Module - Powertrain Control: 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 the DRB 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 DRB 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.

Fig 1: Removing PCM Is Attached To Right-Inner Corner Of Engine Compartment

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

The PCM (1) is attached to the right-inner corner of the engine compartment.

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.

Disconnect and isolate the negative battery cable.
Carefully unplug the four 38-way connectors (2) from PCM.

Fig 2: Removing PCM Mounting Bolts, And Position Ground Strap
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Remove three PCM mounting bolts (2), and position ground strap (4). Remove PCM from vehicle.