Diagnostic Test

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

ACTIVE DTC
NOTE:
If any 5-Volt supply DTCs are present, repair those DTCs before proceeding.
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 - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (K355) EXHAUST PRESSURE SENSOR SIGNAL FOR A SHORT TO VOLTAGE

Fig 1: Exhaust Pressure Sensor 1 Connector Pin ID & Battery Negative Cable
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Exhaust Pressure Sensor harness connector.
3. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
4. Remove the ASD/Main Relay.
5. Connect a jumper between cavity 30 and cavity 87 of the ASD/Main Relay connector.
6. Turn the ignition on.
7. Measure the voltage on the (K355) Exhaust Pressure Sensor Signal circuit at the Exhaust Pressure Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K355) Exhaust Pressure Sensor Signal circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK THE (K916) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 2: Checking Exhaust Pressure Sensor Ground Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance of the (K916) Sensor Ground circuit between the Exhaust Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the (K916) Sensor Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE EXHAUST PRESSURE SENSOR

Fig 3: Exhaust Pressure Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Reconnect the PCM C1 harness connector.
2. Turn the ignition on.
3. While monitoring the scan tool, connect a jumper across the (K355) Exhaust Pressure Sensor Signal circuit and the (K916) Sensor Ground circuit at the Exhaust Pressure Sensor harness connector.
  Did the scan tool display DTC P0472 active?
  
  Yes
  - Replace the Exhaust Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION 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 - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .