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
NOTE:
If there are any 5-Volt supply DTCs present, repair those DTCs before proceeding with this test.
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 return?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE DEF AMBIENT AIR TEMPERATURE SENSOR
1. With the scan tool, Erase DTCs.
2. Turn the ignition off.
3. Disconnect the DEF Ambient Air Temperature Sensor harness connector.
4. Turn the ignition on.
5. With the scan tool, View DTCs.
  Did the DTC P00DC-DEF AMBIENT AIR TEMPERATURE SENSOR HIGH set as active?
  
  Yes
  - Replace the DEF Ambient Air Temperature Sensor in accordance with the service information. Refer to SENSOR, Diesel Exhaust Fluid Ambient Temperature , Removal .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK THE (G32) DEF AMBIENT AIR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking DEF Ambient Air Temperature Sensor Signal Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between ground and the (G32) DEF Ambient Air Temperature Sensor Signal circuit at the DEF Ambient Air Temperature Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the (G32) DEF Ambient Air Temperature Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR THE (G32) DEF AMBIENT AIR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO ANOTHER CIRCUIT
1. Measure the resistance between the (G32) DEF Ambient Air Temperature Sensor Signal circuit and the all other circuits at the PCM C2 harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information. Refer to MODULE, Powertrain Control, 6.7L Diesel [ETJ] , Removal .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair the short between the (G32) DEF Ambient Air Temperature Sensor Signal circuit and the circuit that measured below 10k Ohms.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .