Differential

U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM

For a complete wiring diagram Refer to Diagrams/Electrical


- When Monitored:
Continuously with the ignition on, one valid CAN message received at least once, and no U0002-CAN C Bus Off Performance DTC present.

- Set Condition:
When the Final Drive Control Module detects an incorrect CAN message from the Power Control Module (PCM).







Diagnostic Test


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.

Turn the ignition on.
With the scan tool, record and erase DTC's.
Cycle the ignition switch from off to on.
With the scan tool, read DTC's.
Does the scan tool display: U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM?

Yes


- Go To 2


No


- Refer to the INTERMITTENT CONDITION diagnostic procedure.
- Perform FDCM VERIFICATION TEST. FDCM Verification Test


Diagnostic Test


2. CHECK IF TIPM CAN BUS DTC'S ARE PRESENT
With the scan tool, read TIPM DTCs.
Are there any TIPM CAN BUS DTC's present?

Yes


- Repair the DTC(s).
- Perform FDCM VERIFICATION TEST. FDCM Verification Test


No


- Go To 3



3. CHECK IF ENGINE DTC'S ARE PRESENT
With the scan tool, read Engine DTCs.
Are there any Engine DTC's present?

Yes


- Repair the DTC(s).
- Perform FDCM VERIFICATION TEST. FDCM Verification Test


No


- Using the schematics as a guide, check the FDCM pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the FDCM Control Module.
- Perform FDCM VERIFICATION TEST. FDCM Verification Test