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User Manual - X

1. 6 8 Display Intensity Intensity of the X Gauge display can be adjusted in 10 steps for day as well as for night driving conditions Depending whether the driving lights of your car are switched on or off the display intensity can be chosen to be dimmer at night and brighter during the day X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 9 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 6 9 Module Specifications 7 Operation The X Gauge responds to the following events Ignition on off Driving lights switch on off Left Button Right Button Left and right button designations are defined as viewed from the driver s seat Since user opera tion is limited to two buttons a distinction is made whether a button is pushed and released within 2 seconds short or pushed down for more than 2 seconds long Button activity is abbreviated throughout the following descriptions as shown in the box below LEFT button pushed SHORT LEFT button pushed LONG RIGHT button pushed SHORT RIGHT button pushed LONG X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 10 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch
2. The type setting determines if the display is shown normally white on black or inversed black on white Horizontal and or vertical flip settings are intended for non standard installations of the X Gauge Enabling both settings with Yes for instance will rotate the display by 180 de grees The two flip settings will not take effect immediately this would get rather confus ing but will so after the submenu is exit with RBS Horizontal Flip Vertical Flip Display Orientation No No No Yes Yes No Yes Yes X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 28 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 6 Submenu Set Time This submenu for setting actual time consists of 3 selections as show below RBS RBS RBS Exit Submenu Functionality of buttons while in submenu Switch time format between 24h 12h or increment setting for hour or minute Increment setting for hour or minute automatically 3 times per second Accept setting and move to next selection Exit submenu after last selection Exit submenu without accepting any new time settings Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new time settings Having only 2 buttons available ho
3. Fill gas tank completely reset the car s trip odometer and reset Mileage parameter of X Gauge Make sure that the gallon setting US or UK is set according to the gallons used by your country s fuel pumps At next fill up write down trip odometer reading km or miles fuel liters or gallons that were needed to completely refill the gas tank and Mileage 100km or mpg as shown by the K Gauge X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 22 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Adjust correction factor according to factor must be rounded up or down to the nearest even percentage number for Metric units 100x Fueltiiters Correctiongg 100x Odometer a X Mileage 00km 1 example fuel required for fill up 31 5 liters distance driven until fill up 595 km X Gauge Mileage shown at fill up 5 5 1 100km 4 rounded up from 3 74 set correction factor to For English units Odometer niles Correction 100x Fuel gallons x Mileagermpg example fuel required for fill up 8 65 gallons distance driven until fill up 361 miles X Gauge Mileage shown at fill up 38 2 mpg set correction factor to 10 rounded up from 9 25 X Gauge User Manual Version 1 7
4. Once the X Gauge is installed can I convert it back to the cockpit clock at a later time Yes if you ve kept all parts from the cockpit clock that were not needed for the X Gauge conversion then you can put the clock back together at any time No parts of the clock get altered in any way Only the 3 wire cable that was removed from the clock module must be re soldered Does the X Gauge drain my car s battery if the car is not driven for an extended pe riod Not at all When ignition is turned off the X Gauge actually draws less current from the battery than the original cockpit clock Does the X Gauge modify my car s ECU programming in any way No All the X Gauge does is sending requests to the ECU for receiving selected parame ter data If the ECU is not occupied with any higher priority tasks it will respond to such requests X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 41 45 07 AT 08 AN 09 A9 Q10 A10 011 All Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Once the X Gauge is installed can the mechanic at the smart dealership still use his diagnostic equipment on my car Yes The mechanic can unplug the X Gauge s OBD connector at any time in order to connect his diagnostic equipment instead Just make sure that the X Gauge s OBD con n
5. 10 seconds If problem still exist Turn ignition off for approximately 30 sec onds and then back on again If problem still exist Underneath your dash make sure that the two OBD wires of the K Gauge are inserted 44 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch properly into the OBD connector shell and that this shell is seated correctly into the car s OBD socket If problem still exist Verify that none of the wires at the X Gauge module are broken off X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 45 45
6. welte engineering ch 6 Features and Specifications 6 1 Non ECU Parameters These parameters are displayed by the X Gauge independently of the ECU This means that if a display mode is set up for displaying only non ECU parameters no communications will take place between the X Gauge and the ECU over the car s OBD interface The top right pixel of the display is always used as an indicator for communication activities between K Gauge and ECU The pixel will be flashing whenever parameters are retrieved from the ECU It will stay dark when no data is being exchanged Time User selectable to be either shown as a 12h or 24h clock Accuracyt 10 ppm 26 seconds month CC With automatic leap year correction Battery Voltage 8 0 16 0 V Accuracyt 0 5 Inside Temperature 20 0 60 0 C Inside temperature as measured by a sensor located on the 4 0 140 F X Gauge module Accuracyt 1 C 3 tNot production tested Because the sensor for measuring the car s Inside Temperature is located within the X Gauge s housing the displayed temperature might not always reflect the actual cabin temperature e g when dash is exposed to direct sunlight X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 5 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 6 2
7. 0 50 bar boost 2 55 bar 1 55 bar maximal boost that the ECU will report A fixed ambient pressure can be set via the user menu so that the K Gauge will display a relative intake pressure negative values for vacuum positive values for boost Ambi ent pressure is however dependent on altitude temperature and weather conditions so that the relative pressure display can only be accurate within these limitations 013 Why isn t the X Gauge compatible with smart models after 2006 fortwo 451 A13 Starting with model year 2007 fortwo 451 smart has changed to a newly mandated OBD protocol CAN Bus that the X Gauge has not implemented In addition the clock pod itself is different and will not accommodate the PCB of the current X Gauge hardware X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 43 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 9 3 Troubleshooting Before returning a suspected malfunctioning K Gauge for repair please check through the fol lowing symptoms and their possible remedies X Gauge does not turn on if either left or right button is pushed while ignition is OFF X Gauge does turn on temporarily for 30 seconds if either left or right button is pushed while ignition is OFF but it does NOT turn on when ignition is ON X Gauge does turn on when
8. Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 8 Submenu Select Units This submenu for selecting units consists of 5 selections as show below RBS Exit Submenu Functionality of buttons while in submenu Change setting between C F bar psi g s 1b min km h mph or 1 100km mpg not used Accept setting and move to next selection Exit submenu after last selection Exit submenu without accepting any new units settings Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new units settings X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 31 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 9 Submenu Select Language Language to use for parameter descriptions and menu text are selected with this submenu RBS gt Exit Submenu Functionality of buttons while in submenu Change language English Deutsch Fran ais Italiano Espa ol Change setting between languages automatically 3 times per second Accept selected language setting and exit submenu Exit submenu without accepting any new language setting Notes Submenu is exit if neither RBS nor LBS a
9. Enter Main Menu X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 16 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Changing Parameter Assignment Hitting RBS repeatedly will move the display location for changing parameter assignment or On Off selector with the currently selected location being highlighted The picture sequence be low shows how the display may look like if RBS is hit repeatedly for the display example shown above RBS RBS Once a desired display location is reached hitting LBS repeatedly will cycle through the available parameters according to the tables shown in chapters 6 1 6 2 and 6 3 If the desired parameter is reached RBS can be pushed again for moving to the next display location If neither RBS nor LBS are pushed within 4 seconds parameter assignment gets finalized and highlighting of the currently selected location is turned off Notes Only numeric parameters suitable for graphical display can be selected with LBS Parameter assignment is saved even if display mode is changed or ignition gets turned off Display location that was selected last by RBS is saved also For instance if On Off selec tor was selected last LBS can be pushed at any time for enabling disabling updating of graphs Initial RBS will highlight the current display location wi
10. a desired display location is reached hitting LBS repeatedly will cycle through the available parameters according to the tables shown in chapters 6 1 6 2 and 6 3 If the desired parameter is reached RBS can be pushed again for moving to the next display location If neither RBS nor LBS are pushed within 4 seconds parameter assignment gets finalized and the display will return to showing the values of the assigned parameters Notes Parameter assignment is saved even if display mode is changed or ignition gets turned off Display location that was selected last by RBS is saved also For instance if display loca tion is set to be the center line LBS can be pushed at any time for changing the parameter displayed in the center line Initial RBS will highlight the current display location without changing it Subsequent RBS will advance display location sequentially When cycling through the parameters with LBS an additional parameter described by 3 dashes is put at the end of the list It serves as an indication that the bottom of the pa rameter list has been reached It can also be selected if no parameter at all should be as signed to a given display location Only numeric parameters can be assigned to the center line Some parameter combinations won t fit properly next to each other on the same display line because they take up too much space For example Vehicle Speed and Engine RPM can be assigned beside each other
11. around from 20 to 20 Parameter Maximum Speed is reset whenever this submenu is exit after selection via RBS leaving submenu via timeout or RBL will not reset Maximum Speed parameter If Maximum Speed is to be reset without changing the correction factor just enter this submenu menu and hit RBS right away to exit X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 24 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 3 Submenu Acceleration Settings Start and end speed settings for measuring the car e acceleration are selected within this submenu RBS Exit Submenu Functionality of buttons while in submenu Increment start or end speed setting by 5 km h 5 mph for speed units mph Increment start or end speed setting by 5 km h automatically 3 times per second Accept setting and move to next selection Exit submenu after last selection and reset parameter Maximum Acceleration Exit submenu without accepting any new speed settings and without resetting parameter Maximum Acceleration Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new speed settings and without resetting parameter Maximum Acceleration Having only 2 buttons available speed settings can be incremented but not decremented Setting for sta
12. ignition is ON and all non ECU parameters Time Date Battery Voltage Inside Temperature are shown correctly but data of all ECU pa rameters are not displayed X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved Make sure that the 3 wire PCB connector of the X Gauge that is located under the center console is correctly inserted Even if so re move the connector and reinsert it which will cause a factory reset of the X Gauge You can also cause a factory reset of the X Gauge by detaching the negative battery cable of the car for a few seconds and then reconnect it Be aware though that this may also reset your radio and you might have to re enter the security code of the radio If your car s horn is not working at the same time check Fuse 16 see your car s user manual Verify that none of the wires at the X Gauge module are broken off Verify that the flat cable of the display as sembly is securely seated in its connector Underneath your dash make sure that the two OBD wires of the K Gauge are inserted properly into the OBD connector shell and that this shell is seated correctly into the car s OBD socket If your car s radio is not working at the same time check Fuse 11 see your car s user manual Verify that none of the wires at the X Gauge module are broken off Push RBL which will enter Main Menu Wait until Main Menu exits itself by timeout
13. informational purposes only Accumulated numbers for timeout checksum and collision errors will be reset to zero when submenu is exit via RBS They will not be reset if submenu is exit via RBL X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 36 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 13 Submenu Clear Trouble Codes Diagnostic trouble codes that the ECU might have stored can be erased through this submenu RBS Exit Submenu Exit Submenu Functionality of buttons while in submenu Change setting between Yes and No not used Exit submenu without clearing any codes Accept Yes or No selection If No exit submenu if Yes start clearing codes Because clearing of diagnostic trouble codes requires that ignition is turned on this submenu selection does not appear while ignition is turned off Trouble codes can be cleared with engine running or stopped Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without clearing any codes Clearing of codes has to be confirmed by explicitly selecting Yes Clearing of trouble codes will start if Yes is selected and RBS gets pushed During the clearing process an animated clearing message is shown in the center line of the display After clearing completes successfully
14. mode that you use for daily driving That way no commu nications will take place over the OBD interface Why doesn t the X Gauge work in smart models before 2001 Gasoline Petrol or before 2004 Diesel The diagnostic interface in smart cars before model year 2001 Gasoline Petrol or be fore 2004 Diesel simply does not deliver the generic engine parameters that the X Gauge requests from the ECU This feature has been added to the ECU starting with model year 2001 2004 X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 42 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 012 How does the absolute intake pressure that the X Gauge displays relate to the actual turbo pressure boost Al2 The X Gauge displays ABSOLUTE intake pressure that the ECU reports from the en gine s MAP Manifold Absolute Pressure sensor All the ECU is interested in is absolute Pressure RELATIVE intake pressure boost or vacuum the one that you are rather inter ested in is given by Relative pressure boost or vacuum Absolute pressure Ambient pressure Ambient pressure is nominally I bar 14 5 psi at sea level The following examples assume an ambient pressure of 1 bar adjust for other heights above sea level 0 50 bar 0 50 bar vacuum 1 00 bar 0 00 bar neither vacuum nor boost 1 50 bar
