Code B336, Loss Of IPC Serial Data (TORONADO)

This code can only be viewed as a "History" code because if it was "Current Service Diagnostics" it could not be entered. Since serial data, +7 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 circuit No. 343 would set the code.

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

If IPC has a current loss of serial data, diagnostics cannot be displayed. Current faults are covered on charts B-1 or B-2. Code B336 indicates an intermittent has occurred. Should intermittent problem persist, check the following circuits for opens or poor terminal contacts.

If code continues to set and no other codes set that share above circuits, replace IPC. When all diagnosis and repairs are completed, clear codes and verify operation

Fig 1: Code B336, Schematic