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Pinpoint Test M : U0140:00: Notes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation 

The TCCM sets the DTC U0155 when key messages are not received for longer than 5 seconds. This loss of key messages degrades the 4x4 system performance and/or inability to change 4x4 modes. Other modules that require data from the IPC module all set communication DTCs and may also exhibit system function concerns.

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0155:00 Lost Communication With Instrument Panel Cluster (IPC): No Sub Type Information Sets in continuous memory in the TCCM if IPC data messages received from the IPC over the HS-CAN are missing for longer than 5 seconds.

U0140:00 

Refer to Wiring Diagram Four Wheel Drive Systems for schematic and connector information.

Normal Operation and Fault Conditions 

Terrain Management Module DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0140:00 Lost Communication With Body Control Module: No Sub Type Information Sets in continuous memory in the ATCM if data messages received from the BCM through the GWM are missing for 5 seconds or longer.

Possible Sources 

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