V-checker A301 is a multi-function trip computer which helps users to quickly access to vehicle trouble code information and vehicle status. The device can provide alerts when several abnormal occur to the vehicle. The function of clearing trouble code greatly reduces the expensive maintenance costs and widely favored by users.
The device’s interface can be customized according to user’s preferences so that the user can freely review the vehicle information.
The device can be installed without changing the original vehicle cables. Just plug and the device works immediately, easy to use.
The device supports all OBD compliant vehicles.
Multilingual device supporting Simplified Chinese, Traditional Chinese, English, Russian.
Product Features :
l Four display mode: Idle, Cruise, Sport, Details.
l Multiple security alarm: Trouble code, Water temperature, Fatigue driving, Over-speed, Shift reminding,Periodic
maintenance tips, etc.
l Multiple fault diagnosis: Read DTC,Clear DTC.
l Multiple fuel consumption: Static instant fuel consumption(L/H), Dynamic instant fuel consumption(L/100Km),
Average consumption fromcumulative total, etc.
l Real time display vehicle information: Vehicle speed, Instant fuel consumption, Intake air pressure, Acceleration,
Coolant temperature, Oxygen sense voltage, etc.
l Applicable models: all modeles support the OBD standard.
l Language: Simplified Chinese, Traditional Chinese, English, Spanish,Polish,Hungarian, Russian, Czech, Turkish, etc.
Package characteristics | |
Dimensions(W x H x D) | 170mm × 130mm × 80mm |
Weight | 0.40kg |
Electrical characteriatics | |
Working voltage | 8 - 36VDC |
Working Current | 100mA |
Working power | 1W |
Standby Power | 0.6W |
Update file | Software Name | Released | Languages | Download↓ |
A301_ENGLIH_V3.53 | 2013-03-21 | English |
Update tool | USB_Driver(WindowsXP) | |
USB_Driver(Windows7) | ||
Software upgrade | ||
Upgrade Instructions |
User Manual | User Manual | |
Advertise | leaflet | |
Display rack | ||
Magazine advertise | ||
Quick Use Guide |
Question: The trip computer can use on what car models? (A301, A305, A501).
Answe : All the cars that support the OBD standard can be used, the domestic production of all models after 2007 have
the OBD standard, so all can use the auto trip computer. Individual joint venture brands of vehicles (for example: Volkswagen, GM, Honda, Toyota, etc.) has been applied before 2007, this need to be decided on the specific models.
Question: Why the first time to use A301 computer, follow the prompts, the screen display “No supported system, Press any key to retry”?
Answer : It means that this car is not standard OBD2. The trip computer is not applicable for this car.
Question: Where is the car's OBD interface?
Answer : OBD interface position of principle: the driver, the radius of 0.5 meters, the driver within the hand can come into contact with. There is no uniform standard of The OBD interface specific location. Generally it is under the steering wheel, above the brake pedal. If you still can not find the diagnostic interface, please call your local 4S shop for help.
Question: What needs to be paid attention to when install and remove the trip computer.
Answer : Installation steps: (You must install in accordance with the following steps strictly, otherwise it may damage the device).
l Turn off the engine key.
l Connected the host, USB cable, the OBD diagnostic data line, auto trip computer bracketcorrectly
l To ensure safe, reliable and beautiful effect, the OBD diagnostic data line must be lined according to the
characteristics of the car models.
l Plug the OBD interface on the diagnostic data line into the car OBD
l Switch auto trip computer the bracket(B302) to the ON position.
l Turn on the car and turn on auto trip computer, make initialization settings according tothe hints on the host screen.
Removal procedure: we must first turn off the car keys, and then unplug the OBD diagnostic data line.
Question: Why do well in the car (Volkswagen), but for the other car (Toyota) can not be used, how to do the factory settings?
Answer : In order to ensure the quick using of the trip computer, it will scan the communication mode of the car, then lock the communication mode to the car. If you remove the trip computer from the first car and install it in another car, you should perform "factory settings". After restored, the trip computer will automatic ally re-scan communication mode of the new car.
"factory set" steps: plug the OBD diagnostic interface → Power on the trip computer → Display first screen → Press [OK] button quickly → Show hidden menu → Select the "factory set".
Question: Why the trip computer always Alarm for temperature too high?
Answer : The trip computer’s water temperature alarm default setting value is 100 ℃, the temperature of the different models are different settings. Generally the car has a low speed fan and a high-speed fan, when the temperature reaches a dangerous range; high-speed electronic fan will open to effectively reduce the temperature of coolant. It is very dangerous if the high speed fan can not start in time. You can check the starting temperature of the fan and set the water temperature to the specified value.
