DTC B335: Loss Of Combo Panel Data: Description

Code B335 will set if the ignition is ON and the BCM loses data communication with the Combo Panel. Since a loss of data communication with the Combo Panel will result in a SYSTEM FAULT display, this code can only be recognized as a HISTORY code. During this event, the HVAC will divert to 75°F set temperature, front defrost air delivery and automatic blower control.

With a two-way, redundant communication ability built into this system, a double open in the data line must occur to set the fault. A single fault, however, in the Combo Panel power or ground or a loss of +10 volt wake-up to the combo panel would also cause this code to set.

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

Fig 1: DTC B335: Loss Of Combo Panel Data

Courtesy of GENERAL MOTORS CORP.