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
1. With the scan tool, read DTCs.
  Are any DTCs present for Inlet Air Pressure Sensor or Boost Pressure Sensor?
  
  Yes
  - Troubleshoot other DTCs first.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 2
INTERMITTENT CONDITION
1. Start the engine.
2. Using the accelerator pedal, accelerate the engine speed to high idle and hold the engine speed at high idle for at least 20 seconds.
  Does DTC P0049 become active?
  
  Yes
  - Go To 3
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
TURBOCHARGER SPEED SENSOR

Fig 1: Checking Turbocharger Speed Sensor
Courtesy of CHRYSLER GROUP, LLC
1. Turn Ignition off.
2. Disconnect the Turbocharger Speed Sensor connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance across the (K540) Turbocharger Speed Sensor Signal circuit and the (K541) Turbocharger Speed Sensor Return circuit at the Turbocharger Speed Sensor.
  Is the resistance between 600 and 1600 Ohms?
  
  Yes
  - Go To 4
  No
  - Replace the Turbocharger Speed Sensor in accordance with the Service Information. Refer to SENSOR, TURBOCHARGER SPEED, REMOVAL, 6.7L .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K540) TURBO SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking Turbo Speed Sensor Signal Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (K540) Turbocharger Speed Sensor Signal circuit at the Turbocharger Speed Sensor connector.
  Is the resistance greater than 10k Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (K540) Turbocharger Speed Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K540) TURBO SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance of the (K540) Turbocharger Speed Sensor Signal circuit between the Turbocharger Speed Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (K540) Turbocharger Speed 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 (K541) TURBO SPEED SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (K541) Turbocharger Speed Sensor Return circuit between the Turbocharger Speed Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 7
  No
  - Repair the (K541) Turbocharger Speed Sensor Return circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
POWERTRAIN CONTROL MODULE
1. Disconnect all PCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Freeze Frame and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read PCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, 6.7L DIESEL, REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Test complete.
  - Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .