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 MANUALSJEEP2002LIBERTY LIMITED EDITION 2WD V6-3.7L VIN KREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGREFRIGERANT PRESSURE SENSOR / SWITCHHIGH PRESSURE SENSOR / SWITCHTESTING AND INSPECTION
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN K
High Pressure Sensor / Switch: Testing and Inspection
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN KSECTION Testing and Inspection
Before performing diagnosis of the A/C high pressure switch, verify that the refrigerant system has the correct refrigerant charge.
For circuit descriptions and diagrams.
1. Disconnect and isolate the battery negative cable.
2. Unplug the A/C high pressure switch wire harness connector from the switch on the refrigerant system fitting.
3. On the four terminal A/C high pressure switch, check for continuity between terminals C and D. On the two terminal A/C high pressure switch, check for continuity between both terminals of the switch. There should be continuity. If OK, test and repair the A/C switch sense circuit as required. If not OK, replace the faulty switch.
For circuit descriptions and diagrams.
1. Disconnect and isolate the battery negative cable.
2. Unplug the A/C high pressure switch wire harness connector from the switch on the refrigerant system fitting.
3. On the four terminal A/C high pressure switch, check for continuity between terminals C and D. On the two terminal A/C high pressure switch, check for continuity between both terminals of the switch. There should be continuity. If OK, test and repair the A/C switch sense circuit as required. If not OK, replace the faulty switch.
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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.