BMW E39 2001changes

Table of Contents 2001 MODEL YEAR CHANGES Subject

Page

20 pin Dia Diagnos gnostic tic Socket Socket Dele Deletion tion.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Instrument Cluster SIA Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2001 E39 Update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Body work. work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Fog lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Park Park Distance Distance Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Head and Tail Light Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 IHKR IHKR.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 IHKA IHK A IIV V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Rear HPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Revi Re view ew Que Questio stions. ns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Initi nitial al Prin Printt Dat Date: e: 10/3/00 10/3/00

Revis evisio ion n Dat Date: e:10/24 10/24/00 /00

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 compartm com partment. ent. The 16 pin OBD IIII connector located inside the vehicle 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 TXD (D-b (D-bus). us). The TXD TXD line is connected connec ted to t o 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 brid ge that links KL 30 to TXD TXD and TX TXD II. 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 introduction of the DISplus. 2 2001 model year changes

Diagnostics via the OBD II Connector

DSC III kjhsdfkhsdflk hsdlkfjhlkjghkg lkdkfljdflkjdsfljdslfjlds kjflkjdflk ldsflsdfklhdsfh sdfhsdkhfkh sdf  kldjfkljdfkjdskfk jdskfjkljdfkldsfk kjsdfkljsdfkds fkjdsfkljsdfkjds ldjsfklkjsdfklds jfkdsjfkdsfkdfk lk

DIS BM W         S        I        D

     W      M      B

DIS/MoDiC CONNECTOR

OBD II CONNECTOR

16 9

8

7

-

+

KL 30

80

40 12 0

20

60

2

5

120

1

200

6

220

20

240

140

0

km/h

miles

50302015 503020 15 12

1

D      M      E     

4

1/min x1000

7

MPH

      S        U        B          K       /       I 

     E      M      D

120140 100 160 80 180

40

11

UNLEADED GASOLINE ONLY

3

100

60

4

KL 31

      I       I       D       X       T

      D       X       T

     )      M      P      R      (      D T

5

BRAKE ABS

IKE/KOMBI  A   G  S 

KL 15

DSC

3 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 SIA reset reset tool to ol is not possible. po ssible. The service service indicator may be reset reset using using the reset reset mode in the instrument cluster.

1

80 60

6

1

½

20

5

2

120

40

140

0

7 40

PRESS AND HOLD LEFT BUTTON. KEEP PRESSED FOR 5 SECONDS AFTER KEY IS SWITCHED ON. TAP BUTTON TO RESET DISPLA DI SPLAY Y.

123456

20

miles

DIGIT

RESET

2

4

3 100

1224

20 15

+72

READOUT

SIA:

0F

10

0

PRND S

P

!

432

-919

ABS

TURN THE KEY TO POSITION 1 (KL R)

L

Service interval reset: high cluster

Reset procedure for high high and low clusters clusters with SIA III using the Reset Mode: M ode:  Ign gniition tion key key mu must st be “off” “off” •

Press Press and hold the trip odometer reset reset button in in the instrument instrument cluster cluster (left left button), button), and and turn the ignition key to the first position.

•

Keep Keep the button pres presse sed d for approxi approximate mately ly 5 seconds seconds until until one of the foll following owing words 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 and resett resetting ing is possible. If “reset” “reset” is not shown, the minimum limit has not been reached and resetting is not possible. •

Press Press and hold hold the reset reset button agai again n until until the word “RESE “RESET” T” begins begins to flash flash..

4 2001 model year changes

•

While While the display display is is flashi flashing, ng, press press the left left button briefly briefly to reset reset the serv service ice interv interval al.. After the display has shown the new interval the following will appear: “END SIA”

The system can only be reset again after 10 liters (2.5gal) of fuel have been consumed.

1

2 80

40 12 0

11

20

UNLEADED GASOLINE ONLY

PRESS AND HOLD LEFT BUTTON

60

100

60

200

40

220

120140 100 160 80 180

240

20

3 2 120

4 5

1/min x1000

6

1

140

0

km/h

50 30 20 15

12

7

MPH

TURN KEY TO POSITION 1 (KL R)

M miles

ESET

SIA

OILSERVICE

15000 KEEP BUTTON PRESSED FOR 5 SECONDS AFTER KEY IS SWITCHED ON.

END

SIA

Miles

E46 service interval reset

TAP BUTTON TO RESET DISPLAY

Reset procedure for clusters with SIA IV using the Reset Mode. (possible from 9/99 for E46, MY2001 E52)

•

Ign gniition tion key key mu must st be “off” “off”

•

Pres Press s an and d hold the trip trip odometer odometer button in in the instr instrume ument nt cluster cluster (le (left ft button), button), and turn the ignition key to the first position.

•

Keep Keep the button pres presse sed d for approxi approximate mately ly 5 seconds seconds until until one of the foll following owing words words appear in the display: “OIL SERVICE, or “INSPECTION”, with “rESET”.

•

Rele Re lease ase the rese resett button butt on and and press press a and nd hold again again until “rESE “rESET” begins begins to flash flash..

•

While While the display display is is flashi flashing, ng, press press the left left button briefly briefly to reset reset the serv service ice interv interval al.. After the display has shown the new interval, the following will appear: “END SIA”

The system can only be reset again after 10 liters (2.5gal) of fuel have been consumed. 5 2001 model year changes

2001 E39 UPDATE Model: E39 (525i/iT, 530i, 540i/iT, M5) Production Date: From 9/00 For Model Year 2001 the E39 will receive it’s first cosmetic facelift since series launch in 1997. In addit addition ion to the visual visual changes, severa severall systems systems have been enhanced enhanced and updated. A new new model mod el has has also also been added, the t he 525i/it, 525i/it , making 6 variants variants of the E39 E39 possible.

6 2001 model year changes

Engines Two M54 engine variants will be added to the E39 for the 2001 M.Y. starting production 9/00. 9/ 00. The M54 B30 and M54 B25. The M54 B30 engine will replace the M52 B28TU of the 528i and become beco me the 530i. The M54 B25 B2 5 engine equipped 5 Series will create a new new model, the 525i, it will become the entry level 5 series. The design objectives for the M54 engine were: • • •

Lowe werr emis mission ons s Maiinta Ma ntain fue fuel econo conomy my Incr ncrease powe powerr and and pe perf rfor orma manc nce e.

The 540i/it will use the A5S 440Z automatic transmission with Steptronic as standard equipment and continues cont inues to have the optional opt ional 6 speed manual. 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 Diagnosis course material mat erial ST 039 for information information concerning the M54 engine family.

HORSEPOWER

M 54 B25 192@5900 rpm

M 54 B30 225@6000rpm

TORQUE

245Nm@3500rpm

300Nm@3500rpm

7 2001 model year changes

Body Work The sheet metal remains unchanged, however several touches have been made to freshen the appearance of the 5 Series. The front, rear and and side impact strips st rips have have been painted body bod y color. color. The 540i/it 540i/ it has a chrome insert along the upper edge of the impact strips.

The kidney grille inserts on all models have been widened to give the car’s “face” a more aggressive appearance.

8 2001 model year changes

Fog lights New circular fog lights with convex plastic lenses 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 200 2001 1 E39 E39 will w ill have have Front Front and Rear PDC available available as an optio op tion. n. The system operates op erates  just  just as the E38 and E53 with the t he same syste system. m. The vehi vehicle cle is fitted with a PD PDC C switch located on the SZM. Activation is automatic with w ith reverse reverse gear engagement, engagement, but may be deactivated with the switch. The switch switc h may also be used used to activate the system. system. Criteria for operation remain unchanged from previous systems.

9 2001 model year changes

Head and Tail Lights The head and tail lights of the 2001 E39 have received a new look, utilizing optical wave guide technology technolog y. The wave wave guides are an an innovation innovation that t hat are not only aesthetically aesthetically pleasing, but also enhance safety.

Head Lights The front headlights have been completely redesigned, however they fit into the existing body bod y without any sheet sheet metal changes. The high and and low beam b eam headlights headlights are free-fo free-form rm reflect reflectors ors and no longer use the glass glass lenses. lenses. The turn signal has been been given its its own ow n circular lens next to the low beam.

10 2001 model year changes

The parking light and side marker use the optical wave guide technology. technology. Clear Clear rings surround the high and low beam b eam reflectors. reflectors. The rings are illuminated illuminated by a light source module mod ule similar similar to the ones used in the Visual Visual Entry Aid system. Output voltage for the light source module comes com es from the parking lamp final stage of the LCM III. III. There There is one light source module located at the back of the head light housing between the high and low beam headlights. headlights. The side marker for US models mod els also has has an additional wave guide conductor for illumination.

Light source module

US version side marker reflector with wave guide illumination.

Third generation Xenon headlights manufactured by Hella are standard equipment on V-8 powere pow ered d cars and available available as an an option opt ion on the 6 cylinder cylinder models. All xenon equipp equipped ed vehicles vehicles also use LWR automatic headlight headlight adjustment adjustm ent to maintain m aintain the vertical adjustment of the t he headlights headlights at any vehicle vehicle load. ( Refer to the 1999 M odel Update traini tra ining ng for details of sys sys-tem operation)

11 2001 model year changes

Tail lights The rear light housings have also been modified for 2001. No body changes were necessary.

Four wave guides illuminated by 8 LEDs

The LED illuminated tail lights provide an exciting fresh look look to t o the part of a 5 Series Series most drivers on the road are familiar with. Each tail light housing contains 4 wave guide assemblies. assemblies. At either end of the wave guides guides is a printed circuit board with 4 LEDs. LEDs. The LEDs provide the illumination for the tail light only. only. US models mod els use an a add ddition itional al 4 LEDs LEDs in the corner of the housing as a side marker.

On Sport Wagon models, the tail light assembly is two tw o pieces. In this case there continue cont inue to be only two sets of LEDs; one supplying light for each each half half of the housing. US models mod els also have two LEDs for the side marker. The advantage to using LEDs is the longer life span as well as lower power consumption.

The function of the LCM III remains unchanged from the previous year with the exception that because b ecause of the LED LED illuminated illuminated tail lights, lights, there t here is no tail light monitoring function. funct ion. The LCM III III module has been upd updated ated for the new lighting lighting features features of the 2001 E39. E39. All replacement LCM modules will supercede to this version in the parts system and it can be used on earlier vehicles. 1. Turn Signal 1

2. Wave Wave Guid Guide e Tail Tail ligh lightt 3. Side M Ma arker ker

3

2

4. Brake ake lilight 4

5

5. Re Rev vers ersing Li Light ght 6. Rear Fog Fog lig light ht (Not (Not used used for US)

12 2001 model year changes

Sedan left tail light housing

6

E39 IHKR The 525i/it will be fitted with IHKR as standard equipment. IHKA will be availa available ble as an option on those vehicles by ordering the Convenience package: SA 466. IHKR is a semi-automatically regulated heating and air-c air-conditioning onditioning system. system. The components com ponents are similar to the IHKR system used in the X5 3.0i. The E39 IHKR is a single zone system that regulates the temperature of the cabin based on the occupants desired temperature, sele select cted ed by a temperature sett setting ing dial. dial. Blower control, air distribution settings and stratification flap are manual.

System Components The E39 IHKR consists of the following components: •

IHK HKR R control control un unit it with ope opera ratin ting g contro controls ls

•

IHKR IHKR integr integrate ated d heate heaterr and and air air conditioni conditioning ng case case

•

1 Hea Heater ter core core tempe tempera ratu ture re sens sensor or

•

Evapo pora rato torr tempe tempera ratu turre se sensor sor

•

Interi Interior or tempera temperature ture senso sensorr (loca (located ted in in driv driver ers s ffootwel ootwell) l)

•

Doub Do ublle cage cage blowe blowerr moto motorr and and fina finall stage stage

• • • •

1 Wate Waterr val valve ve (duty cycle cycle contro controlllled ed)) Auxiliary wa wate terr pu pump mp 1 Fr Fresh air/re r/re-cir -circ steppe stepperr motor motor Auxi uxilia liary fan fan (DM (DME E contr control ollled)

•

Refri efrige gera rant nt Press ressur ure e Sens Sensor or

•

Left Le ft and and rig right ht fre fresh sh air air micro micro-fi -filte lters rs 13 2001 model year changes

E39 IHKR I.P.O. K-BUS WASHER JET HEATER

KL31 KL30 +

-

KL15 BLOWER MOTOR OUTPUT STAGE STAGE

+

M

FAN SPEED

 A/C REQUEST

 AUXILIARY WATER PUMP RECIRCULATION

M

E39

REAR DEFROST

72 45

80

WATER VALVE

IHKR

 TEMPERATURE CONTROL FRESH AIR/RECIRC MOTOR

TEMP

EVAPORATOR  TEMPERATURE

REAR WINDOW DEFROST RELAY REFRIGERANT REFRIGERANT PRESSURE

KL 30

KL 15

HEATER CORE  TEMPERATURE

COMPRESSOR COMPRESSOR CONTROL INTERIOR TEMPERATURE (FOOTWELL)

DSCIII kjhsdfkhsdf hsdfkhsdf lkhsdlkfjhlkjghkg kjghkg kdkflj lkdkfljdflkjdsfljdsl dflkjdsfljdsl fjldskjfl dskjflkjdflk dsflsdfklhdsfhsdf ldsflsdfklhdsfhsdf hsdkhfkhsdf kldjfkl djfkl  jdfkjdskfkjdskfjkl  jdfkldsfk dsfk kjsdfklj sdfkljsdfkdsf kjdsfkl  jsdfkjds djsfkl ldjsfklkjsdfkldsjf kjsdfkldsjf kdsjfkdsfkdfklk

58G LCM

     E      M      D

14 2001 model year changes

COMPRESSOR SHUT OFF/ON SIGNAL KOREL

K-BUS

DI BM W        S        I        D

     W      M     B

S

IHKR control unit with operating controls The IHKR control cont rol unit unit is incorporated into tthe he control panel. panel. The control cont rol panel panel consists of three buttons and three rotary dials. 1. Temperature control potentiometer 2. Air distribution mechanical knob 3. Fan control potentiometer 1

2

3 cables Blue Blue - vent flaps Red - defrost flaps Green - footwell flaps

X18341 3 pin

3

4 5 6 4. Recirculatio Re circulation n 5. Air conditioning request 6. Rear window defroster

X611 12 pin

X610 26 pin

Functional Functional Description: •

Air distribution: is carried out using the mechanical rotary dial acting on three bowden bowd en cables. cables.

•

Blower adjustment: is carried out using the rotary dial potentiometer (22 steps). The control unit signals the final stage via a variable voltage signal.

•

Temperature control: The desired interior temperature is set with the rotary dial potentiometer pot entiometer on the control co ntrol panel. Temperature regulation regulation is based on the Y-fact Y-factor or.. The inputs used to determine the Y-factor are: • Positi Position on of the tempera temperature ture control potentiomete potentiometerr dial dial • He Hea ater ter cor core e tempe tempera ratu turre • Coo oollant temp tempe eratur ture • Exteri xterior or Tempera mperatur ture e • Inte nteri rior or Tempera mperatu turre Control of the interior temperature is carried out by the control unit cycling the water valve valve to regulate regulate the temperature of the heater heater core. During heater heater operation the auxiliary water pump will be switched on to increase coolant circulation through the heater core. The service service station feature is carried carried over to the t he E39 E39 IHKR.

•

Fresh air/recirculation: Recirculation is requested by an input to the control panel button but ton or the MFL. MFL. The control cont rol unit unit actuates the fresh fresh air/re-circ air/re-c irc stepper motor for control cont rol of the flap position. Ram effe effect ct air is compensated com pensated for. for.

•

Air conditionin c onditioning g : The The request request for air conditioning conditioning is made by means of a push button. butt on. 15 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 butt on on the panel. After switching on for the first time, the rear rear window is heated heated for 10 minutes. Output voltage to the window is provided by the K13 rear rear defogger relay relay. After automat automatic ic switch off, if the but button ton is pressed pressed once again again the control unit will provide pro vide a clocked operation alternating alternating at 40 second seconds s on and and 80 seconds off. If the vehicle voltage drops below 11.4V during this second heating operation the function is stopped, stop ped, howeve how everr the LED LED on the button will w ill not be extinguished. If v voltage oltage increases increases past 12.2V for at at least least one second, second, clocked c locked operation will rresume. esume. Clocked operation continues cont inues until the button is pressed again 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 jets are heated below an outside temperature of 37 F. o

•

K-Bus K- Bus Communication: Communication: The IHKR control unit is on the vehicle K-bus and receives and sends information concerning: • Engine temperature, temperature, RP RPM, M, KL61, KL50, KL50, compressor compressor request, request, auxi auxilia liary ry fan request, request, compressor load (DME) • Outside Outside tempera temperature ture KL15 KL15 and and road road speed speed (KO (KOMBI MBI)) • Diag Diagno nosi sis s an and d coding coding (DIS/MoD DIS/MoDiC iC))

Left side of IHKR case

Defrost Flap

Blower Ventilation Flap

Stratification flap

Heater Core

Evaporator Outlet, Rear compartment Outlet, rear footwell

16 2001 model year changes

IHKA IV The IHKA system is standard equipment on 530i, 540i/ it and M5 models. mod els. It is avai available lable as an option for the 525i/it. 525i/it . IHKA has been been redesigned redesigned for the 2001 E39, E39, it is identified identified as IHKA IV IV. The carry over features from the t he previous version are: •

Inte ntegra grated ted contr control pa pane nell/modul /module.

•

Separ Separate ate te temper mperatur ature e control control for driv driver er and and passe passenge ngerr.

•

Air Air distribu distribution tion control control throu through gh the use use of 5 “smart” stepper stepper motors and and one fast fast acting acting hard wired stepper motor.

•

Automa Automatic tic recir recircul culati ation on contro controll (AU (AUC) C)..

•

Recircu ecircula latio tion n control control via via MFL. MFL.

•

“Rest” “Rest” function function for resi residua duall heat heat when when engin engine e is is not runni running. ng.

•

Servi Service ce station station feature feature that closes closes the water val valve ves s when stopped to prevent prevent hot hot coolant flooding the heater core.

•

A/C compres compressor sor clutch activa activation tion via via a final final stage stage control control..

•

Strati Stratifi ficati cation on fla flap p control control via via a bowden bowden cable cable..

70 0 F

640 F

 AUTO  AUT O  A

 AUTO

MAX

-

+

Please refer to t o the Climate Control course course material mate rial ST 054 for a complete functional description description of E39 IHKA

17 2001 model year changes

E39 IHKA IV I.P.O. K-BUS

KL 31

KL 30

- Coolant temp - KL R - Outside Air Temp - Recirc from MFL - Vehicle speed - Diagnosis

KL 15

70 F 76 F

LEFT WATER  VALVE  VALVE

INDEPENDENT DRIVER & PASSENGER SIDE  TEMPERATURE  TEMPERATURE CONTROL

WASHER JET HEATING HEATING

MAX DEFROST

   0    2    1  4    9    3    8    1 1    6  4

 A/C COMPRESSOR

 AUC GAS SENSOR HEATER

+ BLOWER RELAY

RECIRCULATION - AUC

 A

RIGHT WATER  VALVE  VALVE

REAR DEFROST DEFROST VENT

     R      E      W      O       L      B

M

2-8 VOLT BLOWER MOTOR OUTPUT STAGE

SIGNAL

FACE VENT FOOTWELL VENT E39 IHKA IV

 AUTO

 AUTOMATIC  AUTOMATIC PROGRAM

MAX

MAX COOLING/ REST HEATING

+

-

FAN SPEED REQUEST

INTERIOR AIR TEMP

INT E  ER     R I  O  

R    A I  R 

PHOTO TRANSISTOR

EVAPORATOR  TEMPERATURE  TEMPERATURE HEATER CORE TEMPERATURE SENSORS

CONTROL PANEL/ MODULE

FRESH AIR FLAP STEPPER MOTOR M-BUS FIVE STEPPER MOTORS - FACE VENT FLAP - DEFROST - FOOTWELL - FRESH AIR/RECIRCULATION AIR/RECIRCULATION - RAM AIR FLAP

COMPRESSOR CONTROL

 AUXILIARY WATER PUMP

M

 AUC OXIDIZABLE GAS SENSOR    0    2    1  4    9    3    8    1   4 1    6

REAR WINDOW DE-FOGGER RELAY

+

+

SOLAR SENSORS DSC III kj kjhsdfkhsdfl hsdfkhsdflkhsdlkf  jhlkjghkg lkdkfljdflkj dflkjdsflj dsfljdslfj dslfjldskjfl ldskjflk kjdfl jdflk k ldsflsdfkl sdfklh hdsfhsdfhsdkhfk dsfhsdfhsdkhfk hsdf kl kldj djfkl fkl jdfkj  jdf kjdskfkjdskfjklj dskfkjdskfjkljdfkldsfk kj kjsdfkl sdfkl jsdfkdsfkjdsfk ljsdf kj kjds ds ldjsfklk kjsdfkl jsdfkldsjfkdsjfkdsfk dsjfkdsjfkdsfk dfklk

     E      M      D

18 2001 model year changes

COMPRESSOR SHUT OFF/ON SIGNAL (KO REL)

K-BUS

DIS BM W        S        I        D

     W      M     B

DIAGNOSIS AND CODING

Changes made to the E39 IHKA •

New Ne w Contr Control ol Unit nit (si (sinc nce e 9/00) 9/00)..

•

Additi Addition on of of so sola larr sen senso sorr (si (since nce 9/00). 9/00).

•

New Ne w IHKA integr integrate ated d hea heater ter and and air air conditioni conditioning ng case case ((si since nce 3/00). 3/00).

IHKA IV Control Unit The The “REST “REST”” button on o n the control unit unit has been replaced with a “MAX “M AX”” button. butt on. Two different different functions are carried out by pushing the MAX button: • •

Maximu Max mum m coo coolling func functi tion on Residu sidua al he hea at fu functi nction on

Determination of which function will be enabled is based on switching criteria.

A/C MAX function (This (This feature was introduced introduced in the E38 since 9/ 99)

Maximum cooling performance is automatically automatic ally activated by pressing pressing the MAX butt button. on. An LED on the button illuminates to indicate that the function is active. Criteria for operation: Terminal 15 “on” , MAX button pressed and outside temperature above 60 o F. The following settings are adjusted or activated: • Temperature emperature control is is cancele canceled d and and the temperature temperature display display indicates indicates 60 o F. • Both Both wate waterr va valve lves ar are cl close osed. • The left left and and right right Y-factors -factors are are set set to -27.5%. -27.5%. • The compre compressor ssor is switche switched d on (LE (LED D turns turns on in in the A/C switch) switch). • The blower blower settin setting g iis s set set to maxi maximum mum.. • Re Recir circula culation tion is is activate activated d (LE (LED turns on in in the re-circ re-circ switch). switch). • Air Air distri distributi bution on is is set set to center center ven vents ts only only.. Operation of the max defrost is overridden overridden by selecting MAX. MAX. The operation of the t he rear rear window defogger is not affected.

19 2001 model year changes

REST REST Functi Function on The The REST REST function continues continues to operate as as usual usual except except that the MAX button has taken taken the place of the RE REST ST but button. ton. Activation criteria continues cont inues to be: • Ign gnit itiion “OF “OFF” or in K KL L R. R. • “MA “MAX” butt button on pre pressed. • Outsi utside de tempe tempera ratur ture e be bellow 60 60 o F. • Co Cool ola ant tempe tempera ratu ture re above bove 80 o C. • Batte Battery ry volta oltage ge a abov bove e 11 11.4V .4V. The RE REST ST feature operates operat es as previously. previously. Diagnostics The IHKA IV diagnosis has been been upgraded to t o the E46 style diagnostic diagnostic program.

Solar Sensor The IHKA IV integrates the solar sensor sensor into the t he calculation used to automatically regulate the interior vehicle vehicle temperature. The sensor is located in the right side defrost outlet.

Solar Sensor

In the case of a very sunny day, the interior warms faster than the control unit can compensate for. for. Similar Similar is is true if the weather suddenly becomes overcast. The input of the solar sensor in the E39 can affect the operation of: • Blowe werr setti tting • Air distr distriibu buti tion on to cent cente er ve vent Because the E39 IHKA IV is a dual zone system. the solar sensor housing contains two photo-resistors that measure solar radiation on the left and right halves of the interior. Two photo-resistors inside of housing

20 2001 model year changes

(Please (Please refer to the Solar Sensor module module in the 2000 Systems Diagnosis training course ST 039 for a complete description of the solar sensor operation and diagnosis)

IHKA integrated heater and air conditioning case The E39 IHKA case has has been redesigned redesigned since since 3/00. 3/ 00. The E39 and 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 recirculation inlets. inlets. Ram air air is controlle cont rolled d by a separate separate flap. flap. What makes it possible to use a single flap for fresh air/re-circ is the semi-circular door; as one inlet is covered another is opened. Please refer to t o the Climate Control course course material mate rial ST 054 for a complete functional description description of ram air pressure compensation.

Right Side of IHKA IV Case

3

5

1

4

2

1. Stepper motor for footwell 2. Stepper motor for rear compartment, stratification 3. Fresh air/ recirculation recirculation flap 4. Output stage for blower motor 5. Stepper motor for ram air flap 6. Ram air flap

6

Stepper motors for the fresh air/recirculation, defrost and ventilation flaps are located on the left side of the housing

Ram air and fresh air/re-circ flaps as seen from the engine side of the bulkhead

21 2001 model year changes

E39 Rear Head Protection System (HPS) For 2001, rear head protection airbags (HPS) will be available for sedans ordered with rear side airbags. The airbags are a cushion (not an ITS) that is nott be deployed from the C-pilla C-p illarr. The HPS will no de-activated along with the side airbags from the factory since there is no danger to small children sitting out of position. A vehicle with rear HPS can be identified by observing “HPS” embossed in the C-pillar cover. Rear airbags with HPS will be standard equipment on the 2001 E39 M5.

Review Revi ew Questions Questions 1. What What addition was made to the 16 pin OBD OBD connector connector that made diagnosis diagnosis possible with the DIS/MoDiC?

2. Describe Describe the procedure procedure to reset reset the t he Serv Service ice Interv Interval al Indicator Indicator from the instrumen instrumentt cluster.

3. How does the E39 E39 IHKR IHKR system system maintain maintain the desired desired cabin temperatur temperature? e?

4. Was the “REST “REST”” fea feature ture deleted deleted from the IHKA IHKA IV IV system? system?

5. What What was the addition addition made to the rea rearr airbag airbag system system of the 2001 E39? E39?

22 2001 model year changes