BMW X5 2002 E53 User Guide

11
Interior/Seats
Two interior seat options (comfort and sport) are available for the X5. The seats are mount-
ed high in the cabin for good visibility and offer 8-way power, memory adjustments with
lumber support. The seat/mirror memory control module and switch assembly is located on
the side of the driver’s seat.
52530000
52530011

12
Rear Seats
The rear seating area on the X5 offers 1472mm width and 977mm of head room for com-
fortable seating for the rear passengers. Rear cup holders are installed in the center con-
sole below the IHKA outlet grilles which incorporates a separate blower fan for the rear
seating area.
The rear seats have a 60/40 split with the fold down center arm rest on the left seat back.
The center arm rest also includes the optional folding ski bag.
52530015
40 Split
60 Split52530016
64530008

13
Rear Seat Backrest Adjustment
Electric rear seat backrest adjustment is
available on the X5 as optional equipment.
Each backrest can be adjusted individually
up to 20 degrees. the backrest adjustment
option consists of the following:
• Left/Right adjusting motors with gear
drive and seat back hooks - located
behind the seat backs on the shock
towers. The rear seat backs lock into
the “D” shaped hooks on the backrest
adjustment linkage.
• Left/Right adjusting switches - located
in the interior light housing in the head-
liner panel.
• Left/Right adjusting switches - located
in the rear on the left and right sides of
the “D” pillar behind the upper tailgate.
52530013
63530002
52530014

14
System Operation
The seat backs are adjusted from the two different locations as follows:
• The switches in the interior light housing receive operating power through the seat back
relay when the ignition is switched on KL 15. The GM controls the operation of the relay
and the switches provide the ground.
• The switches in the “D” pillar receive KL 30 and allow seat back adjustment whenever
the rear tailgate is opened to gain access to the switches.
• The adjustment motors receive power and ground directly from the switches.
MM
General ModuleBackrest RelayBackrest Adjustment
Switch LeftBackrest Adjustment
Switch Right
Backrest Adjustment
Switch LeftBackrest Adjustment
Switch Right KL30
Motor, Backrest Left Motor Backrest Right

Climate Control Systems (IHKR/IHKA)
Two climate control systems are offered on the X5, the manual IHKR system is standard
equipment on the 3 liter X5 and the IHKA system is available as an option. The IHKR is a
new system for US production and the IHKA is taken from the E39 vehicles.
Condenser/Receiver Dryer
The X5 incorporates a new design air conditioning condenser/receiver dryer for both the
manual (IHKR) and the automatic (IHKA) systems. The dryer cartridge and condenser are
one component with the dryer integrated on the left side. The dryer cartridge contains a
replaceable filter screen and dryer unit.
The condenser is partitioned which divides the condenser into cooling sections. The hot
refrigerant flows across the condenser and into the dryer through inlet holes at the lower
1/3 section of the cooling fins. After the refrigerant passes through the dryer it returns to
the evaporator through the outlet hole and bottom 1/3 section of the condenser.
Condenser Side View
Receiver Dryer
Filter
Screen
Bottom View
64530000
15

16
Climate Control System (IHKR)
The manual system is controlled through the use of bowden cables for air distribution and
electronic control for temperature regulation and blower speed. One stepper motor is used
for the fresh/recirculated air intake.
The IHKR incorporates the following features:
• Fresh air intake grilles integrated into the hood - the fresh air passes through the single
micro filter installed in the center of front bulkhead.
The air then passes through the air duct, which is bolted to the bulkhead, and enters the
heater - A/C unit through the non-return flaps.
41530004
64530002
Intake
Fresh Air

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
204060801001201400234
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