15. set to mpg 2 Only available if Cool Down Time is greater than zero 3 Only available if ignition is turned on X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 20 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 Main Menu Pushing RBL in all display modes will enter the main menu display with two submenus shown in the bottom lines of the display Functionality of buttons while in main menu Scroll to next submenu Scroll through submenus automatically at a rate of 3 per second Enter submenu Exit Main Menu Notes Main menu is exit if neither RBS nor LBS are pushed within 10 seconds timeout When scrolling through submenus with LBS an indicator of 3 dashes is put after sub menu Factory Reset and before submenu Select Display Mode It s simply there as a sign that the bottom of the submenu list has been reached Having only 2 buttons available submenus can be scrolled up but not down X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 21 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 1 Submenu Mileage Settings Settings relevant for evaluation of current and average mileage are selected wit
16. timeout without performing a factory reset A factory reset has to be confirmed by explicitly selecting Yes The result of a factory reset is the same as if the continuous 12 Volt supply is removed temporarily form the X Gauge module either by removing reconnecting the module s 3 wire connector that is located under the center console or by disconnecting reconnecting the car s battery X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 38 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 9 Appendices 9 1 Default Settings after a Factory Reset All user programmed settings of the X Gauge will be lost if the continuous 12 Volt supply over the 3 wire cockpit clock connector gets interrupted or if the user has acknowledged a factory reset via submenu Factory Reset The table below lists the default settings that get loaded after power has been restored These settings are of course also active if the X Gauge is powered up for the first time after installation Menu Settings Depe Node Dees Wen sky Node Horne Wo Doky Node Veni No Dee meso eo oS X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 39 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info wel
17. 7 1 Ignition Off The display of the X Gauge stays dark while ignition is off Current consumption in this state is minimized and even less than the one from the original cockpit clock so battery drain is negligi ble The display below is shown while ignition is off under the following conditions While the driving lights are switched on and for another 30 seconds after the lights have been switched off After pushing either LBS or RBS for the duration of 30 seconds top line Date e center line Time seconds in small letters e bottom line right Inside Temperature Functionality of buttons while display is on Turn display off immediately if driving lights are switched off e not used Enter Main Menu Turn display off immediately if driving lights are switched off Note that this display will also be shown for 30 seconds after ignition has been turned off X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 11 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 7 2 Ignition On When ignition gets turned on the X Gauge will show one of 5 possible display modes which is either the same one that was active when ignition got turned off or the one that got selected in submenu Select Display Mode while ignition was off Changing from one display mode to another ca
18. 8 Copyright 2005 2014 Welte Engineering All rights reserved 23 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 2 Submenu Speed Correction This submenu facilitates the specification of a correction factor that gets applied to the vehicle speed value reported by the ECU This correction factor can be used for compensation of inherent measurement errors and or for adjustment to non standard wheel sizes Calibration might be car ried out with the help of a GPS unit Parameter Maximum Speed is also reset through this sub menu RBS Exit Submenu Functionality of buttons while in submenu Increment correction factor within 20 20 in steps of 1 Increment correction factor automatically 3 times per second Accept selected correction factor and exit submenu Reset parameter Maximum Speed Exit submenu without accepting any new correction factor and without resetting parameter Maximum Speed Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new correction factor and without resetting parameter Maximum Speed The specified correction factor will influence any speed derived parameters e g Mileage 0 Mileage Maximum Speed and Acceleration Having only 2 buttons available correction factor can be incremented but not decremented It will wrap
19. Display Mode Trouble Codes n een num 19 8 Meilensteine nenn E TON 20 8 1 Kifer UE 21 8 1 1 Submenu Mileage Settings sccscsscessecsscesesesacedessesceedess aetestessgeassdeastesses reeivis raais 22 LEE Submenu Speed SE 24 8 1 3 Submeni Acceleration Settings users 25 8 1 4 Submenu Turbo EE 26 8 1 3 Submenu Seleet Display M de uu euudenueannenennae eine 27 Ste Submenu Set TEE eege 29 ST Submenu Set Daten cansnisensunnnune anne mn inne 30 Salo Submenu Seleet E EE 31 81 9 Submenu Select EE 32 8 1 10 Submenu Select Greetins u sscssnanseneuienum Eeer 33 SEL Submenu Set Display IntensiWy u un sa ea ee 34 S112 Submenu View System INO rssicon odes een 35 8 1 13 Submenu Clear Trouble Codes ssszescciscccsssseasedeteusseiesey ea 37 8 5 14 Submenu Factory Reset susanne innen 38 9 erte e 39 9 1 Detault Settings alter a Factory Reset nun Eieg 39 9 2 TAQ E 41 9 3 Lroubleshootine u 4se uses een 44 X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 2 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 1 Important Safety Instructions Please read these warnings carefully before using the X Gauge As a driver it s your first priority to handle your vehicle in a safe manner and to pay con stant attention to the traffic situations around you Be aware of the fact
20. ECU Parameters Parameters in this category are retrieved from the ECU over the car s OBD interface in a request reply fashion A request reply cycle takes approximately 180 ms per parameter If for instance a display mode is set up with 4 ECU parameters they will be repeatedly retrieved about every 720 ms if 7 ECU parameters are assigned to a display mode they will be retrieved about every 1 3 seconds Note that these parameters are displayed by the K Gauge as delivered by the ECU without any post processing such as averaging and that the accuracy of these parameters is solely determined by the ECU and its connected sensors of Trouble Codes Shows the total number of confirmed diagnostic trouble codes DTC stored by the ECU Fuel System Closed failed Operation status of the fuel delivery control system Open failed Open Closed Open cold Engine Load 0 100 Percentage of peak available torque Coolant Temp 40 215 C Engine coolant temperature derived from engine coolant 40 419 F temperature sensor Short Term Fuel Trim t 100 0 99 2 Correction being used by the closed loop fuel algorithm If fuel system is open loop 0 correction should be reported Long Term Fuel Trim t 100 0 99 2 Correction being used by the fuel control system in both open and closed loop modes of operation Intake Absolute Pressure 0 00 2 55 bar Absolute intake pressure derived from the manifold absolute 0 0 36 9 psi pressur
