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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 539 (HEATING AND AIR CONDITIONING - REPAIR)TROUBLESHOOTING64 99... FAULT 07 OVERHEATING PROTECTION
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans

64 99... Fault 07 Overheating protection

2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 64 99... Fault 07 Overheating protection
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.

Test precondition: 

Independent parking heater not in heating mode or after-running mode.

Wires from heater control unit to independent parking heater control unit O.K.

Instruction: 

Switch on independent parking heater via MID or on-board monitor.

OVERHEATING PROTECTION FAULT DESCRIPTION

Question   Measure
Is battery voltage applied at connector strip plug connector X01017 between Pin 9 and vehicle ground? No Wire from heater control unit to independent parking heater or heating control unit defective)
Yes    
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  (and layout of water hoses (kink))
Yes    
Overheating protection is not active. Replace combustion air blower, refer to 64 12 530 REMOVING AND INSTALLING / REPLACING COMBUSTION AIR BLOWER (THERMO TOP S)     
RENDER: 1.0x

NO RELATED

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