Pinpoint Test M: Missing Or Invalid Data Received From Another Module
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Refer to Wiring Diagrams Two Wheel Drive/Four Wheel Drive Systems
for schematic and connector information. Refer to Wiring Diagrams Module Communications Network
for schematic and connector information.
Normal Operation and Fault Conditions
The TCCM and ATCM expect to receive network data from other modules on HS-CAN2. The TCCM and ATCM will set a DTC when it receives an invalid or incomplete message from other module. Incomplete or corrupted messages typically result from high network traffic preventing the complete message from being received within the calibrated time limit.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition TCCM U0439: 00 Invalid Data Received From All Terrain Control Module: No Sub Type Information The TCCM received an invalid mode of selection message from the ATCM. Mode changes may be prevented when this DTC is present. Possible Sources
- High network traffic event
- Intermittent network connection
- Suspect module
- M1 ATTEMPT TO DUPLICATE THE DTC (DIAGNOSTIC TROUBLE CODE)
- Enter the following diagnostic mode: Clear and Retest the TCCM or ATCMCMDTC self-test.
- Road test the vehicle.
- Enter the following diagnostic mode: TCCM or ATCMCMDTC self-test.
Did the invalid data DTC set again?
Yes GO to M2 No The system is operating correctly at this time. The concern may have been caused by a high network traffic event. - M2 INSPECT THE HS-CAN2 (HIGH-SPEED CONTROLLER AREA NETWORK 2) CONNECTORS
- Refer to Wiring Diagrams Module Communications Network for schematic and connector information.DISCONNECT and INSPECT the HS-CAN2 connectors between the TCCM or ATCM and the suspect module.
- Repair:
- corrosion (install new connector or terminals - clean module pins).
- damaged or bent pins - install new terminals/pins.
- pushed out pins - install new pins as necessary.
- Connect all connectors. Make sure each connector seats and latches correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes Check the OASIS for any applicable TSB. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSB address this concern, INSTALL a new suspect module. For U0439, REFER to: Transfer Case Control Module (TCCM) . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.