Question: Fuel consumption is not correctly, How to set fuel consumption factor?
Answer :The fuel consumption factor is used to adjust the "fuel consume”, the current default value is 331. This coefficient is based on a complex formula and experience in numerous tests of the car. We don’t recommend you change this value. If the vehicle was modified or age of the vehicle too old, causing the vehicle sensor aging, drift. You can adjust according it to their proportion of the actual situation of the vehicle.
Please strictly operate as following settings:
l The vehicle's fuel consumption constant value (fixed speed real-time fuel consumption of the vehicle value),
you can get fuelconsumption constant value by vehicle manufacturers or professional surveyors car site.
l According to the acquired constant fuel consumption value, driving as this average rate constant speed,
and record the trip computer screen shows the real-time fuel consumption value
l Calculate the trip computer real-time fuel consumption coefficient values (real-time fuel consumption
coefficient value = 331 * published fuel consumption constant value / trip computer displays instant fuel
consumption value). for example: Published constant fuel consumption value (in speed to 80Km / h
constant speed fuel consumption is 6.2 Liters/100Km), the trip computer display real-time fuel consumption
is 7.5 Liters/100Km (in the speed to 80Km/h constant speed with the case), the precise instant fuel consumption
coefficient value = 331 * 6.2 / 7.5 = 273.
l Enter the instant fuel consumption coefficient values. The trip computer work properly, press the "OK" button
→ Select "Instrument Setup" → Select "Fuel consume", Instant fuel consumption → Input calculated coefficient
values, and save, it will be used normally.
Question: Why continue cruising mileage data show no data?
Answer : The default settings for the trip computer do not show "Mileage" function , specific settings: When the trip computer work properly, press the "OK" button → Select "Instrument Setting" → Select "Interface Set" → Configuration mode (configure the idle mode, cruise mode, sport mode) → Press the "OK" button on the configure needed → Press "↑" ,"↓" key to find the "Remain mileage to gas station" → Press "OK" button to confirm → press "C" key to exit and save. Mileage configuration needed will be shown on the display mode.
But at this moment, "Mileage" still display "---", still need to manually enter the fuel tank fuel remaining, specific settings: the trip computer work properly, press the "OK" button → select "Instrument Setting" → Select "Remain Fuel "→ enter the remaining fuel value. This Mileage functions can be used normally.
Question: Why settled the shift reminder function, when the speed reaches a settled value, my trip computer do not remind.
Answer : The shift reminder function does not work under the cruise and idle modes. It can only work in the competitive mode.
Question: Why running the trip computer cause the various indicators of the dashboard do not work normally (such as: airbag lights, ABS lights, the clock of car slow down)?
Answer : As the trip computer support multiple communication modes, and each car support only one of the vehicles ordinary communication mode, the car diagnostic interface OBD are not fully in accordance with the standard definition, which would lead to this situation. According to the communication model to support the vehicle traffic computer A301's OBD connector pins in the metal processing, handling as follows: 【Communication: ISO15765 CAN Bus, keep 4/5/6/14/16 metal pin】,【Communication: ISO14230 KWP2000, keep 4/5/7 / 15/16 metal pin】, 【Communication: ISO9141-2, keep 4/5/7/15/16 metal pin】, other metal pins can be cut off.
Question: Why when using the trip computer, cause the car to do not launch when turn on the key or other electronic function do not work normally?
Answer : It is possible that the trip computer with the original car alarm conflict (the users install car alarm is not the same case), resulting car does not fire at launch time by setting boot method can solve this problem. Specific settings: when the trip computer work normally, press the "OK" button → Select "Instrument Setting" → select "IGN & Startup" → Select "OFF" (car keys hit the ON position when the trip computer automatically boot) , Select "Yes" (only when launch vehicle, the trip computer start).
Question: The trip computer can quickly get vehicle trouble codes, Is there any way to test this function safely?
Answer : Open your engine cover, disconnect the oxygen sensor or throttle position sensor etc plug like this. Start the engine, in about 4-5 seconds, the engine fault light comes on, A301 also will alarm when the engine start, and shows the problem precisely.
Question: If do not use vehicles for a long time and worry about car battery power consumption, what to do?
Answer : Usually the trip computer power consumption is very low, do not affect the vehicle's battery power, if do not drive the car for 10 days, it is recommended to switch off the power button on the host.
Question: The trip computer can not turn off after the ignition is turned off for more than 5 minutes, why? Generally how long do we need to wait?
Answer : Generally speaking, the vehicle turn off the key is plug out, the trip computer will automatically shut down after 30 seconds. But the specific time is determined according to the different vehicle ECU, some vehicle ECU takes longer time, about 5 minutes or so, so the users can leave when the key is turned off, the trip computer will automatically shut down, and will be no problem.