21. Welte Engineering Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch For the smart fortwo gasoline petrol 2001 to 2006 For the smart fortwo cdi diesel 2004 to 2006 User Manual X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 1 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Table of contents 1 Important Safety ee Skeive renea e R E a aE 3 2 Kn 3 3 Limited Warr lty asassenisnnkieiamen inankannkalaheinineineke 3 4 Definitions of Terms u u 44a ine 4 2 eet Lee D EE 4 6 atures and Ee E 5 6 1 Non ECU EE 5 6 2 Se RENE 6 6 3 Calcul ted Parameters u u i8 Renee aan 7 6 4 Titel aneren eege EE 8 6 5 Diasnostie e begleede Ee H 6 6 ET H 6 7 Ee einen au 9 6 8 Display enee eege eene a H 6 9 Module Specifieatlons a u 0 8e nennen 10 7 Operaton asien 10 Ted Temi thom ON SET 11 N Tomy OM On ee sic cases wave cass uct essvests eats Sfswtssvssd tenes lucsenevasiacausstivecaswtt Tet ssduecesesusuiess E 12 7 2 1 Display ee 12 Pda Display Mode Matti veisccstissscssesessscacosasctesasssiaedivaiaceeinanionsesabcsasaysetasdsealesueeeasccaeavaiceveveecusys 13 P23 Display Mode Vext sesssccsscossceacssiaredsesasseatavesaeteseasietusena na 15 LA Display Mode E 16 72 3
22. ate of one code per 5 seconds A small number displayed to the right of the trouble code indicates the sequence number of the currently displayed code For instance if the ECU has stored 2 trouble codes then the two codes will be displayed one after another with corresponding sequence numbers 1 and 2 Origin of trouble code bottom line left can either be Powertrain Body Chassis Net work A code can either be a standardized one according to SAE J2012 or it can be specific to the manufacturer of the car when bottom line right shows Manufacturer Specific More information regarding SAE J2012 codes can be found on the Internet for instance under http www troublecodes net OBD2 or http www obdii com dtcanatomy html Do not contact Welte Engineering for interpretation of trouble codes that your car s ECU has recorded Since we won t be able to help with such questions you should have your car inspected at a smart dealership X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 19 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 Menu Numerous features of the KX Gauge are determined by settings through the user menu The chart below shows how this menu is organized Sumenu soets Possess O nanan age Sets Coren oo o oo asne 1 roem O 1 Only available if Mileage units are
23. but it does not make much sense to do so since they would overlap Mileage parameters that are selected to be displayed in 1 100km will only show their full unit string l 100km when displayed in the center line The unit string will be abbreviated to T liters when a mileage parameter is assigned to the top or bottom lines in order to prevent overlapping with neighboring parameters X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 14 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 7 2 3 Display Mode Text This display mode is limited to showing 4 parameters concurrently but it does not only show the parameter values but also their descriptions Parameter assignment as shown below is just an ex ample line 1 Intake Absolute Pressure line 2 Engine Load line 3 Coolant Temperature line 4 Fuel System Functionality of buttons while in this display mode Change parameter assignment at selected display line Change display mode to Graphic Select display line for changing parameter assignment Enter Main Menu Changing Parameter Assignment Hitting RBS repeatedly will move the display line for changing parameter assignment sequen tially from line 1 to line 4 with the parameter description of the currently selected line high lighted The picture sequence bel
24. crement ambient pressure or cool down time automatically 3 times per second Accept setting and move to next selection Exit submenu after last selection Exit submenu without accepting any new settings Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new settings Having only 2 buttons available ambient pressure and cool down time settings can be incremented but not decremented Ambient pressure will wrap around from 1 20 bar to 0 00 bar 18 0 psi to 0 0 psi and cool down time will wrap around from 240 s to 0 s Shown at setting will only appear if cool down time is set above zero It determines the parameter where cool down time will be shown when vehicle speed has reached zero This setting can be either one of the three parameters Vehicle Speed Mileage or Mileage The display of cool down time is disabled if cool down time is set to zero Setting for ambient pressure can be used for converting the absolute pressure value that is reported by the ECU into a relative pressure value that is interpreted as boost for positive values and vacuum for negative values according to Relative pressure boost or vacuum Absolute pressure Ambient pressure Ambient pressure is nominally 1 0 bar 14 5 psi at sea level However it is very important to understand that ambient pressure is a fluctuating value It is dependent on altitude tem perature and weather condition
25. e MAP sensor Note Relative pressure Boost or Vacuum absolute pressure ambient pressure Ambient pressure is nominally 1 bar 14 5 psi at sea level Engine RPM 0 16384 rpm Engine revolutions per minute Vehicle Speed 0 255 km h Vehicle road speed a correction factor can be specified in 0 158 mph order to compensate for error and or different wheel sizes Ignition Timing Advance t 64 0 63 5 Ignition timing advance for 1 cylinder not including me chanical advance Intake Air Temp 40 215 C Intake manifold air temperature 40 419 F Air Flow Rate t 0 0 655 4 g s Airflow rate measured by the mass airflow sensor 0 00 86 70 Ib min Absolute Throttle Position t 100 Absolute throttle position Usually above 0 at idle Secondary Air Status t Status of secondary source of air into the exhaust in order to E Ups burn remaining fuel before entering the catalytic converter Downstream Dns Oxygen Sensor 1 Voltage t 0 000 1 275 V Voltage from oxygen sensor located ahead of catalytic con verter Higher values reflect amore rich mixture lower values reflect a more lean mixture Oxygen Sensor 2 Voltage t 0 000 1 275 V Voltage from oxygen sensor located behind catalytic con verter X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 6 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Informati
26. e User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 7 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch rameter Maximum Speed gets selected so it does not have to be selected explicitly If at least one of the parameters that depend on vehicle speed Vehicle Speed Mileage Mileage Acceleration or Maximum Acceleration is assigned to a display mode then parameter Maximum Speed will be updated even without it being explicitly assigned to the display mode Maximum vehicle speed can be reset via menu selection Acceleration measurement is based on time and ECU parameter Vehicle Speed Be aware that the accuracy of such measurements is limited by the request reply cycle time for retrieving ECU pa rameters and the display update rate In order to keep measurement error minimal fastest request reply cycle time make sure that Vehicle Speed is the only ECU parameter that is assigned to the active display mode Note that selection of parameter Acceleration will implicitly assign ECU parameter Vehicle Speed to a display mode so it does not necessarily have to be selected explic itly Start and end speed settings for these measurements are entered via menu selection as is ex plained later on Parameter Maximum Acceleration keeps track of the minimal achieved acceleration time It can be reset via the user menu The
27. ector gets reconnected after the mechanic has finished his diagnosis otherwise your X Gauge won t work properly anymore There is a blinking dot in the top right corner of my X Gauge What is it for The top right pixel of the display is used as an indicator that is lit sometimes flashing whenever parameters are retrieved from the ECU It stays dark when no data between the X Gauge and the ECU is being exchanged e g all assigned parameters of the active display mode are non ECU parameters Can I modify any engine parameters with the X Gauge No The X Gauge is a monitoring device only Since a car s OBD interface is actually intended for temporary hookup of diagnostic equipment is it safe to have the X Gauge connected continuously So far we have driven our test smart with a connected X Gauge for over 50 000 km with continuously monitoring various ECU parameters and we have not encountered any problems whatsoever The additional processing load that the K Gauge puts onto the car s ECU is insignificant as compared to the ECU s main processing tasks Common en gineering sense would also suggests that if the ECU would run into a processing bottle neck due to an OBD request from the X Gauge that this request would simply be ig nored Besides there are commercial OBD logging devices available which also stay connected to the interface continuously If you are still concerned just assign all non ECU parameters to the display
28. eering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 1 2 5 Display Mode Trouble Codes This display mode will retrieve diagnostic trouble codes from the ECU if any are stored Stored trouble codes are either confirmed codes or pending codes Confirmed codes indicate serious problems that the ECU has detected over 2 driving cycles driving cycle start engine drive stop engine Confirmed codes will also turn on the check engine light in the lower right corner of your instrument panel Pending codes indicate problems that the ECU has detected during the current or last driving cycle and are not considered serious yet so pending codes will not turn on the check engine light A pending code will turn into a confirmed one if it has been detected over more than 1 driving cycle The X Gauge continuously displays confirmed and pending codes alternatively e top line Total number of stored confirmed or pend ing trouble codes e center line Trouble Code retrieved sequence number in small letters e bottom line left Origin of trouble code e bottom line right Standardized or manufacturer specific code Functionality of buttons while in this display mode gogg not used Change display mode to Time not used Enter Main Menu Notes Center line will show a dash if no trouble codes are stored Trouble codes are shown repeatedly at a r
29. eter at all should be as signed to a given display line Mileage parameters that are selected to be displayed in 100km will be shown with an abbreviated unit string I liters in order to save space 7 2 4 Display Mode Graphic This display mode shows the history of up to 2 numeric parameters plotted in x y graphs Points are drawn from left to right until the right hand side of the display is reached The graphs then start scrolling from right to left as new points are drawn Current values of the parameters being plotted are shown in the top line of the display with the left and right values belonging to graph 1 and 2 respectively Graph 2 is plotted with less intensity than graph 1 so that they are more easily distinguishable An ON Off selector is located in the center of the top line between the parameter values Graphing can be enabled or disabled by setting this selector accordingly Parameter assignment as shown below is just an example on how the display might look like when plotting voltages of the two oxygen sensors while fuel system is in closed mode e graph 1 Oxygen Sensor I Voltage ahead of catalyst e graph 2 Oxygen Sensor 2 Voltage behind catalyst Functionality of buttons while in this display mode 3 Change parameter assignment of selected graph or change On Off selector Change display mode to Trouble Codes Select graph for changing parameter assignment or select On Off selector gG
30. he ECU if the check engine symbol in the lower right corner of your instrument panel lights up un expectedly while the engine is running Remember that it is normal for this symbol to light up when the ignition gets turned on and to go out about 10 seconds after the engine got started Trouble codes can be retrieved and displayed within a dedicated display mode and they can be cleared from the ECU via a special menu selection The X Gauge displays the actual trouble codes only without interpreting them so it won t tell the actual cause for triggering a particular code While some codes are standardized according to SAE J2012 others are manufacturer spe cific You can also search the Internet for more information There are numerous sites in the worldwide web that carry lists for trouble code interpretation You can try http www troublecodes net OBD2 or http www obdii com dtcanatomy html 6 6 Languages The language of parameter descriptions and menu selections can be chosen to be English German French Italian Spanish 6 7 Units Metric or English units can be selected for displaying numeric parameters Cor F for temperature bar or psi for pressure g s or lb min for air flow km h or mph for speed 1 100km or mpg for mileage Note that metric and English units can be mixed While for instance temperature is chosen to be displayed in C pressure can be selected to be shown in psi
31. hin this submenu RBS Exit Submenu Functionality of buttons while in submenu Increment correction factor within 50 100 in steps of 2 Change setting for gallon US UK Increment correction factor automatically 3 times per second Accept setting and move to next selection Exit submenu after last selection AND reset pa rameter Mileage Exit submenu without accepting any new settings and without resetting parameter Mileage Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new settings and without resetting parameter Mileage Selection for Gallon will NOT appear if mileage units are set to 1 100km Having only 2 buttons available correction factor can be incremented but not decremented It will wrap around from 100 to 50 Average mileage Mileage is reset when this submenu is exit after last selection via RBS leaving submenu via timeout or RBL will not reset average mileage If Mileage is to be reset without changing any submenu settings enter this submenu menu and hit RBS re peatedly until submenu is exit Correction factor can be used for calibration of current and average mileage evaluations ac cording to the following procedure 7 GOOG Make sure that you have first verified and possibly corrected the accuracy of the Vehicle Speed parameter of the X Gauge For details see the description of submenu Speed Correction
32. n be done by pushing LBL which switches them sequentially Time Main Text Graphic Trouble Codes Time or directly through sub menu Select Display Mode 7 2 1 Display Mode Time This display mode shows all non ECU parameters which means that no communications whatso ever with the car s ECU are taking place top line Date center line Time seconds in small letters bottom line left Battery Voltage bottom line right Inside Temperature Functionality of buttons while in this display mode not used Change display mode to Main not used Enter Main Menu X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 12 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 7 2 2 Display Mode Main Up to 7 parameters can be displayed concurrently in this display mode Which parameter is dis played at which display location is freely selectable Top and bottom lines can have up to 3 pa rameters assigned while the center line can show one parameter in large letters The idea here is of course that the parameter which matters most to the driver is placed into the display center while other less important ones are placed into the top and bottom lines Parameter assignment as shown below is just an example top line left Fuel System top line center Average Fuel Co
