engine BMW 3 SERIES 2005 E46 Model Yar Changes

Initial Print Date: 10/3/00Revision Date:10/24/00
Subject Page
20 pin Diagnostic Socket Deletion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Instrument Cluster SIA Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2001 E39 Update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Body work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Fog lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Park Distance Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Head and Tail Light Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
IHKR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
IHKA IV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Rear HPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Review Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table of Contents
2001 MODEL YEAR 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.
½
P
1
20406080100
120
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5
6
7
!ABS

 

 
 






miles
0
10
15 20 40
+
  


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

7
2001 model year changes
Engines
Two M54 engine variants will be added to the E39 for the 2001 M.Y. starting production
9/00. The M54 B30 and M54 B25. The M54 B30 engine will replace the M52 B28TU of
the 528i and become the 530i. The M54 B25 engine equipped 5 Series will create a new
model, the 525i, it will become the entry level 5 series.
The design objectives for the M54 engine were:
 Lower emissions
 Maintain fuel economy
 Increase power and performance.
The 540i/it will use the A5S 440Z automatic transmission with Steptronic as standard
equipment and continues to have the optional 6 speed manual. The 525i and 530i
models will use the A5S 390R (GM 5) with Steptronic as optional equipment until March of
2001 at which time the GM5 will be replaced by the A5S 325Z (5HP 19).
Please refer to the 2000 Systems Diagnosis course material ST 039 for information concerning the
M54 engine family.
M54 B25 M54 B30
HORSEPOWER 192@5900 rpm 225@6000rpm
TORQUE 245Nm@3500rpm 300Nm@3500rpm

16
2001 model year changes
The IHKR control module communicates with the DME via the K-Bus/KOMBI/CAN Bus
link to request permission for compressor activation. The control of the compressor
clutch is directly by the IHKA module via a final stage.
 
Rear Window Defroster:The rear window defroster is controlled via a request from
the button on the panel. After switching on for the first time, the rear window is heated
for 10 minutes. Output voltage to the window is provided by the K13 rear defogger
relay. After automatic switch off, if the button is pressed once again the control unit will
pro vide a clocked operation alternating at 40 seconds on and 80 seconds off. If the
vehicle voltage drops below 11.4V during this second heating operation the function is
stopped, however the LED on the button will not be extinguished. If voltage increases
past 12.2V for at least one second, clocked operation will resume. Clocked operation
continues until the button is pressed again or the ignition is cycled.
Washer Jet Heating:The IHKR provides operating current to the washer jet heaters
based on outside temperature. The washer jets are heated below an outside
temperature of 37
oF.
K-Bus Communication:The IHKR control unit is on the vehicle K-bus and receives
and sends information concerning:
 Engine temperature, RPM, KL61, KL50, compressor request, auxiliary fan request,
compressor load (DME)
 Outside temperature KL15 and road speed (KOMBI)
 Diagnosis and coding (DIS/MoDiC)
Ventilation Flap
Stratification flap
Heater Core
Defrost Flap
Evaporator
Outlet, rear footwellOutlet, Rear compartment
Blower
Left side of IHKR case

17
2001 model year changes
IHKA IV
The IHKA system is standard equipment on 530i, 540i/it and M5 models. It is available as
an option for the 525i/it. IHKA has been redesigned for the 2001 E39, it is identified as
IHKA IV. The carry over features from the previous version are:
 Integrated control panel/module.
 Separate temperature control for driver and passenger.
 Air distribution control through the use of 5 “smart” stepper motors and one fast acting
hard wired stepper motor.
 Automatic recirculation control (AUC).
 Recirculation control via MFL.
 “Rest” function for residual heat when engine is not running.
 Service station feature that closes the water valves when stopped to prevent hot coolant
flooding the heater core.
 A/C compressor clutch activation via a final stage control.
 Stratification flap control via a bowden cable.
Please refer to the Climate Control course material ST 054 for a complete functional description of
E39 IHKA
70 0 F 640 F
-+AUTO
A
AUTO
MAX

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