Drivetrain Control Module (DTCM)
U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM
For a complete wiring diagram, refer to the Wiring Information.
- When Monitored:
With the ignition on for four seconds, no CAN BUS circuit error condition present, no lost communication with PCM condition present, and no system undervoltage or overvoltage condition present.
- Set Condition:
The Drive Train Control Module (DTCM) is receiving implausible data for transfer case gear position, engine RPM, torque, or engine coolant temperature from the PCM.
1. 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
2. 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. Testing and Inspection.
No
- Go To 3
3. POWERTRAIN DTCs PRESENT
1. With the scan tool, read PCM DTCs.
Are there any active DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Testing and Inspection.
No
- Replace the Drive Train Control Module (DTCM).
- Perform DTCM VERIFICATION TEST. DTCM Verification Test.
4. 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. Transfer Case Verification Test.
No
- Test complete.