Table of Contents 2001 MODEL YEAR CHANGES 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 Initial Print Date: 10/3/00 Revision Date: 10/24/00 20 PIN DIAGNOSTIC SOCKET DELETION Model: E39,E46,E52,E53 Production Date: E46 from 6/00 E39,E 52,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 DIS plus. 2 2001 model year changes Diagnostics via the OBD II Connector DIS/MoDiC CONNECTOR OBD CONNECTOR 16 9 8 CL CC tXXXXXJ KL 30 LU Q X CO D CD ■ * IKE/KOMBI 7 D X o o 4 KL 31 DSC > O CO 1 KL 15 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 reset tool is not possible. The service indicator may be reset using the reset mode in the instrument cluster. PRESS AND HOLD LEFT BUTTON. KEEP PRESSED FOR 5 SECONDS AFTER KEY IS SWITCHED ON. TURN THE KEY TO POSITION 1 (KL R) Service interval reset: high cluster TAP BUTTON TO RESET DISPLAY. 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. 4 2001 model year changes While the display is flashing, press the left button briefly to reset the service interval. Afterthe 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. * A KEEP BUTTON PRESSED FOR 5 SECONDS AFTER KEY IS SWITCHED ON. 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) Ignition key must be "off" Press and hold the trip odometer 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". Release the reset button and press and hold again until "rESET" begins to flash. While the display is flashing, press the left button briefly to reset the service interval. Afterthe 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, 5301, 5401/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 addition to the visual changes, several systems have been enhanced and updat¬ ed. A new model has also been added, the 525i/it, making 6 variants of the 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. 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 M aintain 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 (G M 5) with Steptronic as optional equipment until M arch of 2001 at which time the GM5 will be replaced by the A5S 325Z (5HP 19). Please refer tx> the 2000 Systems Diagnosis course material ST 039 for information concerning the M54 engine family. HORSEPOWER TORQUE M54 B25 192@5900 rpm 245N m@3500rpm M54 B30 225@6000rpm 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 side impact strips have been painted body color, chrome insert along the upper edge of the impact strips. The 540i/it has a ^ 3 ji ji The k aagre /, □Fj WG 3936 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. 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. The wave guides are an innovation that are not only aesthetically pleasing, but also enhance safety. Head Lights The front headlights have been completely redesigned, however they fit into the existing body without any sheet metal changes. The high and low beam headlights are free-form reflectors and no longer use the glass lenses. The turn signal has been given its own circular lens next to the low beam. 10 2001 model year changes The parking light and side marker use the optical wave guide technology. Clear rings surround the high and low beam reflectors. The rings are illuminated by a light source module similarto the ones used in the Visual Entry Aid system. Output voltage forthe light source module comes from the parking lamp final stage of the LCM III. There is one light source module located at the back of the head light housing between the high and low beam headlights. The side marker for US models also has an additional wave guide con¬ ductor for illumination. US version side marker reflector with wave guide illumination. Third generation Xenon headlights manufactured by Hella are standard equipment on V-8 powered cars and available as an option on the 6 cylinder models. All xenon equipped vehicles also use LWR automatic headlight adjustment to maintain the vertical adjustment ofthe headlights at any vehicle load. (Refertothe 1999 Model Update training for details of sys¬ tem operation) 11 2001 model year changes Tail lights The rear light housings have also been modi¬ fied for 2001. No body changes were neces¬ sary. The LED illuminated tail lights provide an excit¬ ing fresh look to the part of a 5 Series most dri¬ vers on the road are familiar with. Each tail light housing contains 4 wave guide assemblies. At either end of the wave guides is a printed circuit board with 4 LEDs. The LEDs provide the illumination for the tail light only. US models use an additional 4 LEDs in the corner of the housing as a side marker. On Sport Wagon models, the tail light assem¬ bly is two pieces. In this case there continue to be only two sets of LEDs; one supplying light for each half of the housing. US models 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 LC M III remains unchanged from the previous year with the exception that because of the LED illuminated tail lights, there is no tail light monitoring function. The LCM III module has been updated for the new lighting features of the 2001 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 2. Wave Guide Tail light 3. Side Marker 4. Brake light 5. Reversing Light 6. Rear Fog light (Not used for US) 12 2001 model year changes Sedan left tail light housing E39 IHKR The 525i/it will be fitted with IHKR as standard equipment. IHKA will be available as an option on those vehicles by ordering the Convenience package: SA 466. IHKR is a semi-automatically regulated heating and air-conditioning system. The components 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, selected by a temperature setting dial. Blowercon- trol, air distribution settings and stratification flap are manual. System Components The E39 IHKR consists of the following components: IH KR control unit with operating controls IHKR integrated heater and air conditioning case 1 Heater core temperature sensor Evaporator temperature sensor Interior temperature sensor (located in drivers footwell) Double cage blower motor and final stage 1 Water valve (duty cycle controlled) Auxiliary water pump 1 Fresh air/re-circ stepper motor Auxiliary fan (DME controlled) Refrigerant Pressure Sensor Left and right fresh air micro-filters 13 2001 model year changes E39 IHKR I.P.O K-BUS KL31 1^ T*~ra-Ei — + I* -» rimu KL15 r^r >-* FAN SPEED A/C REQUEST RECIRCULATION REAR DEFROST TEMPERATURE CONTROL EVAPORATOR TEMPERATURE A REFRIGERANT PRESSURE fs-► HEATER CORE TEMPERATURE 8 -► o INTERIOR TEMPERATURE (FOOTWELL) 58G LCM I COMPRESSOR SHUT OFF/ON SIGNAL KOREL WASHER JET HEATER 14 2001 model year changes IHKR control unit with operating controls The IHKR control unit is incorporated into the control panel. The control panel consists of three buttons and three rotary dials. 1. Temperature control potentiometer 2. Air distribution mechanical knob 3. Fan control potentiometer 4. Recirculation 5. Air conditioning request 6. Rear window defroster 3 cables Blue - vent flaps Red - defrost flaps firvpn - fnntwoll flanc X18341 3 pin X611 X610 12 pin 26 pin Functional Description: Air distribution: is carried out using the mechanical rotary dial acting on three bowden 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 on the control panel. Temperature regulation is based on the Y-factor. The inputs used to determine the Y-factor are: Position of the temperature control potentiometer dial Heater core temperature Coolant temperature Exterior Temperature Interior Temperature Control of the interior temperature is carried out by the control unit cycling the water valve to regulate the temperature of the heater core. During heater operation the auxiliary water pump will be switched on to increase coolant circulation through the heater core. The service station feature is carried over to the E39 IHKR. Fresh air/recirculation: Recirculation is requested by an input to the control panel button or the M FL. The control unit actuates the fresh air/re-circ stepper motor for control of the flap position. Ram effect air is compensated for. Air conditioning: The request for air conditioning is made by means of a push button. 15 2001 model year changes The IHKR control module communicates with the DME via the K-Bus/KOM BI/CAN Bus link to request permission for compressor activation. The control of the compressor clutch is directly by the IH KA 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 wil provide 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 J et 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° F. K-Bus Communication: The IH KR control unit is on the vehicle K-bus and receives and sends information concerning: Engine temperature, RP M, KL61, KL50, compressor request, auxiliary fan request, compressor load (DME) Outside temperature KL15 and road speed (KOMBl) Diagnosis and coding (DIS/MoDiC) Left side of IHKR case Defrost Flap Blower Ventilation Flap Stratification flap Heater Core Evaporator Outlet, Rear compartment ■ ^ .jmmk k \\ \\i Ss / e -—^ % 16 2001 model year changes Outlet, rearfootwell IHKA IV The IH KA system is standard equipment on 530i, 540i/it and M 5 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 M FL. "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 C limate Control course material ST 054 for a complete functional description of E39 IHKA 17 2001 model year changes E39 IHKA IVI.P.O KL 31 KL 30 KL 15 ■■■■■ ■■■ • ■■■■■ ■■ • INDEPENDENT DRIVER & PASSENGER SIDE TEMPERATURE CONTROL MAX DEFROST A/C COMPRESSOR RECIRCULATION - AUC GO 1 REAR DEFROST DEFROST VENT FACE VENT FOOTWELL VENT AUTO AUTOMATIC PROGRAM MAX COOLING/ REST HEATING FAN SPEED REQUEST INTERIOR AIR TEMP PHOTO TRANSISTOR o- EVAPORATOR TEMPERATURE HEATER CORE TEMPERATURE SENSORS AUC OXIDIZABLE GAS SENSOR SOLAR SENSORS COMPRESSOR SHUT OFF/ON SIGNAL (KO REL) E39 IHKA IV CONTROL PANEL/ MODULE K-BUS Coolant temp - KL R Outside Air Temp - Recirc from MFL Vehicle speed - Diagnosis LEFT WATER VALVE RIGHT WATER VALVE WASHER JET HEATING AUC GAS SENSOR HEATER BLOWER RELAY f-WWSrl i-AAMr-r BLOWER MOTOR OUTPUT STAGE FRESH AIR FLAP STEPPER MOTOR M-BUS FIVE STEPPER MOTORS - FACE VENT FLAP - DEFROST - FOOTWELL - FRESH AIR/RECIRCULATION - RAM AIR FLAP COMPRESSOR CONTROL AUXILIARY WATER PUMP REAR WINDOW DE-FOGGEft RELAY + + K-BUS DIAGNOSIS AND CODING 18 2001 model year changes BLOWER Changes made to the E39 IHKA New Control Unit (since 9/00). Addition of solar sensor (since 9/00). New IHKA integrated heater and air conditioning case (since 3/00). IHKA IV Control Unit The "REST" button on the control unit has been replaced with a "MAX" button. Two different functions are carried out by pushing the MAX button: Maximum cooling function Residual heat function Determination of which function w based on switching criteria. be enabled is A/C MAX function (This feature was introduced in the E38 since 9/99) Maximum cooling performance is automatically activated by pressing the MAX button. 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° F. The following settings are adjusted or activated: Temperature control is canceled and the temperature display indicates 60° F. Both water valves are closed. The left and right Y-factors are set to -27.5%. The compressor is switched on (LED turns on in the A/C switch). The blower setting is set to maximum. Recirculation is activated (LED turns on in the re-circ switch). Air distribution is set to center vents only. Operation of the max defrost is overridden by selecting MAX. The operation of the rear win¬ dow defogger is not affected. 19 2001 model year changes REST Function The REST function continues to operate as usual exceptthatthe MAX button has taken the place of the REST button. Activation criteria continues to be: Ignition "OFF” or in KL R. "MAX" button pressed. Outside temperature below 60° F. Coolant temperature above 80°C. Batten/ voltage above 11.4V. The REST feature operates as previously. Diagnostics The IHKA IV diagnosis has been upgraded to the E46 style diagnostic program. Solar Sensor The IH KA IV integrates the solar sensor into the calculation used to automatically regulate the interior vehicle temperature. The sensor is located in the right side defrost outlet. In the case of a very sunny day, the interior warms faster than the control unit can compen¬ sate for. Similar is true if the weather suddenly becomes overcast. The input of the solar sensor in the E39 can affect the operation of: Blower setting Air distribution to center vent Because the E39 IH KA 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. (Please refer to the Solar Sensor module in the 2000 Systems Diagnosis training course ST 039 for a com¬ plete description of the solar sensor operation and diagnosis) Two photo-resistors inside of housing 20 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 forfresh 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 Right Side of IHKA IV Case 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 deployed from the C-pillar. The HPS will not be 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 M 5. Review Questions 1. What addition was made to the 16 pin OBD connector that made diagnosis possible with the DIS/MoDiC?_ 2. Describe the procedure to reset the Service Interval Indicator from the instrument cluster._ 3. How does the E39 IHKR system maintain the desired cabin temperature 4 5 * 7 4. Was the "REST" feature deleted from the IHKA IV system 7 5. What was the addition made to the rear airbag system of the 2001 E39 7 22 2001 model year changes