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Home >> Jeep >> 2004 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Electronic Control Modules >> Powertrain Control Module >> Removal
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Powertrain Control Module: Removal

USE THE DRB SCAN TOOL TO REPROGRAM THE NEW POWERTRAIN CONTROL MODULE (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 is located in the engine compartment near the battery.

Fig 1: Removing & Installing PCM
G01744698Courtesy of DAIMLERCHRYSLER CORP.

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.