Drivetrain Control Module (DTCM)

U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Continuously with the ignition on, one valid CAN message received at least once.

- Set Condition:
When the Drain Train Control Module (DTCM) detects an incorrect CAN message from the Power Control Module (PCM).





1. VERIFY THE DTC IS ACTIVE

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.

Is the DTC active at this time?

Yes

- Go To 2

No

- Go To 4

2. CHECK IF BCM CAN BUS DTCs ARE PRESENT
1. With the scan tool, read BCM DTCs.

Are there any BCM CAN BUS DTCs present?

Yes

- Perform the appropriate diagnostic procedure. . Testing and Inspection

No

- Go To 3

3. CHECK TO SEE ANY IF POWERTRAIN CONTROL MODULE (PCM) DTCS ARE PRESENT
1. With the scan tool, read PCM DTCs.

Are there any PCM DTCs present?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection.

No

- Replace the Drive Train Control Module (DTCM). Drivetrain Control Module - Removal.
- Perform the 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 the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Test complete.