Test NTC-10: Checking Manifold Absolute Pressure (Map) Sensor Calibration

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

Ensure engine is 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 above idle.
Note engine vacuum on vacuum gauge. Using scan tool, read Manifold Absolute Pressure (MAP) sensor vacuum. If MAP sensor vacuum is within one in. Hg of engine vacuum on vacuum gauge, MAP sensor is operating properly. Test is complete. If MAP sensor vacuum is not within one in. Hg of engine vacuum on vacuum gauge, replace MAP sensor. See Fig 1 -Fig 3 . Perform TEST VER-2A .

Fig 1: Locating MAP Sensor (2.4L)
Courtesy of DAIMLERCHRYSLER CORPORATION

Fig 2: Locating MAP Sensor (3.0L)
Courtesy of DAIMLERCHRYSLER CORPORATION

Fig 3: Locating MAP Sensor (3.3L & 3.8L)
Courtesy of DAIMLERCHRYSLER CORPORATION