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Home >> Jeep >> 2013 >> Compass Limited, AWD, Trans Mfr CD CVT2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE Automatic Transmission) >> DTC Troubleshooting >> P0602-Control Module Programming Error/Not Programmed >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2009 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

The controller is programmed during manufacturing with generic software to facilitate testing. This software does not have the proper calibrations to control a transmission in a vehicle. The check for generic software is made at power-up. If generic software is found, the MIL will light immediately and the MIL will stay on even if the fault is cleared, until the proper software is installed. Note: Transmission will be placed in limp-in mode.