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 MANUALSJEEP1991CHEROKEE 2WD L4-150 2.5L VIN P MFIREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCRANKSHAFT POSITION SENSORTESTING AND INSPECTION
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFI
Crankshaft Position Sensor: Testing and Inspection
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFISECTION Testing and Inspection
Crankshaft Position (CKP) Sensor 2.5L:
Disconnect the engine speed sensor electrical connector from the wiring harness. Check the resistance of the sensor by placing an ohmmeter across terminals A and B (marked on sensor connector). With the engine at normal operating temperature, the ohmmeter should read 200 ± 75 ohms. Replace sensor if ohmmeter readings are not within specifications.
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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.