64 99... Fault 1.1 Combustion air blower
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 BMW 540i, 2002 BMW 540i, 2001 BMW 540i, 2000 BMW 540i, and 1999 BMW 540i. However, it is still accessible from the selected car via links, so may be relevant.
Instruction:
Measure voltage on combustion air blower with peripheral box. See appropriate SYSTEM WIRING DIAGRAM.
Specified value : 6 V (+/- 1 V)
COMBUSTION AIR BLOWER FAULT DESCRIPTION
| Question | Measure | |
|---|---|---|
| Is supply voltage O.K.? | No | Replace independent parking heater control unit, refer to 64 12 520 REMOVING AND INSTALLING / REPLACING CONTROL UNIT WITH HEAT EXCHANGER (THERMO TOP S) |
| Yes | ||
| Replace combustion air blower, refer to 64 12 530 REMOVING AND INSTALLING / REPLACING COMBUSTION AIR BLOWER (THERMO TOP S) |