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Home >> Jeep >> 1993 >> Grand Cherokee Base, 5.2 Y, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.2L >> No Fault Tests >> Test NF-6A - Checking Map Sensor Calibration

Test NF-6A - Checking Map Sensor Calibration

  1. Turn engine off. Install vacuum "T" in Manifold Absolute Pressure (MAP) sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. If engine will not idle, maintain a constant RPM above idle.
  2. Using DRB-II, read MAP sensor value. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor. Perform TEST VER-2 .
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