Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM2000RAM 2500 VAN V8-5.2L CNG VIN TREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSRECALL - REPROGRAM PCM/CATALYST FAULTS GO UNDETECTEDSERVICE PROCEDUREA. REPROGRAM THE PCM
2000 Dodge and Ram RAM 2500 Van V8-5.2L CNG VIN T
A. Reprogram the PCM
2000 Dodge and Ram RAM 2500 Van V8-5.2L CNG VIN TSECTION A. Reprogram the PCM
The MDS2 (Mopar Diagnostic System) with the DRB III(R) (Diagnostic Readout Box scan tool) operating at CIS CD2046 or higher is required to perform this repair.
1. Log onto the MDS2 system.
2. Connect the MDS2 (Mopar Diagnostic System) and DRB III (Scan Tool) to the vehicle and switch the IGNITION KEY TO "ON".
3. Use the arrow keys and select # 2 CONNECT TO MDS2 on the DRB III MAIN MENU SCREEN.
4. Use the arrow keys and select # 2 RUN MDS2 APPLICATION on the DRB III MAIN MENU SCREEN.
NOTE:
Once MDS2, DRB III and vehicle communication have been established, the CANNOT READ VIN FROM DRB III message will be replaced by the VEHICLE VIN. Press the "OK" button to request a MD52 SESSION FOR THE VEHICLE VIN INDICATED. Press the "OK" button when asked to begin the session.
5. Push the FLASH TAB on the MD52.
6. Select READ PART NUMBERS FROM VEHICLE and click SHOW UPDATES on the MDS2. Press the "OK" button.
NOTE:
If the PCM on the vehicle has already been updated or reprogrammed, a Flash Update Information Box will appear that says "Part number (updated part number is displayed) is up to date and does not require any new updates." Verify that the part number of the PCM (or previously installed authorized software update label) matches the part number displayed on the MDS. Press the "OK" button, then continue with Step C.
7. Select the NEW SOFTWARE PART NUMBER with the light pen and click UPDATE CONTROLLER SOFTWARE.
8. The MDS2 and DRB III will prompt for any operator action needed during the remainder of the reprogramming process.
NOTE:
Due to the PCM flash procedure, diagnostic trouble codes (DTC's) may be set in other modules (ETAX, BCM, MIC, SKIM, ABS) within the vehicle (if so equipped). Some DTC's may cause the Malfunction Indicator Light (MIL) to illuminate. All of the DTC's relate to a loss of communications with the module that is being flashed. Check all modules. record the trouble codes. and erase the trouble codes prior to returning the vehicle to the customer. Erase any trouble codes in the PCM only after all other modules have had their trouble codes erased.
1. Log onto the MDS2 system.
2. Connect the MDS2 (Mopar Diagnostic System) and DRB III (Scan Tool) to the vehicle and switch the IGNITION KEY TO "ON".
3. Use the arrow keys and select # 2 CONNECT TO MDS2 on the DRB III MAIN MENU SCREEN.
4. Use the arrow keys and select # 2 RUN MDS2 APPLICATION on the DRB III MAIN MENU SCREEN.
NOTE:
Once MDS2, DRB III and vehicle communication have been established, the CANNOT READ VIN FROM DRB III message will be replaced by the VEHICLE VIN. Press the "OK" button to request a MD52 SESSION FOR THE VEHICLE VIN INDICATED. Press the "OK" button when asked to begin the session.
5. Push the FLASH TAB on the MD52.
6. Select READ PART NUMBERS FROM VEHICLE and click SHOW UPDATES on the MDS2. Press the "OK" button.
NOTE:
If the PCM on the vehicle has already been updated or reprogrammed, a Flash Update Information Box will appear that says "Part number (updated part number is displayed) is up to date and does not require any new updates." Verify that the part number of the PCM (or previously installed authorized software update label) matches the part number displayed on the MDS. Press the "OK" button, then continue with Step C.
7. Select the NEW SOFTWARE PART NUMBER with the light pen and click UPDATE CONTROLLER SOFTWARE.
8. The MDS2 and DRB III will prompt for any operator action needed during the remainder of the reprogramming process.
NOTE:
Due to the PCM flash procedure, diagnostic trouble codes (DTC's) may be set in other modules (ETAX, BCM, MIC, SKIM, ABS) within the vehicle (if so equipped). Some DTC's may cause the Malfunction Indicator Light (MIL) to illuminate. All of the DTC's relate to a loss of communications with the module that is being flashed. Check all modules. record the trouble codes. and erase the trouble codes prior to returning the vehicle to the customer. Erase any trouble codes in the PCM only after all other modules have had their trouble codes erased.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.