33. ne that has been set in this submenu If ambient pressure in this submenu is set to 0 0 bar 0 0 psi then parameter Intake Pres sure will always display the absolute pressure without consideration of actual ambient pressure 8 1 5 Submenu Select Display Mode As described previously display modes can be changed from one mode to the next by pushing LBL while in a display mode Alternatively a certain display mode can be chosen directly through this submenu Additionally this submenu lets the user choose if the display is shown in normal or inverse type and if the display should be flipped horizontally and or vertically RBS RBS gt Exit Submenu Functionality of buttons while in submenu Advance to next display mode select between normal and inverse type or change horizontal vertical flip settings between Yes and No Advance to next display setting automatically at a rate of 3 per second Accept setting and move to next selection Exit submenu after last selection Exit submenu without accepting any new settings gogg X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 27 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new display mode settings
34. nsumption 100km top line right Coolant Temperature center line Intake Absolute Pressure bottom line left Battery Voltage bottom line center Time hours and minutes bottom line right Inside Temperature Functionality of buttons while in this display mode Change parameter assignment at selected display location e Change display mode to Text Select display location for changing parameter assignment Enter Main Menu Having that many parameters shown concurrently does not leave any room for also showing the parameter descriptions so the user must remember his assignments In the display example shown above he must recall for instance that the temperature value as shown at the top line right location displays coolant temperature and not intake air temperature Changing Parameter Assignment Hitting RBS repeatedly will move the display location for changing parameter assignment se quentially from top line left to bottom line right A highlighted description of the assigned pa rameter is shown at the currently selected display location The picture sequence below shows how the display may look like if RBS is hit repeatedly for the display example shown above X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 13 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Once
35. of buttons while in submenu iss not used not used Display next selection Exit submenu after last selection Exit submenu Details Notes X Gauge S N X Gauge HWV X Gauge SWV Vdd Display Vcc MCU Clock MCU Timeout Errors Checksum Errors Collision Errors ECU OBD ECU HW ECU SWi Key Bytes PID 01 20 PID 21 40 PID 41 60 Serial number of K Gauge module Hardware version of K Gauge module Software version of K Gauge module Supply voltage provided to display of X Gauge module Supply voltage provided to micro controller of X Gauge module Clock frequency of micro controller Accumulated timeout errors that occurred on OBD link Accumulated checksum errors that occurred on OBD link Accumulated collision errors that occurred on OBD link OBD requirements that the vehicle meets reported by ECU Hardware number reported by ECU Software number reported by ECU Key Bytes reported by ECU Encoded parameter identifications from 1 through 32 that the ECU sup ports according to SAE J2178 Encoded parameter identifications from 33 through 64 that the ECU supports according to SAE J2178 Encoded parameter identifications from 65 through 96 that the ECU supports according to SAE J2178 Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without resetting accumulated timeout checksum and collision errors All data presented in this submenu is intended for
36. on info welte engineering ch ABS Front L t 0 1500 pps Pulse rate from ABS sensor of left front wheel ABS Front R t 0 1500 pps Pulse rate from ABS sensor of right front wheel ABS Rear Lt 0 1500 pps Pulse rate from ABS sensor of left rear wheel ABS Rear Rt 0 1500 pps Pulse rate from ABS sensor of right rear wheel R N 1 2 3 4 5 6 Selected gear position in manual and auto mode Gearbox Temp t 40 215 C Gearbox temperature 40 419 F Note that Welte Engineering is not in a position to advise you if some particular ECU parameter of your smart car is behaving in a correct manner or not Please do not contact us with any questions in this regard If you are suspecting that your engine is malfunctioning bring your car to a smart dealership 6 3 Calculated Parameters Parameters in this category are derived from one or more of the engine s ECU parameters Mileage 0 0 200 1 100 km Current fuel consumption 0 0 999 mpg Mileage 0 0 200 1 100 km Average fuel consumption 0 0 999 mpg Maximum Speed 0 255 km h Tracking of maximum vehicle road speed 0 158 mph Acceleration 0 0 100 0 s Acceleration time measured between arbitrary start and end speed settings based on vehicle speed reported by ECU Error 0 400 ms Maximum Acceleration 0 0 100 0 s Tracking of minimum acceleration time Turbo Cool Down Time 240 0s Count down timer that starts whenever vehicle speed retu
37. or with cars made by other manufactures that feature an OBD connector The hardware as well as the software of the K Gauge was explicitly developed for the fortwo The K Gauge will however also work in the smart roadster since it shares its engine and ECU with the fortwo But a solution for housing and wiring of the X Gauge in a smart roadster is not readily available as it is with the cockpit clock in the fortwo Regarding any other car it would be pure coincidence if its ECU would respond correctly to the X Gauge Can the X Gauge be ordered together with the housing of the cockpit clock No the K Gauge can only be delivered as a kit You must provide the cockpit clock yourselves If your smart is not already equipped with one you Il either have to buy one from a smart dealer or if your lucky you might be able to get one from a salvage yard Only the plain case the two plastic button plugs the plastic screen the decorative color ring and the 3 mounting screws are actually needed Can the X Gauge be installed by the average do it yourselfer Lets put it this way if you re able to change the bulbs of your smart s driving lights yourselves you re probably capable of installing an X Gauge Seriously read through the entire installation guide in order to get a feeling for doing the job yourself If you do not feel comfortable with any of the required procedures you should have someone quali fied do the job for you
38. or if it fails for some reason the display will show Codes cleared or Codes NOT cleared respectively for the duration of 2 seconds before submenu is exit Even if clearing has been confirmed with Codes cleared trouble codes will still be displayed by the X Gauge until ignition is turned off and then on again the same is true for the check engine symbol in the lower right corner of your instrument panel Be aware that selecting Yes will not only erase the trouble codes but will in fact also clear other diagnostic data that the ECU might have recorded but can not be read out by the X Gauge X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 37 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 14 Submenu Factory Reset A factory reset of the K Gauge can be initiated through this submenu whenever all user pro grammable settings should be set back to their default values RBS Exit Submenu RBS Perform Factory Reset Functionality of buttons while in submenu Change setting between Yes and No not used Accept Yes or No selection If No exit submenu if Yes perform factory reset Exit submenu without performing a factory reset gogg Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds
