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Pinpoint Test E : U0164: Notes

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DTC Fault Trigger Condition-PCM 

DTC Description Fault Trigger Conditions
U0164 Lost Communication With HVAC Control Module The FCIM controls the HVAC control module functions. The PCM sets this DTC if data messages from the HVAC control module through the GWM are missing.

Normal Operation and Fault Conditions 

The HVAC control module functions are performed by the FCIM. REFER to: MODULE COMMUNICATIONS NETWORK (1 OF 2) .

Possible Sources 

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