B335

Code B335 & B336:

Data Circuit:

CODE B335

CIRCUIT DESCRIPTION:

This code can only be viewed as a history code since if it was current, service diagnostics could not be entered. Most likely the ECC controls for heating and air conditioning will also be inoperative when the loss of serial data occurs.

Since the serial data lines are redundant, a double open in the 800 CKT 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 ECC.

CODE B336

CIRCUIT DESCRIPTION:

This code can only be viewed as a history code since if it was current, service diagnostics could not be entered. Since serial data, +7.0 volts, and ground terminals are redundant, it would take a double open in any of those circuits to set the code. A single intermittent open in CKT 343 would set the code.

If codes are intermittent careful checking of all terminal contacts is required prior to any parts being replaced.