagon AWD L4-1795cc 1.8L SOHC
Functional Operation
1995 Eagle Summit Wagon AWD L4-1795cc 1.8L SOHCSECTION Functional Operation
When the main sensor functions are detected by the on-board diagnostics, the vehicle is controlled by means of the following defaults.
VOLUME AIR FLOW SENSOR
- Uses the Throttle Position Sensor (TPS) signal and engine speed signal (crankshaft position sensor signal) to read the injector basic drive time and basic ignition timing from the preset map.
- Fixes the Idle Air Control (IAC) motor in the appointed position so the idle air control is not performed.
INTAKE AIR TEMPERATURE SENSOR
- Controls as if the intake air temperature is 25°C (77°F).
THROTTLE POSITION SENSOR (TPS)
- No increase in fuel injection amount during acceleration due to the unreliable throttle position signal.
ENGINE COOLANT TEMPERATURE SENSOR
- Controls as if the coolant temperature is 80°C (176°F).
CAMSHAFT POSITION SENSOR
- Injects fuel into the cylinders in the order 1-3-4-2 with regular timing. (After the ignition switch is turned to ON, the No. 1 cylinder top dead center position is not detected at all.)
BAROMETRIC PRESSURE SENSOR
- Controls as if the barometric pressure is 101 kPa (170 mm Hg, 30 in. Hg) (sea level).
IAC VALVE POSITION SENSOR
- Idle air control is not performed.
HEATED OXYGEN SENSOR (FRONT)
- Air/Fuel ratio closed loop control is not performed.
HEATED OXYGEN SENSOR (REAR)
- Performs the closed loop control of the air/fuel ratio by using only the signal of the heated oxygen sensor (front) installed on the front side of the catalytic converter.
MISFIRE DETECTION
- The Engine Control Module (ECM) stops supplying fuel to the cylinder with the highest misfiring rate if a misfiring that could damage the catalytic converter is detected.
VOLUME AIR FLOW SENSOR
- Uses the Throttle Position Sensor (TPS) signal and engine speed signal (crankshaft position sensor signal) to read the injector basic drive time and basic ignition timing from the preset map.
- Fixes the Idle Air Control (IAC) motor in the appointed position so the idle air control is not performed.
INTAKE AIR TEMPERATURE SENSOR
- Controls as if the intake air temperature is 25°C (77°F).
THROTTLE POSITION SENSOR (TPS)
- No increase in fuel injection amount during acceleration due to the unreliable throttle position signal.
ENGINE COOLANT TEMPERATURE SENSOR
- Controls as if the coolant temperature is 80°C (176°F).
CAMSHAFT POSITION SENSOR
- Injects fuel into the cylinders in the order 1-3-4-2 with regular timing. (After the ignition switch is turned to ON, the No. 1 cylinder top dead center position is not detected at all.)
BAROMETRIC PRESSURE SENSOR
- Controls as if the barometric pressure is 101 kPa (170 mm Hg, 30 in. Hg) (sea level).
IAC VALVE POSITION SENSOR
- Idle air control is not performed.
HEATED OXYGEN SENSOR (FRONT)
- Air/Fuel ratio closed loop control is not performed.
HEATED OXYGEN SENSOR (REAR)
- Performs the closed loop control of the air/fuel ratio by using only the signal of the heated oxygen sensor (front) installed on the front side of the catalytic converter.
MISFIRE DETECTION
- The Engine Control Module (ECM) stops supplying fuel to the cylinder with the highest misfiring rate if a misfiring that could damage the catalytic converter is detected.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.