E53 BMW X5 2004 E53 Model Yar Changes

2
2001 model year changes
20 PIN DIAGNOSTIC SOCKET DELETION
Model: E39,E46,E52,E53
Production Date: E46 from 6/00
E39,E52,E53 from 9/00
For model year 2001 the E39, E46 and E53 will eliminate the 20 pin diagnostic connector
from the engine compartment. The 16 pin OBD II connector located inside the vehicle will
be the only diagnosis port.
The E38 and Z3 will continue to use the 20 pin connector.
The 16 pin OBD II connector has been in all
BMWs since 1996 to comply with OBD II
regulations requiring a standardized diagnostic
port.
Previously before 2001, only emissions relevant
data could be extracted from the OBD II
connector because it did not provide access to
TXD (D-bus). The TXD line is connected to pin
8 of the OBD II connector on vehicles without
the 20 pin diagnostic connector.
The cap to the OBD II connector contains a
bridge that links KL 30 to TXD and TXD II. This
is to protect the diagnostic circuit integrity and
prevent erroneous faults.
The OBD II connector is located in the drivers
footwell to the left of the steering column of E39,
E46 and E53 vehicles.
Special tool 61 4 300 is used to connect to the
20 pin diagnostic lead of the DIS until the intro-
duction of the DISplus.

4
2001 model year changes
INSTRUMENT CLUSTER SIA RESET
Model: E38,E39,E46,E52,E53
Production Date: E46 from 9/99
E38,E39,E53 from 9/00
On 2001 vehicles without the diagnostic connector in the engine compartment, the use of
the SIA reset tool is not possible. The service indicator may be reset using the reset mode
in the instrument cluster.
Reset procedure for high and low clusters with SIA III using the Reset Mode:
• Ignition key must be “off”
 Press and hold the trip odometer reset button in the instrument cluster (left button), and
turn the ignition key to the first position.
 Keep the button pressed for approximately 5 seconds until one of the following words
appear in the display: “OIL SERVICE, or “INSPECTION”, with “RESET”.
The service due is shown with “reset” if the coded minimum consumption limit has been
reached and resetting is possible. If “reset” is not shown, the minimum limit has not been
reached and resetting is not possible.
 Press and hold the reset button again until the word “RESET” begins to flash.
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miles
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10
15 20 40
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TURN THE KEY TO
POSITION 1 (KL R)PRESS AND HOLD
LEFT BUTTON.
KEEP PRESSED FOR
5 SECONDS AFTER
KEY IS SWITCHED
ON.
TAP BUTTON TO
RESET DISPLAY.
12
Service interval reset: high cluster

9
2001 model year changes
Fog lights
New circular fog lights with convex plastic lens-
es are tucked neatly into the corners of the new
front air dam. The new lights use an H8 12V
35 W halogen bulb.
Park Distance Control
The 2001 E39 will have Front and Rear PDC available as an option. The system operates
just as the E38 and E53 with the same system. The vehicle is fitted with a PDC switch
located on the SZM. Activation is automatic with reverse gear engagement, but may be
deactivated with the switch. The switch may also be used to activate the system. Criteria
for operation remain unchanged from previous systems.

21
2001 model year changes
IHKA integrated heater and air conditioning case
The E39 IHKA case has been redesigned since 3/00. The E39 and E53 both share the
same case design.
The difference from the previous case is that a single flap (left and right), controls both the
fresh air and recirculation inlets. Ram air is controlled by a separate flap. What makes it
possible to use a single flap for fresh air/re-circ is the semi-circular door; as one inlet is cov-
ered another is opened.
Please refer to the Climate Control course material ST 054 for a complete functional description of
ram air pressure compensation.
1. Stepper motor for footwell
2. Stepper motor for rear compartment, stratification
3. Fresh air/recirculation flap
4. Output stage for blower motor
5. Stepper motor for ram air flap
6. Ram air flap
Stepper motors for the fresh air/recirculation,
defrost and ventilation flaps are located on the
left side of the housing
3
6
4
2
15
Right Side of IHKA IV Case
Ram air and fresh air/re-circ flaps as seen from the engine side of the bulkhead