Attach the sensor electrical connector.Install the sensor onto the intake manifold and tighten the mounting screws to 35 inch lbs.

Unfasten the mounting screws, then remove the MAP sensor from the vehicle.

Detach the electrical connector from the MAP sensor.

On the 3.0L engine only, disconnect the vacuum hose from the MAP sensor.

The MAP sensor is mounted on the intake manifold near the throttle body inlet to the manifold.

If not, repair or replace the wire harness as required.

There should also be 4.5-5.5 volts at terminal 61 of the PCM.

The voltage should be about 4.5-5.5 volts.

Test the MAP sensor supply voltage between the sensor connector terminals A and B (2.4L, 3.3L and 3.8L engines) r A and C (3.0L engine) with the ignition key in the ON position.

Test the MAP sensor ground circuit at the sensor connector terminal A (2.4L, 3.3L and 3.8L engines) or C (3.0L engine) and PCM terminal 43.

Test the PCM terminal 36 for the same voltage described in the previous step to make sure the wire harness is OK.

The voltage should fall to 1.5-2.1 volts with a hot, neutral idle speed condition.

With the ignition switch ON and the engine not running, the output voltage should be 4-5 volts.

Test the MAP sensor output voltage at the sensor connector between terminals B and C (2.4L, 3.3L and 3.8L engines), or A nd B (3.0L engine).

7: Using a digital volt-ohmmeter, test the MAP sensor voltage-3.0L engine shown 6: MAP sensor connector terminal identifications-2.4L, 3.3L and 3.8L enginesįig. 5: MAP sensor connector terminal identifications: (A) 5-volt supply, (B) sensor signal, (C) ground-3.0L engine shownįig.

Visually check the connector, making sure it is attached properly and that all of the terminals are straight, tight and free of corrosion.įig.

When testing the MAP sensor, make sure the harness wires do not become damaged by the test meter probes. 4: Disengage the MAP sensor connector-3.0L engine shown The sensor connects electrically to the PCM.įig. The MAP sensor is mounted to the intake manifold, near the throttle body inlet to the manifold. Based on the MAP sensor voltage and inputs from other sensors, the PCM adjusts spark advance and the air/fuel ratio. While the engine operates, the PCM figures out intake manifold pressure from the MAP sensor voltage. With the ignition key ON, before the engine is started, the PCM determines atmospheric air pressure from the MAP sensor voltage. Also, as vacuum decreases, the MAP sensor voltage increases proportionally. As vacuum increases, the MAP sensor voltage decreases proportionately.

The PCM monitors the MAP sensor output voltage. The MAP sensor then converts the intake manifold pressure into voltage. The PCM supplies 5 volts of direct current to the Manifold Absolute Pressure (MAP) sensor. 3: MAP sensor location-3.3L and 3.8L engines

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