2007 dodge ram shows 4-wd maintenance light on dash
TSB - NUMBER: 03-001-07 ECM REFLASH GROUP: Differential & Driveline DATE: July 21, 2007 SUBJECT: 4WD System May Not Engage Or Disengage As Desired With "SERV 4WD" Message OVERVIEW: This bulletin involves replacement of the Front Axle Disconnect (FAD) actuator and selectively erasing and reprogramming the Totally Integrated Power Module (TIPM) with new software. MODELS: 2006 - 2007 (DR) Ram Truck (1500) NOTE: This bulletin applies to light duty 4x4 Ram Trucks built on or before June 01, 2007 (MDH 0601XX). SYMPTOM/CONDITION: The vehicle operator may experience one or more of the following conditions: A). The four wheel drive (4WD) system may not engage or disengage as designed, when the drive mode is changed between 2WD and either 4WD Auto or 4WD Lock (or back to 2WD from 4WD). B). An illumination of the “SERV 4WD” message in the Instrument Panel (IP) C). When four wheel drive (4WD) mode is selected, the amber “4WD” lamp flashes continuously in the IP signaling that the 4WD system has not been engaged. D). Diagnostic Trouble Code (DTC) C1464 - Front Axle Disconnect (FAD) High Side Short To Ground - is present in the TIPM. This condition may be due to TIPM software and its affect on the FAD actuator
You need to take it to the dealer and let them re flash the computer.
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