TVR Speed Six diagnostic software
Contents
1. BLACK the signal OIL PRESSURE Oil pressure is measured from the oil pressure sensor mounted on the inner wing under the air box The output from the oil pressure sensor is used to turn on the oil pressure warning light at low pressures at low RPMs and at higher pressures at higher RPMs If the wire from the sensor to the ecu is disconnected or broken the pressure reading shown will be approx 130 psi and the warning light will be PERMANENTLY off If the wire from the sensor to the ecu is shorted to ground the pressure reading will be approx 150 psi and the warning light will be PERMANENTLY off EE Hi is User Manual software for Speed Six engine 5 12 OUTPUTS FUEL 1 amp FUEL 2 Fuel injection time is displayed for each bank When water temp gt 80 C at idle it should be between 2 2 amp 2 4 ms Higher readings than this could indicate misfiring due to fouled plugs incorrectly balanced throttle assemblies or faulty lambda sensor readings Check primary exhaust pipe temperatures to detect poorly running cylinders a chinagraph pencil touched on the exhaust manifold 1 inch from the port face works well and check cylinder airflow with syncrometer to detect poor balance If all cylinders are running correctly check lambda sensors as above replace if faulty Ifa cylinder is still not running properly disconnect the suspect injector and connect the injector circuit tester Start the engine and run for A FEW SECONDS ONLY If the inject2. ones that have been detected in the past and may or may not still be present NOTE FAULTS WILL BE LOGGED IF ANY SENSOR WIRES ARE DISCONNECTED WHILST THE IGNITION IS TURNED ON Current faults will turn the MIL lamp on Logged faults will not Observing the logged faults can be useful when tracing intermittent faults Logged faults can be removed by using the ECU Tools menu or by connecting the fault code diagnostic box to the diagnostic plug adjacent to the ECU connector turning the immobiliser off and the ignition on Then press and hold the black button on the diagnostic box for at least three seconds THROTTLE 1 or 2 FLT These faults are shown if the throttle pot readings are out of range Throttle 1 is for set 1 cylinders 123 throttle 2 is for set 2 cylinders 456 If a fault is detected on one set then that input signal will be ignored and both banks will be run using the good throttle pot signal from the other set The MIL lamp will be turned on Throttle pot faults can be caused by 1 Water ingress into throttle pot its connector or wiring usually due to the use of a power washer 2 Corrosion on throttle pot connectors only use TVR gold plated connectors and throttle pots EE Hi is User Manual software for Speed Six engine 7 12 3 Mechanical damage to pot or wiring 4 Throttle pot worn or noisy WHEN A THROTTLE POTENTIOMETER IS REPLACED IT MUST BE SEALED ONTO THE THROTTLE BODY USING A SMALL AM
3. rpm will be highlighted in blue This line is shown by the blue graph the red graph shows the previous speed line the green graph shows the next speed line Ideally these lines should stay roughly horizontal and close to 0 If values are high gt 20 or erratic suspect excessive purging worn erratic throttle pots leaks in exhaust intake manifolds faulty lambda sensors or incorrect fuel pressure see real time help for fault screen If you wish to save an adaptive map that you have uploaded click on File then on Save Map to Disk Click on the filename box and type in your chosen filename followed by map e g map map You can view a map that has been saved at a later date without the ECU connected To do this click on File then on Load Map From Disk next click on the file name you wish to view then on the OK box The map will now be displayed as before
4. to measure whether combustion was rich or lean When in a rich gas the lambda sensor will read approx 1 1 5V provided it has warmed up When in a lean gas it will read approx OV If it was rich the ECU reduces the amount of fuel to be injected at the particular speed and load that the engine was at when the exhaust gas being measured was created If the mixture was lean the ECU would increase the amount of fuel to be injected This adjustment is remembered as an adaptive value There are many adaptive values created for all combinations of speed and load Thus the ECU retunes the engine throughout its life to maintain optimum performance Before lambda control can begin the lambda sensors must be allowed to warm up This is shown in the warm up timer box and should last for approx 30 seconds The engine temp must also be high enough to maintain combustion at an AFR of 14 6 1 This is shown by the water temp box In order to accelerate cleanly without missing a richer mixture is required This is provided when rate of change of throttle position THROTTLE is detected So close loop control is suspended whilst THROTTLE is present Very rapid changes in engine speed make reliable closed loop control impossible so it is also suspended under these conditions as shown in the dSPEED box When running correctly the lambda voltages should switch between 0 amp 1 1 5V approx When under light load these voltages will stay predominantly l
5. 1 Faulty alternator causing over or under charging 2 Faulty battery 3 Poor earths from ECU to battery 4 Poor power feed to ECU from battery EE Hi is User Manual software for Speed Six engine 8 12 LAMBDA 1 amp LAMBDA 2 These faults are shown if the lambda sensor signal rises above 1 7V If it occurs the MIL lamp will be turned on Correct operation of the lambda sensors is best checked by viewing the real time logging screen The sensor signal should alternate between 0 V and 1 1 5 V and never stay at a mid voltage 0 4 0 7V position Lambda is the front set of cylinders ie 1 2 amp 3 and lambda 2 is the rear set ie 4 5 amp 6 Lambda fault can be caused by 1 Water ingress into the lambda sensor s connector or wiring 2 Mechanical damage to sensor or wiring causing a short between the supply and signal wires 3 Faulty sensor AFR 123 amp 456 FLT These faults are shown if the adaptive values have reached their limits for CYL123 or CYL456 i e the system has attempted to adjust the mixture by an excessive amount If either occur the MIL lamp will be turned on AFR fault can be caused by 1 Misfire due to ignition fault check HT leads are correctly fitted to all spark plugs and coil connectors and that spark plugs are in good condition Broken or shorting injector wiring check using injector wiring tester Excessive fuel pressure gt 58 psi Air leaks in exhaust or inlet manifold Liquid fuel in pu
6. 12 amp 17 degrees If it is not check all inputs for correct readings and check idle speed is set at 950 RPM EE Hi is User Manual software for Speed Six engine 6 12 FUEL PUMP This denotes if the ECU has turned on the fuel pump It does this by grounding pin 25 of the ECU which completes the circuit for the fuel pump relay thus turning the relay on If the pump appears turned on by the ECU but does not work check to see if the inertia switch has tripped the MIL lamp will turn on for 3 seconds when ignition is turned on The inertia switch is located in the boot above the fuel tank If the fuel pump still doesn t work check on a Cerbera that the relay No 4 has a 12V supply to pins 85 amp 30 51 if it does not check fuse 19 NOTE The fuel pump relay must be a twin make brown relay RAD FAN This denotes if the ECU has turned on the radiator cooling fans It does this when the water temp input is above 92 C for Fan 1 94 C for Fan 2 or if a fault is present in the water temp input ECU pins 6 amp 41 are grounded to turn on the cooling fan relay s If the fans appear turned on by the ECU but do not work check on a Cerbera that the fan relay 1 amp 7 has a 12V supply to pins 85 amp 30 51 if it does not check fuse 1 3 and 20 Screen 2 ELECTRICAL FAULT STATUS SCREEN This screen shows any input faults that the ECU has detected Current faults are shown at the top logged faults below Logged faults are
7. E Battery voltage is displayed in volts It should normally read between 12 0 amp 13 8 V There is no default value BAROMETRIC PRESSURE Barometric pressure is measured from the left hand air box and is displayed in mBAR It should correspond to the air pressure as measured on a barometer If the ECU detects a fault with this reading it will substitute a value of 1000 mBAR The pressure sensor is mounted inside the car to protect it from excessive heat If incorrect readings are displayed check the pipe between the sensor and airbox for blockages or leaks LAMBDA 1 amp LAMBDA 2 Lambda 1 amp 2 show the signals from the lambda sensors on each set of three cylinders Lambdal1 is the front three cylinders ie cylinders 1 2 amp 3 and lambda 2 is the rear three cylinders ie 4 5 amp 6 After starting the sensors will take at least 30 seconds to warm up before they will read correctly Once warmed up the lambda signals should switch between approx 0 amp 1 1 5 volts 0 volts shows that the fuel mixture is lean 1 volt shows that the mixture is rich The rate of switching will alter with engine speed and the percentage of time spent rich relative to lean will alter with engine load If reading is a CONSTANT 0 V check sensor for proper connection and sensor heater wires for continuity 6 ohms between white red wires NOTE Lambda sensors are supplied with 12V on the red wires ONLY WHEN THE FUEL PUMP IS RUNNING the WHITE wire is earth and
8. EE Hi is User Manual software for Speed Six engine 1 12 TVR Speed Six diagnostic software Help on real time Display cccccccccssessseesseesseeesecessececesseecsseeeseceseeeeseceseeseesesesesecesaeseteeeseenees 3 Screen 1 ENGINE MONITOR SCRBEE N iis ees ups eie ie ed oe ke ee Ge Gee Ge Sk GE Ge eo 3 TSP di EE EE E E ME GR NE N EE EES 3 OUTPUTS EO EN EE N N EE N EE OE EE ENG 5 FUEL L amp FUEL 2ste Ge Ne ed MR ee Gee ee i E Ge dd eb Ge Se ee ee N E 5 ADAPTIVE amp ADAPTIVE 2 as soes sesse ee ees de ee ek ee ge be gek eed oe Geb Gee ee 5 EE ALS AE E A T 5 EUELPUMEP ese ie ws ees ie Ee er seed ee ee be se ee ee ee ee E ede ese Ea 6 RAD FAN ee ei ee essence de Ges eu bee de ede ee ee ee ee a aa 6 Screen 2 ELECTRICAL FAULT STATUS SCREEN 4 susse sn se ede sk keen e ee ses sees genee N 6 THROTTLE 1 or 2 FLUT EE OE ONA EN 6 WATER EET ie see e Ge ee ee oe EEE EEE ee er ES 7 AIR MEE IE OE N EE N EE EE OE EE 7 BARO FE AE N OE N ET RE OE OE EE R 7 BAT MEE EE RE N EE serrate 7 LAMBDA 1 amp LAMBDA 2 sissies es Ge ee es ee en Nee ei ed ee 8 AFR 143 MAG FLT ee ee Se ve De ie ee Ee 8 CRANK WIRING esteties seed eed ee es AG Re Ge Ge RR SR Gee pd Gee 8 CRANK SENSOR sacs ceases EE OE EE EE EE EE EE 8 Screen 3 THROTTLE POT SETTING SCREEN ees ges ens es kes esse Ko eed ee kg ves ede es 9 Screen 4 AFR STATUS SCREEN sesse esse esse ee see esse esse eed Gede Ge eed ed ee ed Ged ee 9 Help on Real time Logging e
9. OUNT OF SILICONE SEALANT TO PREVENT WATER INGRESS WATER FLT This fault is shown if the water temperature signal is out of range If it occurs a water temp of 95 C will be substituted the cooling fans will be turned on to prevent overheating and the MIL lamp will be turned on Water fault can be caused by 1 Water ingress into the water temperature sensor s connector or wiring 2 Mechanical damage to sensor or wiring 3 Corrosion on sensor terminals or connector 4 Faulty sensor AIR FLT This fault is shown if the air temperature signal is out of range If it occurs an air temp of 10 C will be substituted and the MIL lamp will be turned on Air fault can be caused by 1 Water ingress into the air temp sensor s connector or wiring 2 Mechanical damage to sensor or wiring 3 Corrosion on sensor terminals or connector 4 Faulty sensor BARO FLT This fault is shown if the barometric pressure signal is outside its normal range If it occurs an atmospheric air pressure of 1000 mBAR will be substituted and the MIL lamp will be turned on Barometric fault can be caused by 1 Kinked broken or blocked barometric sensor pipe 2 Excessively clogged air filter 3 Mechanical damage to sensor or wiring 4 Corrosion on sensor terminals or connector 5 Faulty sensor BAT FLT This fault is shown if the battery voltage falls below 11 V or rises above 17v whilst engine peed is above 1500 RPM Battery fault can be caused by
10. adings from a large distance The throttle pots should maintain a reading of approx 15 WHEN THE ENGINE IS IDLING AT 900 950RPM If they do not reset them from the ecu tools menu DO NOT ADJUST ON THE ENGINE The throttle pot inputs are very sensitive and may be subject to a certain amount of electrical noise 2 this is normal Noise may also be generated by wear in the throttle spindles which allows the spindle to vibrate in time with the pulsing of the engine However if this noise is excessive the ECU may start to add acceleration enrichment fuel If this occurs observe THROTTLE box in the AFR STATUS SCREEN check that the HT leads are in good condition FITTED TO ALL THE PLUGS CORRECTLY and NOT TY WRAPPED TO THE MAIN ENGINE HARNESS This fault is most likely to occur on older or high mileage cars and can cause an MOT emissions failure if it is bad enough to prevent closed loop lambda control from working during the test Change the throttle pot if this fault persists and check for excessive throttle spindle wear Screen 4 AFR STATUS SCREEN This screen shows in more detail the workings of the closed loop fuel system It should be viewed to establish that system is working correctly In order to work correctly the catalytic converters must be supplied with exhaust gas from chemically correct combustion This means that the air fuel ratio must be maintained at 14 7 1 This is done by using LAMBDA sensors in the exhaust gas
