DTC B336: Loss Of IPC Data: Description

Code B336 will set if the ignition is ON and the BCM loses data communication with the IPC, The problem is a result of a system voltage power or ground fault to the IPC, or a double open circuit in the data communication line between the IPC and the BCM or a loss of +10 volt wake-up to the IPC. If this occurs, the cruise control will disengage (if ON) and the headlamps (if ON) will be on low beams.

NOTE: Numbers in list refer to circled numbers in diagnostic flow chart, see Fig 1 . For circuit identification, see Figure .

Fig 1: DTC B336: Loss Of IPC Data

Courtesy of GENERAL MOTORS CORP.