DTC 038

Diagnostic Trouble Code Chart (Part 1 Of 2):

Diagnostic Trouble Code Chart (Part 2 Of 2):

Wiring Schematics:

CIRCUIT DESCRIPTION
UART-based communication Systems have a master of the serial data line and remote transceivers. The master controls the message trafficon 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 036 is set.

CONDITIONS FOR CLEARING THE MIL/DTC
Using a Scan Tool.

TEST DESCRIPTION
5. Determines it the DTC was set in error or if the HVAC programmer is the fault.