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 MANUALSJEEP1986CHEROKEE LAREDO, 2D UTILITY, 2.5 H, 4WD, STANDARD, AX5REPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM2.5L TBI SYSTEMCOMPONENT TESTINGMANIFOLD AIR TEMPERATURE (MAT) SENSOR
1986 Jeep Cherokee Laredo, 2D Utility, 2.5 H, 4WD, Standard, AX5
Manifold Air Temperature (Mat) Sensor
1986 Jeep Cherokee Laredo, 2D Utility, 2.5 H, 4WD, Standard, AX5SECTION Manifold Air Temperature (Mat) Sensor
- Disconnect wiring harness connector from the MAT sensor. Test resistance of the sensor with an ohmmeter. If resistance is not 185-100,700 ohms (3400 ohms at 70°F; 1600 ohms at 100°F), replace sensor. With engine warm, resistance should be less than 1000 ohms.
- Connect one ohmmeter lead to sensor connector terminal. Connect other lead, in turn, to ECU harness connector terminals 32 and 14. Repair wiring harness if resistance is greater than 1 ohm.
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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.