Manifold absolute pressure (map) sensor-4.7L v-8 engine. Powertrain control module (pcm)

Manifold absolute pressure (map) sensor-4.7L v-8 engine

The MAP sensor is located on the front of the intake manifold (Fig. 28). An o-ring seals the sensor to the intake manifold.

Fig. 28 MAP and ECT Sensor Locations-4.7L V-8 Engine

1 - ECT SENSOR

2 - MOUNTING BOLTS (2)

3 - MAP SENSOR

4 - INTAKE MANIFOLD

REMOVAL

(1) Disconnect electrical connector at sensor.

(2) Clean area around MAP sensor.

(3) Remove 2 sensor mounting bolts (Fig. 28).

(4) Remove MAP sensor from intake manifold.

INSTALLATION

(1) Clean MAP sensor mounting hole at intake manifold.

(2) Check MAP sensor o-ring seal for cuts or tears.

(3) Position sensor into manifold.

(4) Install MAP sensor mounting bolts (screws).

Tighten screws to 3 N*m (25 in. lbs.) torque.

(5) Connect electrical connector.

Powertrain control module (pcm)

The PCM is located in the engine compartment (Fig. 29).

Fig. 29 PCM Location and Mounting

1 - RIGHT FRONT FENDER

2 - PCM MOUNTING BOLTS (3)

3 - 32-WAY CONNECTORS (3)

4 - COVER

5 - POWERTRAIN CONTROL MODULE (PCM)

REMOVAL

To avoid possible voltage spike damage to the PCM, ignition key must be off, and negative battery cable must be disconnected before unplugging PCM connectors.

(1) Disconnect negative battery cable at battery.

(2) Remove cover over electrical connectors. Cover snaps onto PCM.

(3) Carefully unplug the three 32-way connectors from PCM.

(4) Remove three PCM mounting bolts and remove PCM from vehicle.

INSTALLATION

(1) Install PCM and mounting bolts to vehicle.

(2) Tighten bolts to 3-5 N*m (30-40 in. lbs.).

(3) Check pin connectors in the PCM and the three 32-way connectors for corrosion or damage. Repair as necessary.

(4) Install three 32-way connectors.

(5) Install cover over electrical connectors. Cover snaps onto PCM.

(6) Install battery cable.

(7) Use the DRB scan tool to reprogram new PCM with vehicles original Identification Number (VIN) and original vehicle mileage. If this step is not done, a Diagnostic Trouble Code (DTC) may be set.