RAM 3500 Truck 2WD L6-5.9L DSL Turbo VIN C (2003)
Powertrain Control Module: Service and Repair
Engine Control Module Replacement
REMOVAL
The Engine Control Module (ECM) is bolted to a support bracket near the fuel filter. The support bracket mounts to the block with four capscrews and
vibration isolators. A ground wire is fastened to the bracket. The other end of the wire is fastened to the engine block.
1. Record any Diagnostic Trouble Codes (DTC's) found in the ECM.
To avoid possible voltage spike damage to either the Engine Control Module ECM, ignition key must be off, and negative battery cables must be
disconnected before unplugging ECM connectors.
2. Disconnect both negative battery cables at both batteries.
3. Remove the 50-way and 60-way connector bolts at the ECM. Note: The connector bolt is a female alien head. As bolt is being removed, very
car-fully remove connectors from the ECM.
Fig.3 Diesel ECM
4. Remove five ECM mounting bolts and remove ECM form the vehicle.
INSTALLATION
Do not apply paint to ECM. Poor ground will result.
1. Position ECM to ECM support bracket and install five mounting bolts. Tighten bolts to 24 Nm (18 ft. lbs.).
2. Check pin connectors in ECM and the 50-way and 60-way connectors for corrosion or damage. Repair as necessary.
3. Clean pins in the 50-way and 60-way electrical connectors with a quick-dry electrical contact cleaner.
4. Very carefully install the 50-way and 60-way connectors to ECM. Tighten connector alien bolts.
5. Install both negative battery cables.
6. Turn key to ON position. Without starting engine, slowly press throttle pedal to floor and then slowly release. This step must be done (one time) to
ensure accelerator pedal position sensor calibration has been learned by ECM. If not done, possible DTC's may be set.
7. Use DRB scan tool to erase any stored companion DTC's from ECM.
