Code B335: Loss Of ECCP Serial Data
This code can only be viewed as a "history" code, because if it was current, service diagnostics could not be entered. Most likely the ECC controls for heating and A/C will also be inoperative when the loss of serial data occurs.
Since the serial data lines are redundant, a double open in the circuit No. 800 has to occur to set this code. However, the code will also set for a single open in the power or ground supply to the ECCP.
NOTE:
Loss of ECCP ground will cause data line circuit No. 800 to be tied to system voltage, disabling all vehicle self-diagnostics.