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 BASE, 2D UTILITY, 2.8 W, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM2.5L TBI SYSTEMCOMPONENT TESTINGMANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
1986 Jeep Cherokee Base, 2D Utility, 2.8 W, RWD, Automatic
Manifold Absolute Pressure (Map) Sensor
1986 Jeep Cherokee Base, 2D Utility, 2.8 W, RWD, AutomaticSECTION Manifold Absolute Pressure (Map) Sensor
- Inspect MAP sensor vacuum hose connections at sensor and throttle body. Repair as required. Test MAP sensor output voltage at MAP sensor connector pin B (as marked on sensor body) with the ignition switch "ON" and engine off. See Fig 1
. Output voltage should be 4.0-5.0 volts.NOTE: Voltage should drop 0.5-1.5 volts with hot engine, at idle.
RENDER: 1.0x
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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.