11. ean OV with rich spikes 1V User Manual software for Speed Six engine 10 12 As the load increases the engine should tend towards equal periods of running rich and lean As the throttle position tends towards fully open 769 closed loop control will be suspended in order to maximise performance This is shown in the LAMBDA CONTROL box EE Hi is User Manual software for Speed Six engine 11 12 Help on Real time Logging To select real time logging use the WINDOW menu at the top of the screen or click on the real time logging title box using the left mouse button The real time logging window shows the inputs and outputs of the ECU as they are happening i e in real time You can choose which parameters you wish to log from a menu accessed by pressing the RIGHT HAND mouse button when the cursor is on the real time logging screen You can record your logging session by clicking on the record box on the screen The blue box should now flash RECORDING in red To end your recording click on the stop box current data will continue to be displayed in the logging screen To replay the recorded data click on the replay box Maximise the logging screen by clicking on the up arrow at this screen To further enhance viewing you can zoom in on a section of screen by holding the left mouse button down and drawing a box with the cursor Releasing the mouse button will zoom the screen to the box that has been drawn After zoo
12. es esse ee RR RR Re Re ee ee ee ee ee Re Re Re ee ee Re ee ee ee 11 Help on Using the maps esse ees se se iera GR Re Re RA RA Re Re ee Re Re ee ee ee ee ee ee ee 12 User Manual software for Speed Six engine 2 12 EE Hi is User Manual software for Speed Six engine 3 12 Help on real time Display The Real Time Display has 4 screens Use the PgUp and PgDn keys to switch between them The first screen is the main screen called the engine monitor screen and it shows all the main inputs and outputs of the ECU Press PgDn whilst in help to find HELP for other real time screens The second screen is the electrical fault status screen and it shows the ECU fault diagnostics The third screen shows the throttle pot readings in large text to aid throttle pot setting The forth screen shows the closed loop fuel control status Screen 1 ENGINE MONITOR SCREEN INPUTS ENGINE SPEED Engine speed is displayed in RPM and it should correspond to actual engine speed Spurious or non existent readings denote a faulty sensor or sensor wiring Check sensor for damage metal debris on its end corrosion or water in its terminals and correct polarity see wiring diagram THROTTLE POSITION Throttle position is displayed as a percentage of throttle potentiometer movement 15 corresponds to a fully shut throttle 94 to a fully open one There are two throttle position sensors one for each set of three cylinders Page down to the third real time sc
13. ming press escape to return to the logging screen If a large amount of data has been logged you can scroll through it using the left or right arrows to find the section of interest Control and arrow will scroll quickly If you wish to keep recorded data permanently you must specify a file name under which it will be kept To do this press the right mouse button and choose change filename Click on the filename box then type in your chosen file name followed by rtl e g testl rtl If you do not specify a filename a temporary file called Temp1 rtl will be used This will be overwritten next time you log something Logged data can be replayed without the ECU connected The cursor can be used to point to any part of the logged trace and the logged data at this point will be shown in the box on the right hand side of the screen EE Hi is User Manual software for Speed Six engine 12 12 Help on Using the maps The adaptive maps can be uploaded from the ECU so that they can be inspected for spurious data that could be responsible for poor or erratic running To do this choose ECU TOOLS from the menu bar followed by upload adaptive map and bank123 or bank456 The adaptive map will then be displayed in numerical and graphical form The graph represents one line of the map below it This line can be selected by clicking on to a speed box or throttle position box E g if you click on the 2000 rpm box all throttle positions at 2000
