Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Ignition on, engine not running.
2. Record freeze frame data and clear DTCs.
3. Turn the ignition off for 75 seconds.
4. Start the engine and let idle for at least two minutes.
5. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (K365) FUEL CONTROL ACTUATOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Fuel Control Actuator (FCA) Connector Pin ID
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Fuel Control Actuator harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K365) FCA Driver circuit at the FCA harness connector.
  NOTE:
  The (K365) FCA Driver circuit should read between 3.5 Volts and 7.5 Volts.
  
  Is the voltage reading near battery voltage?
  
  Yes
  - Repair the (K365) FCA Driver circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK THE (K366) FUEL CONTROL ACTUATOR RETURN CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Fuel Control Actuator (FCA) Connector Pin ID
Courtesy of CHRYSLER LLC
1. Disconnect the PCM C1 harness connector.
2. Measure the voltage of the (K366) FCA Return circuit at the FCA harness connector.
  NOTE:
  The (K366) FCA Return circuit should not have voltage present.
  
  Is there any voltage present?
  
  Yes
  - Repair the (K366) FCA Return circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE (K366) FUEL CONTROL ACTUATOR DRIVER CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 3: Checking Fuel Control Actuator Driver Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance of the (K366) FCA Driver circuit between the FCA harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5.
  No
  - Repair the (K366) FCA Driver circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K365) FUEL CONTROL ACTUATOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 4: Checking Fuel Control Actuator Return Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K365) FCA Return circuit between the FCA harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6.
  No
  - Repair the (K365) FCA Return circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE FUEL DELIVERY SYSTEM
1. Perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure. Refer to Diagnosis and Testing , 6.7L .
  Were any issues found with the Fuel Delivery System?
  
  Yes
  - Perform the appropriate repair.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 7.
CHECK THE FUEL CONTROL ACTUATOR
1. Turn the ignition off.
2. Replace the Fuel Control Actuator in accordance with the service information.
3. Turn the ignition on.
4. With the scan tool, clear DTCs.
5. Start the engine.
6. With the scan tool, view DTCs.
  Did the DTC return?
  
  Yes
  - Go To 8.
  No
  - Test complete.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Control Actuator and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .