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.

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE:
Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
1. With the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2.
  No
  - Perform the STORED LOST COMMUNICATION DTCS diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read all active DTCs from all modules.
  NOTE:
  Check for TIPM configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
  
  Does the scan tool display any active DTCs to the conditions listed above?
  
  Yes
  - Perform the appropriate diagnostic procedure.
  No
  - Go To 3.
VERIFY THE PCM IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, select Network Diagnostics.
3. Verify the PCM is active on the bus.
  Is the PCM active on the bus?
  
  Yes
  - Go To 4.
  No
  - Perform the appropriate NO RESPONSE FROM PCM diagnostic procedure. Refer to NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (NGC) - 5.7L , or NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) - 6.7L .
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. With the scan tool, select Network Diagnostics.
  Is there more than one module with active DTCs "Logged Against" the PCM?
  
  Yes
  - Replace and program the PCM in accordance with the Service Information. Refer to MODULE, Powertrain Control , Removal MODULE, Powertrain Control, 6.7L Diesel [ETJ] , Removal .
  - Perform the appropriate POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST , or POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CLEAR DTC IN MODULE SETTING FAULT
1. With the scan tool, select the module setting the DTC against the PCM.
2. Clear active DTCs.
  Is this DTC still active?
  
  Yes
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6.
CYCLE IGNITION
1. Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.
  Does this DTC become active?
  
  Yes
  - Go To 7.
  No
  - The condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK FOR ADDITIONAL LOST COMMUNICATION FAULTS
1. With the scan tool, select Network Diagnostics.
  Does the TIPM and other CAN C BUS modules show Lost Communication with the remaining CAN C BUS modules?
  
  Yes
  - Go To 8.
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(D52) OR (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking CAN C Bus (+) Circuit
Courtesy of CHRYSLER LLC
1. Measure the voltage between the (D52) CAN C Bus (+) circuit and ground.
2. Measure the voltage between the (D65) CAN C Bus (+) circuit and ground.
  Is the voltage above 5 volts?
  
  Yes
  - Repair the short to voltage in the (D52) or (D65) CAN C Bus (+) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 9.
(D51) OR (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND

Fig 2: Checking CAN C Bus (-) Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (D51) CAN C Bus (-) circuit.
3. Measure the resistance between ground and the (D64) CAN C Bus (-) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to ground in the (D51) or (D64) CAN C Bus (-) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .