Patriot 4WD L4-2.4L (2009)
Engine Control Module: Description and Operation
Powertrain Control Module - Operation
5 Volt Supplies
OPERATION
The PCM supplies two regulated 5 volts supplies - a 5V primary and a 5V secondary (auxiliary) to the following sensors:
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Camshaft Position Sensor (5V secondary)
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Crankshaft Position Sensor (5V primary)
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EGR Position feedback sensor (5V secondary) (if equipped)
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Engine coolant temperature sensor (connected to 5V internal via a pull-up resistor)
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Inlet Air Temperature Sensor (connected to 5V internal via a pullup resistor)
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Knock sensor (connected to 5V internal via a pullup resistor)
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Manifold absolute pressure sensor (5V secondary)
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Oil Pressure Switch (connected to 5V internal via pullup resistor)
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Pedal Value Sensor #1 (5V Primary)
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Pedal Value Sensor #2 (5V Secondary)
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SRV Position Feedback Sensor (5V Secondary)
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Throttle Position Sensors (5V Primary)
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Variable Line Pressure Sensor (5V Secondary)
PCM
POWERTRAIN CONTROL MODULE
The PCM receives input signals from various switches and sensors that are referred to as PCM Inputs. Based on these inputs, the PCM adjusts various
engine and vehicle operations through devices that are referred to as PCM Outputs.
NOTE: PCM Inputs:
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Air Conditioning Controls
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Battery Voltage
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Brake Switch
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Camshaft Position Sensor
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Clutch Upstop Switch
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Clutch Interlock
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Crankshaft Position Sensor
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Engine Coolant Temperature Sensor
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Fuel Level Sensor (Bus message)
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Ignition Switch
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Intake Air Temperature Sensor
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Knock Sensor
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Evaporative System Integrity Monitor