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 there are any 5-Volt supply DTCs 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 return?
  
  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 CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 1: Checking Exhaust Pressure Sensor Signal Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Exhaust Pressure Sensor harness connector.
3. Disconnect the PCM C1 harness connector.
4. Measure the resistance of the (K355) Exhaust Pressure Sensor Signal circuit between the Exhaust Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3.
  No
  - Repair the (K355) Exhaust Pressure Sensor Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K355) EXHAUST PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Exhaust Pressure Sensor 1 Connector Pin ID & Negative Battery Cable
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (K355) Exhaust Pressure Sensor Signal circuit at the Exhaust Pressure Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K355) Exhaust Pressure Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK FOR THE (K355) EXHAUST PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K916) SENSOR GROUND CIRCUIT

Fig 3: Checking For Exhaust Pressure Sensor Signal Circuit Shorted To Sensor Ground Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K355) Exhaust Pressure Sensor Signal circuit and the (K916) Sensor Ground circuit at the Exhaust Pressure Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K355) Exhaust Pressure Sensor Signal circuit and the (K916) Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK THE EXHAUST PRESSURE SENSOR

Fig 4: Exhaust Pressure Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Reconnect the PCM C1 harness connector.
2. Turn the ignition on.
3. While monitoring scan tool, connect a jumper across the (F857) 5-Volt supply circuit and the (K355) Exhaust Pressure Sensor Signal circuit at the Exhaust Pressure Sensor harness connector.
  Did the scan tool display DTC P0473 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 .