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 MANUALSJEEP1999CHEROKEE 2WD L4-2.5L VIN PREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSBATTERY TEMPERATURE SENSORTESTING AND INSPECTIONTESTING
1999 Jeep Cherokee 2WD L4-2.5L VIN P
Testing
1999 Jeep Cherokee 2WD L4-2.5L VIN PSECTION Testing
To perform a complete test of this sensor and its circuitry, refer to the appropriate Powertrain Diagnostic Procedures. To test the sensor only, refer to the following:
1. The sensor is located under the battery and is attached to the battery tray. A two-wire pigtail harness is attached directly to the sensor. The opposite end of this harness connects the sensor to the engine wiring harness.
2. Disconnect the two-wire pigtail harness from the engine harness.
3. Attach ohmmeter leads to the wire terminals of the pigtail harness.
4. At room temperature of 25° C (75-80° F), an ohmmeter reading of 9,000 (9K) to 11,000 (11 K) ohms should be observed.
5. If reading is above or below the specification, replace the sensor.
6. Refer to the Replacement for procedures.
Battery Temperature Sensor:
1. The sensor is located under the battery and is attached to the battery tray. A two-wire pigtail harness is attached directly to the sensor. The opposite end of this harness connects the sensor to the engine wiring harness.
2. Disconnect the two-wire pigtail harness from the engine harness.
3. Attach ohmmeter leads to the wire terminals of the pigtail harness.
4. At room temperature of 25° C (75-80° F), an ohmmeter reading of 9,000 (9K) to 11,000 (11 K) ohms should be observed.
5. If reading is above or below the specification, replace the sensor.
6. Refer to the Replacement for procedures.
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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.