BMW IHKA Heating and Air Con. System Technical Manual / Trouble Shooting [PDF] [E65/66, E53 X5, E63/64, E60]

Detailed 55-page guide on the operation and design of the IHKA climate-control / heating / air-conditioning system that started in the E65 7-Series and made it on to succeeding models such as the E60 5-Ser, E63 6-Ser and E53 X5. The latter of which I obtained the guide for to help in diagnosing problems with a noise secondary water-pump.

LINK: https://drive.google.com/file/d/1KBG3_annWcqTekn5NyhKVFqcXzCq2P_X/view?usp=sharing

Contents:

IHKA Automatic Heating and Air Conditioning System
Objectives of the Module . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .2 
Purpose of the System . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 3 

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Air Conditioning System
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..11 
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Heating System
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

IHKA Heater and Air Conditioner Housing
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  .19

Control Panel/Control Module
Detailed Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Temperature and Air Flow Control
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 27

Air Distribution
Principle of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . .35

Stationary Functions
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 45

Non-Air Conditioning Functions
Rear Roller Blind Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . .48

Coding
Key Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 
Vehicle Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

ReviewQuestions . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .55

Objectives of The Module
After Completing this module, you will be able to:
• List the gasses detected by the AUC-2 sensor.
• Explain how the refrigerant compressor output is varied.
• List the refrigerant compressor “Run In” procedure.
• Locate the blower motor and blower control module.
• Describe the control panel functions.
• Explain the “Y” factor.
• Explain how the temperature is increased during air conditioning operation. • List the functions that apply to heater operation when the coolant is cold. • Demonstrate Manual Air Distribution individual adjustments.