39. ow shows how the display may look like if RBS is hit repeatedly for the display example shown above RBS RBS Once a desired display line is reached hitting LBS repeatedly will cycle through the available parameters according to the tables shown in chapters 6 1 6 2 and 6 3 If the desired parameter is reached RBS can be pushed again for moving to the next display line If neither RBS nor LBS are pushed within 4 seconds parameter assignment gets finalized and highlighting of the cur rently selected line is turned off X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 15 45 RBS Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch Notes Parameter assignment is saved even if display mode is changed or ignition gets turned off Display line that was selected last by RBS is saved also For instance if display line 2 was selected last LBS can be pushed at any time for changing the parameter displayed at line 2 Initial RBS will highlight the current display line without changing it Subsequent RBS will advance display line sequentially When cycling through the parameters with LBS an additional parameter described by 3 dashes is put at the end of the list It serves as an indication that the bottom of the pa rameter list has been reached It can also be selected if no param
40. purchase in the form of a bill of sale or receipted invoice which is evidence that the product is within the warranty period must be provided to obtain warranty service What the warranty does not cover Any defects due to incorrect installation Defects caused by exceeding the modules operating limits e g over voltage Damage from misuse or neglect Modules that have been modified or incorporated into other products Acts of nature such as but not limited to lightning damage Limitation of warranty THE WARRANTY STATED ABOVE IS THE ONLY WARRANTY APPLICABLE TO THIS PRODUCT ANY DAMAGE CAUSED TO A CAR BY INCORRECT INSTALLMENT IS NOT A WARRANTABLE CLAIM WELTE ENGINEERING SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSE QUENTIAL DAMAGES RESULTING FROM THE USE OF THIS PRODUCT X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 3 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 4 Definitions of Terms These abbreviations will be used in the following description ECU Electronic Control Unit OBD On Board Diagnostics DTC Diagnostic Trouble Code SAE Society of Automotive Engineers 5 Introduction The X Gauge is a sophisticated electronic module with a 128x64 pixel graphic display that re places the original module inside the cockpit clock of a smart fortwo city co
41. re pushed within 10 seconds timeout without accepting any new language setting X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 32 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 10 Submenu Select Greeting By default the X Gauge shows a greeting display sequence every time ignition gets turned on This submenu allows changing the greeting sequence from its default setting standard length to a shorter sequence or no greeting at all RBS Exit Submenu Functionality of buttons while in submenu Change greeting length Standard Short None Change between greeting lengths automatically 3 times per second Accept selected greeting length and exit submenu Exit submenu without accepting any new greeting setting GL Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new greeting setting X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 33 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 11 Submenu Set Display Intensity The display s intensity for day and night driving can be adjusted in this submenu from level 1 to 10 Day intensity i
42. rns to 0 km h or 0 mpg For gasoline engines current and average mileage fuel consumption is estimated from ECU pa rameters Air Flow Rate Long Term Fuel Trim and Vehicle Speed For diesel engines it is esti mated from ECU parameters Engine Load and Vehicle Speed The selection of parameters Mile age current and Mileage average will implicitly assign the needed ECU parameters to the selected display mode Parameter Mileage can be reset via the user menu Menu selections al low defining measurement units 1 100km or mpg and gallon type US or UK to use for meas urements in mpg Mileage parameters are displayed with one decimal digit resolution for values below 100 1 100km or 100 mpg Values equal or above this threshold are displayed without a decimal digit Note that mileage can only be evaluated while the car is in motion speed above 0 The display of Mileage will show a dash instead of a numeric value whenever the car is stopped Accuracy of mileage evaluation will degrade if the car is driven in lots of stop and go traffic be cause fuel consumed during idle time can not be taken into account Note that average mileage gets only updated if at least one of the two parameters Mileage or Mileage is assigned to the active display mode Maximum vehicle speed is tracked based on ECU parameter Vehicle Speed and can be reset via the user menu ECU parameter Vehicle Speed will be implicitly assigned to a display mode if pa X Gaug
43. rt speed can be selected within 0 195 km h 0 120 mph Setting for end speed can be selected within start speed 5 km h 200 km h start speed 5 mph 125 mph The value of parameter Maximum Acceleration will be reset if this submenu is exit via RBS If Maximum Acceleration shall be reset without changing start and end speed settings simply push RBS twice after having entered this submenu Be aware that the error of an acceleration measurement can be anywhere from 0 0 4 sec onds due to ECU request reply time and display update rate The maximum error of 0 4 seconds can be even larger if any other ECU parameter next to Vehicle Speed is assigned to the active display mode Selection of parameter Acceleration will implicitly assign ECU parameter Vehicle Speed so it does not necessarily have to be selected explicitly X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 25 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 4 Turbo Submenu Turbo Settings related settings are defined within this submenu RBS gt Exit Submenu Functionality of buttons while in submenu SPP Increment ambient pressure by 0 05 bar 0 5 psi for pressure units psi increment cool down time by 5 seconds or change shown at parameter for displaying cool down time In
44. s active while the driving lights of the car are turned off night intensity when the lights are turned on RBS Exit Submenu Functionality of buttons while in submenu Increment intensity setting for day or night Increment intensity setting for day or night automatically 3 times per second Accept setting and move to next selection Exit submenu after last selection Exit submenu without accepting any new intensity settings Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new intensity settings Having only 2 buttons available intensity settings can be incremented but not decre mented They will wrap around from 10 to 1 X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 34 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 12 Submenu View System Info This submenu presents some status information of the X Gauge system E RBS RBS RBS RBS RBS RBS RBS next page X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 35 45 from previous page RBS Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch RBS Exit Submenu Functionality
45. s in general For a given altitude it can change from day to day or even from hour to hour For instance if ambient pressure at sea level is 1 0 bar and temperature is a constant 15 degrees Celsius ambient pressure will be down at 0 89 bar when an altitude of 1000 meters is reached So if one would set the X Gauge s ambient pressure value to 1 00 bar at sea level and the ECU would report an absolute pressure value of 0 95 bar at sea level as well as at 1000 meters then the X Gauge would always display a relative pressure of 0 05 bar At 1000 meters however the correct relative pressure would be 0 06 bar since ambient pressure is 0 89 bar at this altitude Assuming constant absolute pressure vacuum has changed into boost by driving from sea level to an altitude of 1000 meters But the X Gauge can not display this difference correctly because it has X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 26 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch no information about any changes in ambient pressure Unfortunately the smart engine does not have an ambient pressure sensor If you decide to set ambient pressure in this submenu to a value other than zero you must be aware that your displayed relative pressure will only be accurate as long as the actual ambient pressure is exactly the same as the o
