Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
If a 5-Volt reference DTC is present, repair that DTC before proceeding with this test.
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Turn the ignition on.
6. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE FUEL PRESSURE SENSOR
1. Turn the ignition off.
2. Disconnect the FRP Sensor harness connector.
3. Turn the ignition on.
  Does the DTC P0193 set?
  
  Yes
  - Replace the Fuel Rail Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (K181) FRP SENSOR SIGNAL 1 CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between ground and the (K181) FRP Sensor Signal 1 circuit in the FRP Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K181) Fuel Rail Pressure Sensor Signal 1 circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK FOR THE (K181) FRP SENSOR SIGNAL CIRCUIT SHORTED TO THE (K180) SENSOR RETURN
1. Measure the resistance between the (K181) FRP Sensor Signal 1 circuit and (K180) Sensor Return circuit at the FRP Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K181) Fuel Rail Pressure Sensor Signal 1 circuit and (K180) Sensor Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE (K179) FRP SENSOR SIGNAL 2 CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between ground and the (K179) FRP Sensor Signal 2 circuit in the FRP Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K179) Fuel Rail Pressure Sensor Signal 2 circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 6
CHECK FOR THE (K179) FRP SENSOR SIGNAL 2 CIRCUIT SHORTED TO THE (K180) SENSOR RETURN
1. Measure the resistance between the (K179) FRP Sensor Signal 2 circuit and (K180) Sensor Return circuit at the FRP Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K179) Fuel Rail Pressure Sensor Signal 2 circuit and (K180) Sensor Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 7
CHECK THE (K180) SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (K180) Sensor Return circuit between the FRP Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Repair the (K180) Sensor Return circuit for an open circuit or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .