Table of Contents E85 Driver Information Subject Page Instrument Cluster.4 System overview.4 Instrument-cluster plug connection.5 New system features/modifications .5 System Components.6 Display areas .6 Instrument-cluster lighting.6 Instrument Cluster Power Supply.7 Undervoltage detection.7 Coolant temperature gauge .7 Fuel gauge .7 Indicator Lamps .7 LC Display .12 Program and Gear Display.12 Acoustic generators .12 Seat Belt Reminder.13 Setting Buttons .13 System functions.13 Bus network.13 Instrument cluster as gateway .14 On-board computer .14 On-board computer display in navigation-system on-board monitor . .14 Redundant data storage (RDA).15 Notes for Service.15 Test functions.15 Test function 19 .15 Unlocking test functions.16 Locking test functions.16 Terminating test functions.16 Overview of test functions.16 Visual system test.17 Initial Print Date: 08/02 Revision Date: Diagnosis 17 Car & key memory.17 SIA IV service interval indicator.18 Review Questions .19 2 Driver Information Model: E85 Production: Start of Production MY 2003 Objectives: After completion of this module you should be able to: • Explain the inputs into the Instrument Cluster. • Identify the Indicator Lights and Warning Symbols in the Cluster. • Perform the Lock/Unlock and Self Test of the Cluster. • Change Car & Key Memory Setting in the Cluster. 3 Driver Information Instrument Cluster The instrument cluster in the Z4 has a sporty appearance in line with a roadster. The instru¬ ment cluster is very compact. The needle instruments are integrated in 2 housing attach¬ ments. The two needle instruments for the speedometer and the tachometer are thus the predominant visual features. The needle instruments for the fuel gauge and the coolant temperature gauge are integrat¬ ed in the tachometer. The speedometer incorporates an LC display, which shows e.g. the total mileage (odometer), the trip distance (trip odometer), the time, the on-board com¬ puter functions and the SIA service interval indicator. Between the large needle instruments are the indicator and warning lamps and the program and gear display. The program and gear display is only featured in vehicles with automatic transmissions and SMG sequential manual gearboxes. The instrument cluster is the central gateway in the bus network. System overview 1. Parking Brake Switch 2. Brake Pad Wear Sensors 3. Coolant Level Switch 4. DSC Control Unit 5. Oil Pressure Switch 6. Turn Signal Switch 7. Starter Terminal 30H 8. Reverse Light Switch (Manual Trans Only) 9. Instrument Cluster 10. Ground Supply Terminal 31 11. Fuse Box 12. Outside Temperature Sensor 13. Fuel Tank Sensor 1 14. Fuel Tank Sensor 2 15. PT-CAN Bus 16. K-Bus 17. D-Bus 4 Driver Information 1. Brake Pad Wear Sensor (LF) 2. DME 3. DSC 4. Outside Temperature Sensor 5. Coolant Level Switch 6. Oil Pressure Switch 7. Instrument Cluster 8. Turn Signal Switch 9. Reverse Light Switch (Manual Trans Only) 10. Fuse Box 11. Parking Brake Switch 12. Fuel Tank Sensor 1 13. Fuel Tank Sensor 2 14. Brake Pad Wear Sensor (RR) Instrument-cluster plug connection The 26-pin plug connection is located on the reverse side of the instrument cluster. New system features/modifications The main feature of the instrument cluster in the Z4 is its new design: • The indicator and warning lamps between the needle instruments. The coolant temperature gauge and the fuel gauge are integrated in the tachometer. • Additional indicator and warning lamps (e.g. Electric Power Steering EPS) are integrated. • The automatic gearbox or Sequential Manual Gearbox SMG has a liquid-crystal display for indicating the gear. • The instrument cluster of the Z4 has a gateway function between the bus systems (as in the E46) K bus, PT-CAN bus and diagnosis bus. • The lighting of the instrument cluster is controlled by means of the K bus. • The instrument cluster has a modified voltage supply with undervoltage detection. • The acoustic alarms and test functions have been expanded. 5 Driver Information System Components The instrument-cluster system comprises the following components: • Needle instruments • Indicator and warning lamps • LC display • Program and gear display for automatic gearbox and SMG Sequential Manual Gearbox • Acoustic generator for outputting acoustic alarms • Acoustic generator for outputting turn-signal flasher rate • Two setting buttons, integrated in instrument cluster • Connected components which serve to activate the displays/ indications in the instru¬ ment cluster (see system overview/system schematic) Display areas The instrument cluster is divided into the following display areas: • Needle instruments • Indicator and warning lamps • LC display • Program and gear display for automatic gearbox and SMG Sequential Manual Gearbox Instrument-cluster lighting The speedometer and the tachometer are illuminated by slit light between the dial face and the graduated dial. The brightness of the dial-face, needle and display illumination (dim¬ ming) is determined by the LSZ light switch center. The lights ON signal is transmitted from the LSZ light switch center to the instrument cluster (via the K bus). The dimming signal is also transmitted via the K bus. The LSZ evaluates the following input signals to control dim¬ ming: • Dimmer (knurl in light switch center) • Photoelectric cell for ambient brightness (in light switch center) Because the dimming signal is sent via the K bus, there is no need for terminal 58g. 6 Driver Information Instrument Cluster Power Supply An integrated power supply unit (switching controller) delivers the supply voltage to the instrument cluster. The lighting of the instrument cluster is therefore not dependent on the vehicle electrical system and no fluctuations in brightness can occur in the event of distur¬ bances in the electrical system. Undervoltage detection The instrument cluster incorporates an undervoltage-detection facility. Undervoltage detec¬ tion is performed in the instrument cluster with the aid of a comparator (software-based voltage comparison). Note: Overvoltage in the electrical system is also detected. In the event of a system voltage > 16 volts, it is possible for: • Inputs and outputs to be deactivated • Indicator and warning lamps to be deactivated or dimmed for the duration of the over voltage Coolant temperature gauge In the event of coolant overtemperature, a warning sound is issued when the red indicator and warning lamp lights up. The signal is delivered by the DME via the PT-CAN bus. Fuel gauge The indicator lamp is activated when the fuel reserve drops below a threshold coded at the plant (standard = 8 liters). Indicator Lamps There are a total of 24 indicator and warning lamps in the instrument cluster of the new Z4. The following two lamps are new additions to the established lamps: • Indicator lamp for EPS: The Electric Power Steering system is used in the new Z4 for the first time. • Indicator lamp for lamp monitoring: This lamp indicates lamp failure in the headlights, rear lights and brake lights and is activated by the light switch center. The instrument cluster receives input signals through the following channels: • Via the K bus • Via the PT-CAN bus • Directly from the sensors 7 Driver Information | Symbol Color Meaning Activated By Active From Pre-Drive Check Terminal Green LVS Turn Signal LSZ (K bus) Terminal R Green Turn-signal flasher, right LSZ (K bus) Terminal R Red Battery charge (Terminal 61) DME (PT-CAN bus) Terminal 15 Blue Main beam/light signal LSZ (K bus) Terminal R Red Red Low oil pressure switch Terminal 15 Yellow Low oil level DME (PT-CAN BUS) Terminal 15 Yellow ABS Inactive DSC via sperate line Terminal 15 1 s yellow and then 1 s red Driver Information Color Meaning Activated By Red General brake warning light: Parking brake. Handbrake Switch Red Low brake-fluid level DSC (PT-CAN bus) Red EBV inactive DSC (PT-CAN bus) Yellow DBC Inactive DSC (PT-CAN bus) Yellow Brake-lining wear Brake-lining wear sensors and algorithm in instrument clus¬ ter Green Front fog lamps LSZ (K Bus) Yellow Fuel reserve Fuel-tank sensor and algorithm in instrument clus¬ ter Terminal Terminal 15 and terminal 58 1 s yellow and then 1 s red (if Coded) Driver Information @! 0 ) 5 Color Meaning Yellow Electric Power Steering EPS Yellow System failure or during ini¬ tialization Red Tire-pressure loss Red Airbag Red Fasten seat belts Yellow Check Control (lamp fault) Yellow Gearbox limp-home program Activated By Active From Terminal Pre-Drive Check ASE (K bus) Terminal R LSZ (K bus) Terminal 15 1 s yellow and then 1 s red (if coded) Driver Information 11 Driver Information Predrive Check The Predrive Check is a test of important indicator and warning lamps. In the Predrive Check, these indicator and warning lamps are activated for 2 seconds with terminal 15 ON. All the indicator and warning lamps are deactivated at the end of the Predrive Check. LC Display The LC display is located between the speedometer and the tachometer. With terminal 15 OFF, run-on operation is possible provided the SMG is still transmitting CAN telegrams. The LC display is integrated in the speedometer. It has been adapted to the E85 instrument cluster and operates in the same way as that of the E46. LC Display Program and Gear Display 1. Program Mode 2. Drive Position Program and Gear Display In cars fitted with an automatic gearbox (5HP19) or an SMG Sequential Manual Gearbox, the program and gear display is featured in a separate LC display. Acoustic generators Depending on the incident, the acoustic alarms are output once or intermittently. The following acoustic alarms are new: • Coolant overtemperature • Fuel-reserve threshold 1. Acoustic Relay 2. Internal Speaker 12 Driver Information Seat Belt Reminder The seat-belt reminder for USA is activated with terminal 15 ON if the seat-belt contact is not closed. The acoustic alarm is intermittent and lasts for max. 6 seconds. After this time has elapsed, only the indicator and warning lamp remains lit. Setting Buttons 2 setting buttons are located between the 2 large needle instruments. 1. S/R for Set/Reset 2. Clock The left button (S/R for Set/Reset) is used to reset the trip odometer reading, to call up the test functions and to call up the reset menu for the service interval indicator. The right button (clock symbol) is used to set the time and to switch the service interval indicator (remaining distance/service date or vice versa). (To set clock, press and hold but¬ ton #2 until hour flashes, then tap to change hour, press and hold again until minutes appear.) System functions Bus network The instrument cluster is the central gateway (interface) for the bus network: The bus systems PT-CAN bus, K bus and diagnosis bus and the byteflight are intercon¬ nected in the instrument cluster. The byteflight is connected via the Safety and Information Module SIM (= gateway) to the K bus. 13 Driver Information K-Bm JH1W DM5 EW5 HI RA0*0 Did IHKS IMS FIS PDC CDC WAV EZV1 CVWI HIFI VM SM LSZ TEL STYL” STVH PT-CAN LW5 DEC □ME ECS SMQ ecsflBCn KWT’iDW Instrument cluster as gateway The instrument cluster is the interface between K bus, PT-CAN bus and diagnosis bus. The instrument cluster communicates with other control units in the car via the K bus (single¬ core) or the PT-CAN bus (two-core). On-board computer The on-board computer functions are the same as those of the E46. A new feature in the E85 is the possibility of combining time and outside temperature in the display depending on the equipment specification. On-board computer display in navigation-system on-board monitor In cars equipped with the High navigation system, the on-board computer functions are displayed in the pop-up on-board monitor (Central Information Display CID). The "Distance to junction" navigation data is displayed in parallel in the instrument cluster. Settings (e.g. units or reset) which are made at the navigation system controls using the rotary pushbutton are sent by bus telegram to the instrument cluster. The date can be set at the navigation-system controls. The date is administered in the instrument cluster and shown in the onboard monitor. 14 Driver Information Redundant data storage (RDA) The kilometer reading/mileage and the data of the SIA service interval indicator are stored redundantly in the following control units: instrument cluster, LSZ light switch center and EWS electronic immobilizer.The above-mentioned data are thus retained when the control units are replaced. Notes for Service Test functions The test functions are used by service mechanics to check the coding. They also provide help in troubleshooting without the diagnostic tester. The test functions are only shown in the instrument-cluster LC display. The test functions are activated by pressing the left setting button in the instrument cluster (S/R, 5 seconds) with terminal R or terminal 15 ON. In addition, the test functions can still be called up by pressing the left setting button (S/R for Set/Reset) in the instrument cluster with simultaneous activation of terminal R. The test functions are shown in the odometer and trip-odometer display areas in the top line of the display. The display of the on-board computer function is retained in the bottom display line. E85 Test Functions Test 7.1 Outside temperature (24.9°C) Test function 19 Only the first two test functions are freely accessible. All further test functions are locked from the third test function. The lock can only be removed by means of test function 19. In test function 19, the display switches in intervals of 1 second from L_on to L_oFF (Lock on and Lock off). The test functions are unlocked or locked by pressing the left setting but¬ ton (S/R for Set/Reset). 15 Driver Information Unlocking test functions If while L_oFF is displayed the left setting button (S/R for Set/ Reset) in the instrument clus¬ ter is pressed, the test functions remain unlocked or are unlocked. The display jumps to test function 0. Locking test functions If while L_on is displayed the left setting button (S/R for Set/Reset) in the instrument clus¬ ter is pressed, the test functions remain locked or are locked. The test functions must oth¬ erwise always be locked by means of the test function 19. Note The test functions are always locked after a terminal has been changed. Terminating test functions The test functions are terminated by terminal R OFF. With terminal R ON, the test functions are exited by: • Pressing the left setting button (S/R for Set/Reset) for longer than 5 seconds • Calling up the test function 21 Overview of test functions _tEST_0_ ExitTest Functions _tEST_6._ Fuel Level _tEST_10. CAN Monitor _tEST_1 Info roll _ tEST _ 6.0 Tank Sensors L/R in 1 _ tEST_10.0 DSC _ tEST _ 1.0 Vin Last 5 _tEST_6.1 Avg Sum Tank Sensors _tEST_10.1 DME _tEST_1.1 K-Number _tEST_6.2 Fuel Gauge in Liters 2JESTC10.2 DME 4 _tEST_1.2 BMW Part No. tEST^.l Display Values _tEST_11. Not Used _ tEST _ 1.3 Coding Indexes _ tEST _ 7.0 CoolantTemp °C _tEST_12. Not Used _ tEST _ 1.4 Date of manufacturer _ tEST _ 7.1 Outside Temp _tEST_13. , AccousticGenerator _ tEST _ 1.5 HW/SW Status _ tEST _ 7.2 Engine RPM _ tEST _ 13.0 Trigger Single Sound _ tEST _ 1.6 EEPROM CheckStatus _ tEST _ 7.3 Vehicle Speed tEST 14. Not Used _ tEST _ 1.7 CAN Index _tEST_8._ ADC Values tEST I 5. I/O Ports Processor _tESTW2./ Visual Test System _ tEST _ 8.0 ADC System Voltage _tEST_16.- Fault Memory _tEST _ 2.0 Cluster Self Test _tEST _ 8.1 ADC Tank Sensors L/R _ tEST _ 16.0 Number of Faults _tEST_3._ SIA Information _tEST_8.2 ADC Brake Sensors _tEST_17._ Not Used rtEST_3.1 Liters SIA _tEST_8.3 ADC Temp Sensor _tEST_18._ Not Used _tEST03.2 Days SIA tEST 9. System Voltage _tEST_19. Lock tESTL4.“ Fuel Consumption T/tEST _ 9.0 System Voltage _ tEST _ 19.0 Lock on/off _ tEST _ 4.1 Consumption LVIOOkm _tEST _ 9.1 Voltage Power Supply _tEST_20._ Not Used hUESTC4.2 Consumption LVHour T/tEST _ 9.2 ADC Brake Sensors _tEST_21. Software Reset _tEST_5.~ Range UtEST _ 9.3 ADC Temp Sensor _ tEST _ 21.0 Reset Cluster rtEST_5.0 Range L/IOOkm htES-TjS.I Range current km 16 Driver Information Visual system test In the visual system test, all the indica¬ tor lamps and lights - with the excep¬ tion of the ABS warning lamp - are acti¬ vated briefly. The needle instruments are moved from the lower to upper stop and back again. Diagnosis Component replacement and trial replacement There are three possible combinations for replacing the instrument cluster/light switch center: • Instrument cluster faulty, light switch center OK • Light switch center faulty, instrument cluster OK • Light switch center and instrument cluster must be replaced Simultaneous replacement of the light switch center and the instrument cluster must be avoided. The odometer reading will be lost. In principle it is also possible to carry out a trial replacement of the instrument cluster/light switch center. Car & key memory There are different car-memory functions for the E85 with regard to the display of units in the instrument cluster. Car memory Setting Explanation 1 Distance km mis The clock must be reset after the unit display has been changed. [Time 12 h 24 h AM/PM is also displayed in 12 h mode. Temperature Degrees Celsius Degrees fahrenheit Basic setting Ice Warning Active/not active Active: If the outside temp drops below approx. +3°C the acoustic ice warning is issued. The outside-temp displayed flashing for several sec. Display reverts back. Not Active: If the outside temp drops below +3°C:(Acoustic warning,Permanent Display) 17 Driver Information SIA IV service interval indicator The present SIA IV is the service interval indicator to be found in the current E46. Diagram of reset routine for service interval indicator. 18 Buhon yj-i ic-r ■ 5 second; :'r r r.I rfHliK Hi nj Sct/tc uji-i 'mil ntwl| D 4 -lay EaivKfl jLUllS. uiB. ,ii i H: F iinJinl f, E111>-11 " 11111 S' DspQr 3*:l Ka I ns ■ta r imena Dsplif dm E imj^hai FdfllVW KJIII .« ralua |«lhre«IJ E^IIX FVCi-HMT Fh-iji ir^ -III LUjHtoi Ml, .1, .>1] Oil! I> iHurdg D:p^|i Enq SIA fc* 2 Sercn .+ 1 K«P Ifrt pipiwjpnd 'i’iiii n-L II (Ft L A ( * > Tan Funcwn \ J 1-dLu FJhIh ... R uiii Ih'iiiiuI lfi OFF Driver Information Review Questions 1. Are the Brake Pad Warning Sensors wired in Series or Parallel to the Instrument Cluster? 2. How is the instrument panel illumination controlled on the Z4? 3. What functions does the left button on the instrument cluster (S/R) perform? 4. Which vehicle bus systems are connected directly to the instrument cluster? 5. In what locations are the mileage and SIA information stored redundantly? 6. Why must simultaneous replacement of the instrument cluster and LSZ be avoided? 7. At what approximate fuel level is the Low Fuel Indicator Lamp activated? 8. How do you know which lamp is defective if the Lamp Monitoring Indicator lamp is on? 9. What are the possible meanings of this warning symbol if it is displayed in RED? 19 Driver Information