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Home >> Jeep >> 2002 >> Wrangler SE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Engine Component Tests >> Engine Sensors & Switches >> Checking Map Sensor Operation
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Checking Map Sensor Operation

NOTE: For connector identification, see CONNECTOR IDENTIFICATION  . For component location, see COMPONENT LOCATIONS  . For circuit identification and wiring diagram, see WIRING DIAGRAMS article. After each repair procedure has been completed, reconnect all components.

Turn ignition off. Install vacuum "T" fitting and vacuum gauge at vacuum source on intake manifold. Start engine and allow engine to idle. If engine will not idle, maintain a constant RPM greater than idle. Note engine vacuum on vacuum gauge. With DRBIII(R), monitor MAP sensor vacuum. Compare the MAP Sensor vacuum value on the DRBIII(R) and the vacuum reading on the vacuum gauge. Are the vacuum readings within one in. Hg of engine vacuum of each other? If yes, MAP sensor is operating properly. Test is complete. If no, replace MAP sensor. Perform POWERTRAIN VERIFICATION TEST VER-2  under VERIFICATION TESTS.

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