46. te engineering ch Parameter Assignments for display mode Main Display Location After Factory Reset After Factory Reset Gasoline Petrol Engine Diesel Engine Top Line Left Fuel System Engine Load Top Line Center G Mileage Intake Air Temperature Top Line Right Coolant Temperature Coolant Temperature Active display location for changing parameter assignment Top Line Left Parameter Assignments for display mode Text Gasoline Petrol Engine Diesel Engine Active display line for changing parameter assignment Line 1 Parameter Assignments for display mode Graphic Display Location After Factory Reset After Factory Reset Gasoline Petrol Engine Diesel Engine Graph 1 Oxygen Sensor 1 Voltage Engine Load Graph 1 Oxygen Sensor 2 Voltage Intake Absolute Pressure Active display location for changing parameter assignment Graph 1 X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 40 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 9 2 FAQ This chapter is a compilation of frequently asked K Gauge related questions and their answers You ll always find an up to date version on our website QI Al 02 A2 Q3 A3 04 A4 05 AS 06 A6 Besides the fortwo will the X Gauge also work with other cars made by smart
47. that the real time display behavior of the X Gauge can be highly distractive to a driver Never adjust the gauge s display mode or any of its menu settings while you are driving your car Because the X Gauge displays a lot of information about the performance of your smart engine it s easy to recognize when some engine parameter starts to behave abnormally The X Gauge further helps in diagnosing engine problems due to its capability for re trieving trouble codes from the ECU However keep in mind that these features do not permit any deviations from the scheduled maintenance intervals for your car that are set for by the manufacturer 2 Disclaimer The information contained in this document is subject to change and does not represent a com mitment on the part of the copyright holder While the information contained herein is assumed to be accurate Welte Engineering assumes no responsibility for any errors or omissions In no event shall Welte Engineering be liable for special direct indirect or consequential damage losses costs charges claims demands or expenses of any nature or kind 3 Limited Warranty The X Gauge module is warranted against defects in materials or workmanship for the duration of one year from the date of purchase Welte Engineering will at our option either repair or pro vide a new unit The repaired or exchanged unit is under warranty for the remainder of the origi nal product s warranty Proof of
48. thout changing it Subsequent RBS will advance display location sequentially Graphs are kept in memory when On Off selector is turned to Off even if display mode is changed or ignition gets turned off so that graphs can be redisplayed at a later time On Off selector is always shown in the English language because other languages would take up too much display space When cycling through the parameters with LBS an additional parameter described by 3 dashes is put at the end of the list It serves as an indication that the bottom of the pa rameter list has been reached It can also be selected if a graph should not be drawn Mileage parameters that are selected to be displayed in 100km will be shown with an abbreviated unit string 1 liters in order to save space If a graph is assigned to a mileage parameter display scrolling will be interrupted whenever the car is stopped since mileage is not defined when speed is equal to zero Y axis scaling is done according to the expected range of parameter values for the smart engine as is shown in the following table X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 17 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 18 45 Welte Engin
49. turbo cool down timer is intended as a reminder that a hot engine should be kept running for some time before turning it off When an engine runs at maximum power high torque the turbo charger is operating at very high temperatures and speeds Hot shut down can cause reduced ser vice life which is avoidable by a minute or two of idling The turbo cool down timer of the X Gauge starts counting seconds down from a user defined set value whenever vehicle speed re turns to zero This count down timer can be set from 0 240 seconds and the user can select to display its time in either one of the three parameters Vehicle Speed Mileage or Mileage While the timer is running the selected parameter changes from its regular display to the cool down time Once the timer has elapsed or if speed gets above zero the regular display of the parameter will return 6 4 Display Modes The user can choose from 5 distinct display modes for displaying the parameters described in the above tables X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 8 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 6 5 Diagnostic Trouble Codes The X Gauge is capable of retrieving confirmed as well as pending diagnostic trouble codes DTCs from the ECU One or more confirmed trouble codes will most likely be recorded by t
50. up perfectly It can not only tell time but also date battery voltage inside temperature and a number of engine parameters in real time These parameters are retrieved from the car s engine control unit ECU through the on board diagnostics OBD interface connector The module can also display and clear engine trouble codes that the ECU might have stored Note that the X Gauge will only work in the following cars smart fortwo 2001 to 2006 with gasoline petrol engine smart fortwo cdi 2004 to 2006 with diesel engine smart roadster all models These model limitations are due to the fact that the diagnostic interface in earlier models does not deliver the generic engine parameters that the K Gauge requests from the ECU while models after 2006 have a CAN based diagnostic interface implemented that the X Gauge is not com patible with An X Gauge made for the gasoline petrol engine fortwo or roadster will not work in a fortwo cdi and vice versa At present the X Gauge is deliverable in kit form only which means that your smart must be equipped with the original cockpit clock Latest versions of this User Manual and the accompanying Installation Guide are available for downloading from our website X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 4 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info
51. urs and minutes can be incremented but not decre mented Time is updated with newly set hour and minute and with seconds cleared to 0 at the mo ment when submenu is exit RBS pushed after having set minutes X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 29 45 Welte Engineering Chappelihof 18 CH 8863 Buttikon Switzerland Web www welte engineering ch Information info welte engineering ch 8 1 7 Submenu Set Date This submenu for setting actual date consists of 3 selections as show below RBS RBS RBS Exit Submenu Functionality of buttons while in submenu Increment setting for year month or day Increment setting for year month or day automatically 3 times per second Accept setting and move to next selection Exit submenu after last selection Exit submenu without accepting any new date settings GU Notes Submenu is exit if neither RBS nor LBS are pushed within 10 seconds timeout without accepting any new date settings Having only 2 buttons available years months and days can be incremented but not decre mented Maximum year setting is limited to 2040 after which it will wrap back to 2005 Date is updated with newly set year month and day at the moment when submenu is exit RBS pushed after having set day X Gauge User Manual Version 1 78 Copyright 2005 2014 Welte Engineering All rights reserved 30 45 Welte

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