Code B336, Loss Of IPC Serial Data

This code can only be viewed as a history code because if it was current, service diagnostics could not be entered. Since serial data, battery and ground terminals are redundant, a double open in any of those circuits would be necessary to set code. A single intermittent open in circuit No. 343 would also set code. If codes are intermittent, carefully check all terminal contacts before replacing any parts.

Fig 1: Code B336, Schematic, Loss of IPC Serial Data

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code B336, Harness View, Loss of IPC Serial Data

Courtesy of GENERAL MOTORS CORP.