64 99... Fault 04 Circulation pump
WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.
Test precondition:
Overheating protection not active. Voltage supply at independent parking heater OK.
Instruction:
Switch on independent parking heater via MID or on-board monitor.
CIRCULATION PUMP FAULT DESCRIPTION
| Question | Answer | Measure |
|---|---|---|
| Is circulation pump running? | No | Fault 4.1 |
| Yes | The circulation pump is OK |