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Pinpoint Test N : U0100:00, U0140:00, U0256:00: Notes

Normal Operation and Fault Conditions 

The HSWM communicates over the MS-CAN with various modules. A DTC sets if the HSWM does not receive an expected message from one of the modules within a predetermined period of time.

HSWM DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information Sets when the HSWM does not receive an expected message from the PCM for more than 5 seconds.
U0140:00 Lost Communication With Body Control Module: No Sub Type Information Sets when the HSWM does not receive an expected message from the BCM for more than 5 seconds.
U0256:00 Lost Communication With Front Controls Interface Module "A": No Sub Type Information Sets when the HSWM does not receive an expected message from the FCIM for more than 5 seconds.

Possible Causes 

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