jeep Workshop Repair Guides

Jeep Grand Cherokee Workshop Service and Auto Repair Manuals

Main Relay (Computer/Fuel System) > < Engine Control Module (ECM)|Page 4015
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6. Connect negative battery cable.
7. Use a diagnostic 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. 

Main Relay (Computer/Fuel System) > < Engine Control Module (ECM)|Page 4015