Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Start the engine and test drive the vehicle.
2. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (K682) EGR CONTROL 1 CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the EGR Valve harness connector.
3. Disconnect the PCM C2 harness connector.
4. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
5. Measure the resistance of the (K682) EGR Control 1 circuit between the EGR Valve harness connector and the GPEC Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (K682) EGR Control 1 circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (K684) EGR CONTROL 2 CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (K684) EGR Control 2 circuit between the EGR Valve harness connector and the GPEC Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (K684) EGR Control 2 circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (K682) EGR CONTROL 1 CIRCUIT AND (K684) EGR CONTROL 2 CIRCUIT FOR A SHORT TO VOLTAGE
NOTE:
If one of the EGR Control circuits is shorted to another 12 volt supply, the internal PCM driver may get damaged causing the an open on the EGR Control circuitry.
1. Measure the resistance between the:
  - (K682) EGR Control 1 circuit and all other circuits at the GPEC Adaptor.
  - (K684) EGR Control 2 circuit and all other circuits at the GPEC Adaptor.
  Is the resistance above 100k Ohms between the EGR Control circuits and all other circuits?
  
  Yes
  - Go To 5
  No
  - Repair the short between the EGR Control circuit and the circuit that measured below 100k Ohms.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
EGR VALVE
1. Replace the EGR Valve in accordance with the service information.
2. Reconnect the EGR Valve harness connector.
3. Reconnect the PCM C2 harness connector.
4. Turn the ignition on.
5. With the scan tool, erase DTCs.
6. Start the engine and test drive the vehicle.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 6
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
POWERTRAIN CONTROL MODULE (PCM)
1. Perform any Service Bulletins that may apply.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Valve and the PCM.
3. Look for any chafed, pierced, pinched, or partially broken wires.
4. Look for broken, bent, pushed out or corroded terminals.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .