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.

CHECK FOR DTC U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Cycle the ignition switch from off to on.
4. With the scan tool, read DTCs.
  Does the scan tool display: U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM?
  
  Yes
  - Go To 2.
  No
  - Go To 4.
CHECK IF TIPM CAN BUS DTCS ARE PRESENT
1. With the scan tool, read TIPM DTCs.
  Are there any TIPM CAN BUS DTC's present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to appropriate Electrical Diagnostic Information .
  No
  - Go To 3.
POWERTRAIN DTCS PRESENT
1. With the scan tool, read PCM DTCs.
  Are there any active DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to appropriate Electrical Diagnostic Information .
  No
  - Replace the Drive Train Control Module (DTCM) in accordance with the Service Information.
  - Perform DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
4. Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Test complete.