14. or circuit is OK then the tester will flash whilst the engine is running DO NOT RUN THE ENGINE FOR EXTENDED PERIODS WITH THE INJECTORS DISCONNECTED AS SERIOUS DAMAGE TO THE CATALYTIC CONVERTERS WILL OCCUR ADAPTIVE 1 amp ADAPTIVE 2 These numbers represent the percentage by which the ECU has adjusted the amount of fuel being injected in order to achieve the correct mixture There are adaptive values for every combination of speed and load which will change independently of each other If the engine is running correctly this percentage should be low If it is high gt 20 percent then a fault or maladjusted throttle pot should be suspected Typical faults could be 1 Incorrectly fitted or damaged HT leads lubricate the Ht lead boots with WD40 before fitting and ENSURE YOU HEAR THE RETAINING CLIP CLICK ONTO THE SPARK PLUG TOP Air leak into intake or exhaust manifolds Damaged or badly fouled spark plugs Damaged injector wiring test with injector wiring tester Excessive purging due to high fuel temperatures Carbon Can or purge lines contaminated with liquid fuel De PP IF A CAR HAS BEEN RUNNING BADLY WITH FAULTS PRESENT THE ADAPTIVE MAPS MUST BE RESET TO ZERO This is done by selecting ZERO ADAPTIVE MAPS from the ECU TOOLS menu Disconnecting the ECU does not erase its memory on 941 series ECUs IGNITION Ignition timing is displayed in degrees before TDC At idle with coolant temp above 80 C it should be between
15. reen to display throttle pot readings only Throttle pot readings should be equal on both banks to within a few percent and must not fluctuate more than 3 The readings should increase smoothly with increasing throttle travel If a fault is detected with one of the throttle pot readings it will substitute the value from the other throttle pot so they will both display EXACTLY THE SAME READING The throttle position sensor is NON ADJUSTABLE on all 6 cylinder engines If the throttle potentiometer is replaced or the throttle linkage is adjusted in any way the closed throttle position should be reset This is done from the ECU TOOLS menu by clicking on reset throttle This must only be done when the throttles are in the idling position The idling position will be monitored by the ecu and re adjusted to maintain the minimum position to approx 15 AIR TEMP Air temperature is measured by the sensor located next to the air filter If the ECU detects a fault with this reading it will substitute a value of 10 degrees C EE Hi is User Manual software for Speed Six engine 4 12 WATER TEMP Water temperature is measured by the sensor located in the cylinder head If the ECU detects a fault with this reading it will substitute a value of 95 C The engine cooling fans are controlled by this temperature reading and are turned on at 92 C off at 88 C Therefore under fault conditions the cooling fans will be turned on BATTERY VOLTAG
16. rge system check that the fuel tank breather pipe is higher than the filler cap and that the carbon can is empty of liquid fuel 6 Excessive purging due to overheating fuel check fuel pipe routing for heat pickup insulate or reroute as required 7 Incorrectly adjusted or faulty throttle potentiometers check readings 8 Faulty lambda sensors or lambda sensor wiring CRANK WIRING This fault is shown if the crankshaft speed sensor is incorrectly wired up Check polarity and reconnect as shown in wiring diagram black to pin on sensor and to pin27 on ECU white to pin 2 on sensor and to pin 12 on ECU CRANK SENSOR This fault is shown if the crank sensor signal is poor If it occurs the MIL lamp will NOT be turned on It may however flash as a poor signal is detected depending on the severity of the fault Crank sensor fault can be caused by 1 Debris on end of crank sensor remove and clean 2 Water ingress into sensor connector or wiring Corrosion on sensor terminals clean or replace connector terminals using only gold plated terminals 3 Damaged trigger wheel on flywheel 4 Damaged crank sensor wiring replace ONLY WITH SPECIAL CRANK SENSOR WIRE N PD EE Hi is User Manual software for Speed Six engine 9 12 Screen 3 THROTTLE POT SETTING SCREEN This screen shows the readings from throttle pot one at the top of the screen and throttle pot two below in large text This enables you to see the throttle pot re
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