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
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 (K185) EXHAUST GAS TEMPERATURE 1/1 SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Exhaust Gas Temperature Sensor 1 Connector Pin ID
Courtesy of CHRYSLER LLC
1. Ignition on.
2. Disconnect the Exhaust Gas Temperature Sensor 1/1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the voltage on the (K185) Exhaust Gas Temperature Sensor 1/1 Signal circuit at the Exhaust Gas Temperature Sensor 1/1 harness connector.
  Is the voltage above 5.1 Volts?
  
  Yes
  - Repair the (K185) Exhaust Gas Temperature Sensor 1/1 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 (K185) EXHAUST GAS TEMPERATURE SENSOR 1/1 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 2: Checking Exhaust Gas Temperature Sensor Signal Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance of the (K185) Exhaust Gas Temperature Sensor 1/1 Signal circuit between the Exhaust Gas Temperature Sensor 1/1 harness connector and the PCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the (K185) Exhaust Gas Temperature Sensor 1/1 Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K900) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 3: Checking Exhaust Gas Temperature Sensor Ground Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K900) Sensor ground circuit between the Exhaust Gas Temperature Sensor 1 harness connector and the PCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5.
  No
  - Repair the (K900) 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 TEMPERATURE SENSOR

Fig 4: Exhaust Temperature Sensor 1 Connector Pin ID
Courtesy of CHRYSLER LLC
1. While monitoring the scan tool, connect a jumper between the Exhaust Temperature Sensor 1/1 Signal circuit and (K900) Sensor Ground circuit at the Exhaust Temperature Sensor 1/1 harness connector.
  Does DTC P0545 become active?
  
  Yes
  - Replace the Exhaust Gas Temperature Sensor 1/1 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 .