Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

OTHER DTCS PRESENT
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Are either of the Exhaust Temperature Sensor (1/1, 1/2, or 1/3) Low or High DTCs present?
  
  Yes
  - Repair the other DTCs before proceeding.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 2
CHECK THE (K185) EXHAUST GAS TEMPERATURE SENSOR 1/1 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Disconnect the Exhaust Gas Temperature Sensor 1/1 harness connector.
  NOTE:
  Check Connectors-Clean/Repair as necessary.
4. 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 3
  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) EXHAUST GAS TEMPERATURE SENSOR 1/1 SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (K900) Sensor ground 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 (K900) Sensor ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
EXHAUST TEMPERATURE
1. Reconnect the PCM C2 connector and both Exhaust Temperature Sensor harness connectors.
2. With the scan tool, read the Exhaust Temperature Sensors to determine the exhaust temperature.
  Is the temperature reading above 225°F?
  
  Yes
  - Go To 5
  No
  - Go To 6
EXHAUST TEMPERATURE SENSOR 1/1, 1/2, AND 1/3
1. Start the engine.
2. Raise the engine speed to 2500 RPMs for two minutes.
  Do the temperature readings of Exhaust Temperature Sensors 1/1, 1/2, and 1/3 change in value at least 5°F?
  
  Yes
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
  No
  - Replace the Exhaust Temperature Sensor that did not change in value by at least 5°F or is not updating.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
EXHAUST TEMPERATURE SENSOR 1/1, 1/2 AND 1/3
1. Start the engine and allow it to idle for 10 minutes.
2. With the scan tool, read the values of Exhaust Temperature Sensors 1/1, 1/2, and 1/3.
  Do both temperature sensors read above 150°F and are the values of both temperature sensors updating?
  
  Yes
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
  No
  - Replace the Exhaust Temperature Sensor that is not above 150°F or is not updating on the scan tool.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .