2004 BMW X5 Workshop Manual

17
IHKR Control Unit
• Integrated control module with oper-
ating panel.
• IHKR heater/air conditioner unit with
- 1 heat exchanger temperature sensor
- 1 evaporator temperature sensor
- 1 footwell temperature sensor
- Blower motor
- 1 stepper motor (high speed fresh/rcirc air)
45
80 72
TEMP
0
64530003

18
IHKR Operation
IHKR system operation is as follows:
• Temperature Control - The desired interior temperature is set with the rotary knob on the
control panel. Control of the interior temperature is carried out electronically by the con-
trol module’s cycling of the water valve to regulate coolant flow through the heat
exchanger.
• Air Distribution - Air distribution is set mechanically through the use of gear linkages and
bowden cables. The air can be set for:
- Footwell or blended between footwell/face vent or footwell and defrost
- Defrost or blended between footwell/defrost or defrost/face vent
- Face vent or blended between face vent/footwell or face vent/defrost
• Blower Control - Blower fan speed is controlled through a final stage with infinitely vari-
able speed control.
The push buttons on the control panel are used to:
• Switch between fresh air and recirculating air inlet modes
• Request for A/C activation
• Activation of the rear window defogger
45
80 72
TEMP
0
64530008

19
45
80 72
TE MP
M
+
+
+
½
P
1
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5
6
7!ABS
    
  









 
mi le s0
10 15 20 40+
DME
M
KL31
KL30
KL15
Fan Speed
Request
A/C Compressor
Recirculation
Rear Defrost
Temperature
Control
Evaporator
Temperature SensorWasher Jet Heater
Blower Relay
Blower
Blower Motor Ouput Stage
M
Rear Window Defoger Relay
Aux. Fan Speed Relay Control
Water Valve
Fresh Air Flap Motor
IKE
DME
Compressor Control
Aux. Fan
IHKR
K-Bus
Refrigerant Pressure Sensor
C
A
N
DIS & Modic
IHKR IPO
64530006.cdr

20
Climate Control System (IHKA)
The IHKA is standard equipment on the X5 with the M62 engine and optional equipment
on the M54 version. The IHKA system is taken from the E39 sedan and includes all func-
tions and features of the IHKA currently installed in the E39.
Features of the IHKA system include:
• Integrated control panel/module.
• Separate temperature control for the driver and front passenger.
• Air flap control through the use of bussed stepper motors.
• Automatic Recirculation Control (AUC).
• Recirculation air flap control from the MFL.
• “REST” function for residual heat when vehicle is stopped.
• Service station feature that closes the water valves when stopped to prevent hot water
circulating into the heater cores.
• A/C compressor clutch activation through a final stage control.
• Center face vent stratification control through a bowden cable.
• Separate blower motor for rear passenger compartment
The rear blower motor is located below the center storage box behind the center air outlet
grilles. The blower speed control is mounted in the panel below the outlets. Cool or strati-
fied air is available at the center outlets.
64530004

21
IHKA Air Flow
The micro filter for the IHKA system is installed in the engine compartment in the center of
the fire wall.
64530005
Warm Air Flow
Stratified Air Flow
64530006

22
Cargo Area
The cargo area of the X5 offers 450 liters/15.9 cuft of space and has a load capacity of 440
pounds. The retractable, removable cargo cover is standard equipment. Storage com-
partments are located on the left and right sides in the rear.
The left side storage compartment contains the NAV
computer when installed and the telephone transceiv-
er and CD changer.
The right side storage compartment
contains the rear power distribution
fuse box as well as the sub-woofer
for the stereo system. Mounted in
front of the right side storage com-
partment are two 12 volt accessory
power sockets.
52530015
84530000
61530011

23
Cargo Area
The sliding load floor is available as an option on the
X5. It is mounted through two sliding bushing on two
steel rails
The load floor is held in position by the
locking bowden cable mechanism that
latches when closed to prevent the
floor for sliding while the vehicle is
moving. The load floor incorporates a
shear point that will cause the floor to
collapse upward in a rear collision.
51530000
Bowden
Cables
51520002

24
Cargo Area
The full size spare tire is mounted
below the load floor with the LVA air
supply system for the air springs
located beneath the spare.
The battery is mounted below the LVA
in a molded plastic battery box, along
with the EHC control module and the
PDC control module. If the optional
trailer towing package is installed, the
trailer module is also installed in the
module carrier.
61530011
36530001