RAM 1500 Truck 4WD V8-4.7L (2008)
Engine Control Module: Service and Repair
Powertrain Control Module - Removal
REMOVAL
CAUTION: Certain ABS systems rely on having the Powertrain Control Module (PCM) broadcast the Vehicle Identification Number (VIN)
over the bus network. To prevent problems of DTCs and other items related to the VIN broadcast, it is recommend that you disconnect the
ABS CAB (controller) temporarily when replacing the PCM. Once the PCM is replaced, write the VIN to the PCM using a scan tool. This is
done from the engine main menu. Arrow over to the second page to "1. Miscellaneous". Select "Check VIN" from the choices. Make sure it has
the correct VIN entered before continuing. When the VIN is complete, turn off the ignition key and reconnect the ABS module connector. This
will prevent the setting of DTCs and other items associated with the lack of a VIN detected when you turn the key ON after replacing the PCM.
CAUTION: Use the scan tool to reprogram the new PCM with the vehicles original identification number (VIN) and the vehicles original
mileage. If this step is not done, a Diagnostic Trouble Code (DTC) may be set.
The PCM (1) is located in the engine compartment attached to the dash panel (3).
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 (four 38-way connectors if equipped with NGC) from PCM (1).
4. Remove three PCM mounting bolts (4) and remove PCM from vehicle.
