Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. 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 reset?
  
  Yes
  - Go To 2
  No
  - Perform to the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE (F857) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 1: Inlet Air Temperature/Pressure Sensor & CAC/Boost Pressure Sensor Connector Pin ID
Courtesy of CHRYSLER GROUP, LLC
1. Ignition on.
2. Disconnect the Temperature/Pressure MAP (T/P MAP) Sensor harness connector.
3. With a voltmeter, measure the voltage of the (F857) 5-Volt Supply circuit at the T/P MAP Sensor harness connector.
  Is the voltage reading between 4.9 and 5.1 volts?
  
  Yes
  - Go To 3
  No
  - Repair the (F857) 5-Volt Supply circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE BOOST PRESSURE SENSOR

Fig 2: MAP Pressure Sensor Harness Connector
Courtesy of CHRYSLER GROUP, LLC
1. While monitoring the scan tool, connect a jumper between the (F857) 5-Volt Supply circuit and the (K37) Boost Pressure Sensor Signal circuit at the T/P MAP Sensor harness connector.
  Did the P0108 DTC set?
  
  Yes
  - Replace the Temperature/Pressure MAP Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK FOR THE (K37) BOOST PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K916) BOOST PRESSURE SENSOR RETURN CIRCUIT

Fig 3: Checking For Boost Pressure Sensor Signal Circuit Shorted To Boost Pressure Sensor Return Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance between the (K37) Boost Pressure Sensor Signal circuit and (K916) Sensor Ground circuit at the T/P MAP Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K37) Boost Pressure Sensor Signal circuit and (K916) Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE (K37) BOOST PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 4: Inlet Air Temperature/Pressure Sensor & CAC/Boost Pressure Sensor Connector Pin ID
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (K37) Boost Pressure Sensor Signal circuit.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K37) Boost Pressure Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 6
CHECK THE (K37) BOOST PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (K37) Boost Pressure Sensor Signal circuit between the T/P MAP Sensor and the PCM C1 harness connectors.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Repair the (K37) Boost Pressure Sensor Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .