課件參考培訓(xùn)instruments

1、INSTRUMENTSGeneralInstrument packs only differ in the following features: Mph or km/h speedometerInstrument packs only differ in the following features: Tachometer maximum rev/min bandInstrument packs only differ in the following features: Mph or km/h odometer and trip displayInstrument packs only d

2、iffer in the following features: Message centre language displayInstrument packs only differ in the following features: Ambient temperature display C or FTotally electronic, receiving analogue or digital signals via hardwired or bus systemsTwo microprocessors process signals to transpose data into a

3、nalogue gauge indications or warning lamp illuminationConnected to the vehicle electrical system by three connectors which provide all input and output connectionsNo internal components are serviceable, except five 1.5W LCD backlighting illumination bulbsGeneralTwo main functions; to provide informa

4、tion of vehicle status and to process and relay digital signals from and to other system ECUsInstrument pack features the following displays: Tachometer - large analogue displayInstrument pack features the following displays: Speedometer - large analogue displayInstrument pack features the following

5、 displays: Fuel gauge - small analogue displayInstrument pack features the following displays: Engine coolant temperature gauge - small analogue displayInstrument pack features the following displays: Engine service data - LED illuminatedInstrument pack features the following displays: Gearbox/trans

6、fer box status indicator - LED illuminatedInstrument pack features the following displays: Odometer - LCDInstrument pack features the following displays: Trip meter - LCDInstrument pack features the following displays: Ambient temperature - LCDInstrument pack features the following displays: Message

7、 centre - LCD.Warning LampsWarning lamps can be split into two groups; self controlled and externally controlledSelf controlled lamps are dependant on software logic within the instrument pack for activationSoftware controls lamp check illumination and all pack controlled lampsExternally controlled

8、lamps are supplied with a current from another system controlling ECUExternally controlled lamps are also triggered by the pack on receipt of a bus message from another ECUSome lamps are activated by an external ECU, but the control logic is retained within the packExample; LCM controls and synchron

9、ises direction indicator warning lamps, but lamp illumination logic is retained within the pack.SpeedometerAn electrically driven, analogue instrument for displaying the vehicle speedPointer needle is oil damped to prevent impacts on the vehicle wheelsDriven by a square wave signal derived from the

10、ABS ECUSpeeds are passed to the ABS ECU in the form of pulsed signalsInformation is passed from ABS ECU, on a hardwired connection, to one of the instrument packs microprocessorsMicroprocessor applies a formula to the signal and calculates a numerical, 16 bit value for the signalSignal is then used

11、to display the current speed to the driverMicroprocessor introduces a time delay on the output signal if the received speed signal increases too quickly, preventing incorrect readings due to spinning wheelsDelay ensures that only the true speed is displayed and transmitted on the bus systems.Tachome

12、terElectrically driven, analogue instrument for displaying vehicle engine speedPointer needle is oil damped to prevent impacts on the vehicle wheelsDriven by an engine speed signal transmitted on the CAN from the ECMTwo versions of the tachometer are used for petrol and diesel engine variants: Petro

13、l engine variants use a display which has a maximum engine speed reading of 7000 rev/minTwo versions of the tachometer are used for petrol and diesel engine variants: Diesel engine variants use a display which has a maximum engine speed reading of 6000 rev/min.Fuel Level GaugeElectrically driven, an

14、alogue instrument for displaying the fuel tank contentsPointer needle is oil damped to prevent impacts on the vehicle wheelsWhen the ignition is off, the pointer returns to the empty positionConnected to two tank level sensors, one is located in each side of the saddle type fuel tank and uses a floa

15、t operated potentiometerEach tank level sensor is supplied with a current from the instrument packReduced current from both sensors is evaluated and converted into a signal to position the fuel gauge needleWhen microprocessor determines fuel has reached a predetermined level, the low fuel level warn

16、ing lamp is illuminated and a chime is emitted.Potentiometer Resistance ValuesTwo versions of the fuel level gauge are used: Markets with a kilometres only speedometer use a percentage gauge reading marked 0 - 100%, with graduations of 0, 25, 50, 75 and maxTwo versions of the fuel level gauge are us

17、ed: Markets using miles and kilometres speedometer readouts use an imperial fraction reading marked 0 - 1, with graduations of 0, , , and 1.Tank Sensor Potentiometer Resistance Left/RightGauge Needle Pointer Position20/200146/12125% / 280/21350% / 396/32375% / 500/428100% / 1/1The figures are shown

18、as a guide only because an infinite number of left/right sensor resistance values can be obtained.Engine Coolant Temperature GaugeElectrically driven, analogue instrument for displaying the engine coolant temperaturePointer needle is oil damped to prevent impacts on the vehicle wheelsWhen the igniti

19、on is off, the pointer returns to the cold positionConnected via two wires to the ECT sensorSensor has a four pin connector, with the remaining two pinsconnected to the ECMInstrument pack outputs a signal voltage to the sensor and measures the returned signalSensor resistance falls as the coolant te

20、mperature increasesEngine coolant temperature is available for use by other vehicle systems via the CAN.Gauge Needle Pointer PositionEngine coolant temperature gauge is the same on all pack variants.Coolant TemperatureGauge Needle Pointer Position15.00C (59.00F)At beginning of blue segment50.25C (12

21、2.45F)At end of blue segment95.25C (203.45F)At centre of display126.00C (258.80F)At centre of red segmentLiquid Crystal DisplayInstrument pack has four separate LCDs which show the following data: Odometer - Displays the total vehicle distance travelledInstrument pack has four separate LCDs which sh

22、ow the following data: Trip meter - Displays total vehicle distance travelled since last resetInstrument pack has four separate LCDs which show the following data: Ambient temperature - Displays the external ambient temperature in C or FInstrument pack has four separate LCDs which show the following

23、 data: Message centre - Displays system information to the driverOdometerTrip meterAmbient temperatureMessage centreIlluminated by backlighting which is provided by five 12V/1.5W single filament bulbsBacklighting has manual and automatic brightness controlManual control is only available when the li

24、ghting switch is on and is operated using the illumination dimmer rheostatAutomatic adjustment is controlled by one of the instrument pack microprocessors and a phototransistorPhototransistor is located in the instrument pack.PhototransistorOdometerDisplays the total distance which the vehicle has t

25、ravelledOdometerCalculated by one of the microprocessors using wheel speed signals received from the ABS ECUTotal mileage information is made available to other systems on the I and K Buses and is only transmitted in kilometresWith ignition off, pressing left hand instrument pack button, allows the

26、odometer reading to be displayed for 25 secsTotal distance is also recorded in the instrument pack EEPROM and RAMThis is recorded after every 2 kilometres travelled and transmitted to the LCMThis data is stored and compared to that of the instrument pack to protect against illegal alteration of the

27、odometer readings.Trip MeterDisplays total distance travelled since the last trip meter reset, up to 999.9 miles or kilometresTrip meterCalculated by one of the microprocessors using the wheel speed signals from the ABS ECUTrip meter LCD also contains a small dot, known as the manipulation pointMani

28、pulation point shows if there is a total distance travelled or other data discrepancy between the instrument pack and LCM.Ambient TemperatureNTC type sensor is located behind the Land Rover badge on the front grill and is connected directly to the instrument packAmbient temperatureInstrument pack ou

29、tputs a reference current of 5.1V to the sensorMicroprocessor evaluates the returned signal, converts it into a temperature value and displays it in the LCDDisplay can be adjusted by TestBook/T4 to be displayed in either Celsius or FahrenheitInstrument pack continuously transmits the ambient tempera

30、ture signals on the CAN for use by other systemsWith ignition off, instrument pack transmits ambient temperature message on I/K bus, once every 10 minutes, for a duration of 400msSensor is capable of reading temperatures in the range of -45C (-49F) to +56C (+132.8F)Ambient TemperatureAmbient tempera

31、tureLCD will display minimum temperatures to -40C (-40F) andmaximum temperatures to +50C (+122F)LCM monitors the temperature signals output on the bus systemsIf temperature falls to 3C (37.4F) or below, the LCM outputs a message signal to instrument pack, when the ignition is onInstrument pack displ

32、ays a message, EXTERNAL TEMPERATURE, with the recorded temperature alongsideDisplay time of the message is between 6 and 15 seconds, dependant on other displayed messages.Message CentreComprises an LCD, which has a 20 character text displayMessage centreMajority of messages are generated by the LCM

33、which monitors system status via the bus systemsOther system ECUs are also capable of generating messages to display system statusMost messages are accompanied by a chime, which is requested by the ECU generating the messageA check control button is located between the tachometer and the temperature

34、 gaugeButton allows the driver to view system status messages which are current in the instrument pack RAMPressing and releasing the check control button, displays current messages in priority order or, displays CHECK CONTROL OKMessages are assigned priorities, depending on the effect on driving saf

35、ety and driving ability of the vehicleMessage CentreMessage centreNew messages are displayed and accompanied by a chime from the sounderMessages are divided into priority groups P1, P2 and P3Priority Group P1: Messages which have a direct affect on the driving ability and safety of the vehiclePriori

36、ty Group P1: Requires an urgent and immediate reaction from the driver in response to the messagePriority Group P1: P1 messages are also accompanied by appropriate flashing warning lamp symbolsPriority Group P1: If more than one P1 message is present, each message is displayed in turn at 3 second in

37、tervalsPriority Group P2: Messages which do not directly affect driving ability or safety of the vehicleMessage CentreMessage centrePriority Group P2: Message must be noted by the driver and the cause rectified as soon as possiblePriority Group P2: Each message is indicated once for a maximum of 23

38、secondsPriority Group P2: Recalled by pressing the check control, RH, button on the instrument packPriority Group P3: Messages which relate to fluid levelsPriority Group P3: Some messages are only displayed at the end of a journey, to avoid irritation to the driverTwo other groups are defined as End

39、 of Journey Messages and Special Messages S and S1:End of Journey Messages: P1 and P2 error messages are displayed again at the end of the journeyMessage CentreMessage centreEnd of Journey Messages: P3 messages are displayed after the P1 and P2 messageEnd of Journey Messages: New messages, which onl

40、y occur at the end of a journey, are displayed according to their prioritySpecial Messages S and S1: These messages have the highest priority and cannot be overridden by messages in groups P1, P2 and P3Special Messages S and S1: They immediately overwrite any currently displayed messagesSpecial Mess

41、ages S and S1: Message with the highest priority has priority, after the current displayed message has been shown for at least 1 secondMost messages, especially S, S1 and P messages are accompanied by a chimeFor 3 minutes after the ignition is switched off, messages can be displayed using the check

42、control RH buttonMessage CentreMessage centreIf no messages are present, CHECK CONTROL OK will be displayedMessages are displayed in a language applicable to the vehicle market configuration and can be changed using TestBook/T4.Service Interval Indicator DisplayInformation fieldTIME INSPECTIONInform

43、ation arrowInformation fieldOIL SERVICEInformation fieldINSPECTIONControlled by one of the microprocessors and software in the instrument pack and the data stored in the EEPROMCalculated on fuel consumption which represents the loads placed on the engineA vehicle which is driven aggressively will re

44、quire a service earlier than a vehicle which is driven economicallyService interval data is displayed in the odometer for 5 seconds, every time the ignition is switched on.Remaining Distance DisplayWith ignition on, the remaining distance to service is displayed for 5 seconds in the odometer LCDSimu

45、ltaneously, the next service type will also be displayed in the service interval indicatorA minus sign indicates that the service interval has been exceeded and the distance by which it is overdue.Distance displayDue Date DisplayWhen remaining distance displayed, a second press of the LH button, wit

46、hin the 5 seconds, illuminates the TIME INSPECTION clock symbol for an additional 5 secondsDistance to service information changes to the due date of the service by showing the month and yearIn the above example, the month is December and the year is 2003If the LH button is pressed again, within 5 s

47、econds, the odometer LCD changes to the distance remainingService Interval Indicator Reset Service interval can be reset using the instrument pack buttons or TestBook/T4 (See training workbook for procedure).Gear Position DisplayGear position display and the low range lamp are controlled by the EAT

48、ECU and the transfer box ECUGear position is illuminated in response to CAN messages from the EAT ECUInstrument pack has no control over gear position display, but monitors the controlling CAN messagesIf the instrument pack detects ten incorrect CAN messages, “TRANS. FAILSAFE PROG” is illuminatedIf

49、a correct CAN message is received when the ignition is next switched on to position II, the error is erased and the message removedIn Sport or Manual mode, the instrument pack detects the CAN message for these selections and displays the applicable message.Functions and MID Computer ControlsOn-board

50、 computer functions can be displayed in the instrument pack message centre, on a MID or a MFD, depending on vehicle specificationOn-board computer functions are: Time of dayOn-board computer functions are: DateOn-board computer functions are: Reminder signal (MEMO)On-board computer functions are: Am

51、bient temperature (only displayed in instrument pack LCD and MFD)On-board computer functions are: Average speedOn-board computer functions are: Anticipated fuel tank rangeOn-board computer functions are: Input of distance between journey start and end points (only on MID and MFD) (DISTANCE)On-board

52、computer functions are: Anticipated arrival time (ARRIVAL)On-board computer functions are: Average fuel consumption (CONSUMPTION 1 & 2)Multi-information display (MID)Information buttonColumn stalk information buttonFunctions and MID Computer ControlsOn-board computer functions are: Speed warning (LI

53、MIT)On-board computer functions are: Stop watch (TIMER) or switching points for park heating/park ventilation (TIME 1 & 2)On-board computer functions are: Anti-theft protection (CODE).Multi-information display (MID)Information buttonColumn stalk information buttonMFD Controls and On-Board Computer O

54、perationFunctions are selected in the MID by pressing the i button and from a menu on the LCD or by pressing the clock symbol for clock timer functions on the MFDI button on the LH column stalk switch scrolls through all possible computer function messages and also resets certain functionsCODE, MEMO

55、, EXTERNAL AIR TEMPERATURE and HEAT ON/OFF AIR ON/OFF functions are only available using the MID/MFDMID/MFD can also display a four digit security CODEInstrument pack supplies MID/MFD with data and commands on the I BusInstrument pack software calculates the text and numerical values to be displayed

56、.Multi-function displayColumn stalk information buttonOn-Board Computer Functions with Column SwitchColumnStalkswitchSequence of displayed functions can be programmed by the driverLast displayed function will reappear in the message centre If the function display is interrupted by a system message f

57、rom the LCMOn-board computer function is only displayed if the LCM releases the message centre for function displayThis only occurs if the LCM is not displaying any high priority messages at the timeIf there are no messages or the displayed message is of a low priority, the on-board computer functio

58、n is permitted use of the LCD message centre.Standard Sequence of DisplayColumnStalkswitchOn-board computer functions and sequence of display: CLOCK CONSUMPTION 1On-board computer functions and sequence of display: CONSUMPTION 2 RANGEOn-board computer functions and sequence of display: LIMIT DISTANC

59、EOn-board computer functions and sequence of display: ARRIVAL SPEEDOn-board computer functions and sequence of display: DATE TIME 1 (only with park heating and/or park ventilation)On-board computer functions and sequence of display: TIME 2 (only with park heating and/or park ventilation) TIMERStanda

60、rd Sequence of DisplayColumnStalkswitchThese functions can only be selected with the MID or MFD: HEAT ON/OFF (heating on/off) AIR ON/OFF (ventilation output on/off)These functions can only be selected with the MID or MFD: OUTSIDE TEMPERATURE CODE.MFD ProgrammingIgnition switch in position I (AUX) or