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 TEMPERATURE SENSOR 1/1 SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Exhaust Temperature Sensor Signal Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Exhaust Gas Temperature Sensor 1/1.
3. Disconnect the PCM C2 harness connector.
4. Measure the resistance between ground and the (K185) Exhaust Temperature Sensor 1/1 Signal circuit at the Exhaust Gas Temperature Sensor 1/1 harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K185) Exhaust Gas Temperature Sensor 1/1 Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK FOR THE (K185) EXHAUST TEMPERATURE SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT

Fig 2: Checking For Exhaust Temperature Sensor Signal Circuit Shorted To Sensor Ground Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance between the (K185) Exhaust Temperature Sensor 1/1 Signal circuit and (K900) Sensor Ground circuit at the PCM C2 harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K185) Exhaust Temperature Sensor 1/1 Signal circuit and (K900) Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE EXHAUST GAS TEMPERATURE SENSOR
1. Reconnect the Exhaust Gas Temperature Sensor 1/1 harness connector.
2. Reconnect the PCM C2 harness connector.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 75 seconds.
6. Disconnect the Exhaust Gas Temperature Sensor 1/1 harness connector.
7. Turn the ignition on.
8. With the scan tool, read DTCs.
  Does DTC P0546 become active?
  
  Yes
  - Replace the Exhaust 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 .