Final Drive Control Module (FDCM)

U0401-IMPLAUSIBLE DATA RECEIVED FROM PCM



- 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).





1. CHECK FOR DTC U0401-IMPLAUSIBLE DATA RECEIVED FROM 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 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 DTCs present?

Yes

- Testing and Inspection Perform the appropriate CAN Bus diagnostic procedure.

No

- Go To 3

3. PCM DTCS ARE PRESENT
1. With the scan tool, read Powertrain Control Module DTCs.

Are there any PCM DTCs present?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Replace the Final Drive Control Module (FDCM).
- Perform FDCM VERIFICATION TEST. FDCM 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 the FDCM VERIFICATION TEST. FDCM Verification Test.

No

- Test complete.