This bulletin applies to the 2003 Chrysler 300M. The MIL may illuminate due to erroneous detection DTCs (where DTCs may or may not actually be present):
P0335 (crankshaft position sensor circuit)
P0340 (camshaft position sensor circuit)
P0462 (fuel level sending unit volts too low)
P0499 (NVLD canister vent valve solenoid circuit high)
P0622 (generator field not switching properly)
P0660 (manifold tune valve solenoid circuit)
P1604 (PCM internal RAM integrity failure)
P1681 (no fuel level BUS message)
P1698 (no CCD/J1850 message from TCM)
Using a scan tool (DRB III) with the appropriate diagnostic procedures manual, verify that all engine systems are functioning as designed. If DTCs are present other than those listed here, record them and repair as necessary before proceeding further.
1. Connect a battery charger and set as close to 14 volts as possible.
2. Flash the PCM using the MDS2 and DRB III scan tool.
3. Due to PCM reprogramming, a DTC may be set in other modules (TCM, BCM, MIC, SKIM, etc.). Some DTCs may cause the MIL to illuminate. All DTCs relate to a loss of communication with the module that is being reprogrammed. Check all modules, record faults and erase all DTCs.
4. Type the necessary information on the Authorized Software Update (P/N 04669020) and attach the label to the PCM and cover the label with the clear plastic overlay.
5. Type the necessary information on the Authorized Modification label (P/N 04275086AB) and attach near the VECI label.
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