Question: When summer the temperature is high of the car, if the LCD can work alright?
Answer : The normal working temperature: -20 ° C to 90 ° C in summer and winter, so certainly can be used normally.
Question: After the trip computer run, some vehicle parameter’s display "----" or "No", how to do?
Answer : When first use, the system will automatically scan the vehicle mode of communication, and sometimes there will be more than one ID selector, If you do not choose rightly which will cause the system work improperly. Reset the trip computer to re-scan communication, select another group ID correctly.
Question: Why is the character showed on the screen is not so clear?
Answer : Press the "OK" button on the idle mode → Select the "Instrument Setting" menu → select "Contrast" menu → through the "↑" ,"↓" key to set the contrast until normal.
Question: Does the trip computer need to be upgraded, how to upgrade?
Answer : Generally, if you use the trip computer normally, we do not recommend you to upgrade it; of course, we have been upgrading and improving the features of the trip computer continuously. Log our official website: www.v-checker.com, click on the "Products" → click on the Product Type → "Download" → "trip computer software", "the upgrade data cable USB drivers", "upgrade software", "detailed description of the upgrade" click to download, strictly follow the detailed description of the upgrade to upgrade the trip computer.
Question: The trip computer can be added to tire pressure monitoring (TPMS) function? How to do?
Answer : The standard trip computer is no tire pressure module T301, this will need to contact your dealer to purchase the module can be used normally, when the module is installed correctly, you need to enter the on-screen activation information (which can be obtained from the dealer).
Question: Why the average fuel consumption is not accurate after using the trip computer for a few days?
Answer : The average fuel consumption is calculated based on fuel consumption and kilometers. Since you have just had a short trip at beginning, which may cause the average fuel consumption isn’t accurate. The longer distance you traveled the more accurate average fuel consumption number would be(usually need to travel 300 kilometers).Normally the average fuel consumption is very accurate, if you found large deviation com pare to actual fuel consumption, customer can adjust it following this method: fill the duel tank (until it auto shut off), clear the oil gauge. At the same time make A301 to factory reset, and clear the average fuel consumption no. to 0, then travel A km (recommended 400-500 km) and then to refuel B liter (until it automatically shutoff), calculate C = B * 100 / A is the real fuel consumption per hundred kilometers, A301's average fuel consumption displays D, the average fuel consumption coefficient of E (the system defaults to 116), the user can modify A301 average fuel consumption coefficient = E * C / D. This average fuel consumption must be very accurate.
Question: Why the trip computer display slower speed than the car dashboard display speed?
Answer : Almost all of the instruments in the car speed do not display accurate, it is out of the security considerations, the car factory design on 2-5% higher than the actual speed, that is why when the dashboard shows the speed is140Km/H on the highway, and no over speed shooting, because actually the real speed is about 120 Km/h.
Question: Why the slower of my car, the higher of the instant fuel consumption?
Answer : You should know this fact: when the car is in neutral sliding, the fuel consumption is not 0. Look at the formula: = instantaneous fuel consumption per hundred kilometers = (100 * Cumulative injection volume) / (speed * time). In the lower speed mode, the engine fuel injection is small; speed is low. It needs to take more time to drive 100Km, when the speed is very low, the time is almost infinite. According to the formula, the instantaneous fuel consumption per hundred kilometers show to be growing. Note: The instantaneous fuel consumption per hundred kilometers! = fuel injection quantity!
Question: When the car is running at a speed 2000RPM or above, instantaneous fuel consumption shows about 10L/100km when sliding in gears, is there any problem on caculation? Why the instantaneous fuel consumption is increasing when the car is in neutral, does it need more power in this case?
Answer : fuel consumption no. is bigger when put the car in gear than in neutral, it’s about 1L/H. It needs energy when we put more power on veering, electrical equipment or brake pump at this moment. Instantaneous fuel consumption maybe bigger If we put the car in neutral to slide in a low speed. when the car is moving at a speed 1500RPM or above, normally ECU will make the without using any energy, so the fuel consumption is 0 at the moment.
Question: When the car is sliding in gear at or above 1500RPM with instantaneous fuel consumption 0, but why mine shows 7-8?
Answer : 1500RPM is just an approximate number, It’s determined by actual driving speed and water temperature to low down the speed and stop fuel consumption(turn the fuel on before the car warm up).If it shows 7-8 on fuel consumption screen, that means the speed does not lowed and fuel is still consuming now. you can try a slide in gear at a speed 60Km/h, it should show 3 or less.