17
2001 model year changes
IHKA IV
The IHKA system is standard equipment on 530i, 540i/it and M5 models. It is available as
an option for the 525i/it. IHKA has been redesigned for the 2001 E39, it is identified as
IHKA IV. The carry over features from the previous version are:
Integrated control panel/module.
Separate temperature control for driver and passenger.
Air distribution control through the use of 5 “smart” stepper motors and one fast acting
hard wired stepper motor.
Automatic recirculation control (AUC).
Recirculation control via MFL.
“Rest” function for residual heat when engine is not running.
Service station feature that closes the water valves when stopped to prevent hot coolant
flooding the heater core.
A/C compressor clutch activation via a final stage control.
Stratification flap control via a bowden cable.
Please refer to the Climate Control course material ST 054 for a complete functional description of
E39 IHKA
70 0 F 640 F
-+AUTO
A
AUTO
MAX
