64 99... Fault 07 Overheating protection
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:
Independent parking heater not in heating mode or after-running mode.
Wires from heater control unit to independent parking heater control unit OK.
Instruction:
Switch on independent parking heater via MID or on-board monitor.
OVERHEATING PROTECTION FAULT DESCRIPTION
| Question | Answer | Measure |
|---|---|---|
| Is battery voltage applied at connector strip plug connector X01017 between Pin 9 and vehicle ground? | No | Refer to appropriate Diagnosis Program. (Wire from heater control unit to independent parking heater or heating control unit defective) |
| Yes | Overheating protection is not active. | |
| Is battery voltage applied at connector strip plug connector X01017 between Pin 7 and vehicle ground? | No | Overheating protection is active. In this case, check: Bleeding coolant system, refer to 64 12... FLUSHING COOLING SYSTEM WHEN REPLACING LATENT HEAT ACCUMULATOR DUE TO SALT LEAKS temperature sensor, refer to FAULT 05 TEMPERATURE SENSOR circulation pump, refer to FAULT 04 CIRCULATION PUMP (and layout of water hoses (kink)) |
| Yes | Replace combustion air blower, refer to 64 12 530 REMOVING AND INSTALLING / REPLACING COMBUSTION AIR BLOWER (THERMO TOP S) |