B1038

DTC B1038 Loss of Serial Data (UART):

CIRCUIT DESCRIPTION
UART-based communication Systems have a master of the serial data line and remote transceivers. The master controls the message traffic on the serial data line by polling the HVAC programmer. The master then waits for the proper response.

CONDITIONS FOR SETTING THE DTC
^ The ignition is on.
^ The circuit is open or shorted.

ACTION TAKEN WHEN THE DTC SETS
Code DTC B1038 is set.

CONDITIONS FOR THE CLEARING THE DTC
Using a Scan Tool.