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Pinpoint Test AY : U0164:00 And U0424:82: Notes

Normal Operation and Fault Conditions 

IPC DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information Sets in continuous memory in the IPC if data messages received from the HVAC module over the are missing for 5 seconds or longer.
U0424:82 Invalid Data Received From HVAC Control Module: Alive/Sequence Counter Incorrect/Not Updated Sets in continuous memory in the IPC if invalid data messages received from the HVAC module for 5 seconds or longer.

Possible Sources 

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