(E85) Z4 Heating / Air Conditioning System

(E85) Z4 Heating / Air Conditioning System

(E85) Z4 Heating / Air Conditioning System
Model: (E85) Z4
Production: Start of Production MY 2003

System Desciption Topics


^ List the visual differences that identify IHKA from IHKS.
^ Explain how are 3 sets of distribution flaps controlled by one stepper motor on the IHKS system.
^ Access the microfilter for service.
^ Diagnose a faulted interior temperature sensor blower (IHKA).
^ Describe what occurs with the A/C compressor when MAX AC is switched off (IHKA).
^ Understand how to deactivate Transportation Mode before vehicle delivery.

(E85) Z4 Heating / Air Conditioning System
New System Description
This module describes the heating and air conditioning systems of the Z4.A differentiation is made between (depending on how the vehicle is equipped):
^ Integrated heating and air conditioning control - INKS
^ Integrated automatic heating and climate control - IHKA
Compared to the predecessor (Z3), the optional IH KA including automatic recirculating air control AUC is a unique feature in the roadster.
In both variants, the control panel consists of three control zones each with a rotary knob.
These are elevated from the instrument panel like islands to underscore the sporty characteristics and enhance the high grade appearance of the roadster. The rotary knobs feature precision adjustment and rotary function lighting.
Various function buttons that differ depending on IH KS/IH KA are integrated in the center island.

Advantages at a glance:
^ Sporty and high grade control panel appearance.
^ The island design provides clearly arranged and easy to use controls.
^ Precision adjustment for air distribution, blower speed and temperature setting.
^ Common parts concept implemented to a large extent.
^ No water shut-off valve and auxiliary water pump due to airbased control.