15.24.2 Glow control Unit LIN Bus (P0670, P064C)

General description: 

The ECU monitors the LIN-Bus from the glow ECU for several faults. The faults are:

• checksum error
• message timeout
• voltage difference system voltage - LIN-signal too high

If a fault is detected in two consecutive driving cycles, the MIL is illuminated.

Flowchart: 

Fig 1: Glow Control Unit LIN Bus Flowchart

Courtesy of BMW OF NORTH AMERICA, INC.