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 MANUALSJEEP2009COMPASS 4WD L4-2.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONPOWERTRAIN CONTROL MODULE - OPERATION5 VOLT SUPPLIES
2009 Jeep Compass 4WD L4-2.0L
5 Volt Supplies
2009 Jeep Compass 4WD L4-2.0LSECTION 5 Volt Supplies
OPERATION
The PCM supplies two regulated 5 volts supplies - a 5V primary and a 5V secondary (auxiliary) to the following sensors:
- Camshaft Position Sensor (5V secondary)
- Crankshaft Position Sensor (5V primary)
- EGR Position feedback sensor (5V secondary) (if equipped)
- Engine coolant temperature sensor (connected to 5V internal via a pull-up resistor)
- Inlet Air Temperature Sensor (connected to 5V internal via a pullup resistor)
- Knock sensor (connected to 5V internal via a pullup resistor)
- Manifold absolute pressure sensor (5V secondary)
- Oil Pressure Switch (connected to 5V internal via pullup resistor)
- Pedal Value Sensor #1 (5V Primary)
- Pedal Value Sensor #2 (5V Secondary)
- SRV Position Feedback Sensor (5V Secondary)
- Throttle Position Sensors (5V Primary)
- Variable Line Pressure Sensor (5V Secondary)
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.