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CONNECTION – POWER SUPPLY AND CAN BUS
The following applies to all display variants of the MFD28 , MFD32 , MFD32S , MFA28 and all vehicle-specific displays.
In the picture you can see the display from behind:
connector description
| Connector A: Molex 43025-0800 | Connector B: Molex 43025-1000 |
Pins / connection cable
Each delivery comes with a 20cm long connection cable and individual pins that you can crimp yourself. Alternatively, you can use the following pins with a suitable crimping tool
| Pins: Molex 43030-0001 |
Connection
Depending on the use of external modules/sensors, it may happen that pins have to be assigned twice. Here it has to be spliced (divided) appropriately. Please make sure that the wiring is clean to avoid malfunctions and short circuits
| Power supply: | A5 (12V / switched plus) fused with 2A A1 (ground) |
| CanBus: | B2 (Can High) B3 (Can Low) |
| Four analog inputs: | A3, A4, A7, A8 (signal) A2 (5V supply) A6 (sensor ground) |
| External shift light: | B4 (Signal) B8 (5V) B9 (Ground) |
| Boost pressure control valve: | B7 (clocked ground to the valve) B9 should also be connected to the vehicle ground. Please connect the 12V supply to the valve separately |
| *Serial module: | B5 (RX – goes to TX on the module) B10 (TX – goes to RX on the module) B8 (5V power supply from the module) B9 (ground for the module) |
*Gen1 only
CanBus
In the display menu under “TRI File” (Gen1) or “Can Bus” (Gen2) you activate “Can Term” and select the appropriate Can Bus speed (usually 500kbps – alternatively, consult the documentation from the control unit manufacturer or change it yourself. if it is a freely programmable one).
Existing Can Bus
If you insert the display into an existing Can Bus, you deactivate the 120Ohm resistor in the display (Gen1: Menu => “TRI File” or Gen2: “Can Bus” => “CanTerm”). Here, too, you have to set the Can Bus speed appropriately.
protocol
The display supports Can Bus 2.0a and 2.0b – Base frame format (11bit) or Extended frame format (29bit). Based on this protocol, the display supports OBD2 , UDS and TP2.0 via Can Bus. For this, the display requires the appropriate firmware ( update/software update )
If none of the protocols mentioned is used, the protocol must be deactivated or the appropriate firmware installed
DOWNLOADS
Quick Start Guides / Manual
| MFD28MFD32_Gen2_quickstart_DE.pdf | Quick Start Guide | January 19, 2023 |
| MFD28MFD32_Gen2_quickstart_ENG.pdf | Quick Start Guide ENGLISH | January 19, 2023 |
| MFD2832-Gen2-Manual.pdf | Manual GERMAN | February 21, 2023 |
| MFD2832-Gen2-manual.pdf | Manual ENGLISH | February 21, 2023 |
UPDATE / SOFTWARE UPDATE
To update your display to the latest version, you need the CANcheckedUpdater for your corresponding operating system.
Here you can download the CANcheckedUpdater for a 64-bit Windows. You can download the CANcheckedUpdater for 32-bit Windows here . Both programs run without drivers under Windows 10. A driver is required for Windows 7 .
You can find the CANcheckedUpdater for Mac OSX here .
Please close the DSS before starting the update of your display!
If you get the error message ” Permission denied for device… “, it can help to restart the PC/laptop and run the updater as administrator or disconnect the display from 12V and plug it in and out of the PC.
Before you can start the update, you must download the appropriate firmware for your display.
- You can find the update file for your Gen1 display here: Downloads MFD28 / MFD32 / MFD32S / MFA28 Gen1
- You can find the update file for your Gen2 display here: Downloads MFD28 / MFD32 / MFD32S / MFA28 Gen2
Update
A micro USB data cable is used for the update. If there is no sound when you plug it in, you are probably using a charging cable. A suitable cable is always included in the delivery.
The USB port on the display is very small and sensitive. Please exercise the utmost care here.
Once the display is plugged in, it appears in the updater. Then click on “Upload” and select the hex file. The update starts automatically. Meanwhile, do not unplug the display and let the program run through.
ANALOG INPUTS
All of our displays (can be found under Products ) have analog inputs – i.e. 0-5V inputs, which can be used to connect such sensors. The sensors cover a wide range of applications:
- boost pressure
- exhaust back pressure
- Lambda/AFR*
- oil pressure
- Fuel pressure
- flue gas temperature*
- Water temperature*
- Intake air temperature*
- Oil temperature*
* Additional electronics may be required
Electrical connection
ATTENTION: the total 5V power supply for all inputs together must not exceed the current of 1A. This is important to note!
All work on the electrical system must be carried out with extreme caution and should only be carried out by trained personnel. CANchecked assumes no liability for damage to the vehicle or its components or to the display!
The display offers a supply line for 5V and ground, where the voltage supply of the sensors can be tapped. If the sensor already has a power supply (via the control unit or internally), only the ground cable needs to be connected to the sensor.
The 4 cables for the analog inputs must be connected to the signal output of the sensor.
Linear sensors (e.g. pressure)
Here we describe the connection of linear 0-5V sensors such as:
- boost pressure
- oil pressure
- Fuel pressure
- Water pressure
- external lambda controller
- Type K converter
- Distance sensors for chassis
- and much more.
These sensors are usually powered by 5V voltage, which can be taken directly from the display (pin A2). You also need ground (from display pin A6) and signal (on one of the pins A3, A4, A7, A8 on the display). You will find information on how to calibrate the sensor in the sensor data sheet. In our DSS you can now add the analog inputs individually, if they are not already available in the “TRI Editor”.
First connect to the display via USB, confirm the pop-up window and go to the “TRI Editor”. Click on the desired analog inputs and select “Apply”. If the selection fields are grayed out and you are with the mouse cursor over the sensor, it will be displayed in green for the sensors.
Then click on “Details” for the newly added sensor and make sure that it is set to “MAP” (other options here are “OFF” and “NTC”).
Here you can now rename the sensor, determine the number of decimal places and specify the 0V and 5V value.
If other voltage values (usually 0.5V and 4.5V) are specified in the data sheet, use the “calculate” button and the DSS will calculate the data for you. Click on “OK” and the values will be applied.
Once you have completed the sensor configuration, click on “Apply” in the popup and don’t forget to permanently save the data on the display using “Save to display”.
NTC sensors
To connect NTC sensors, an additional resistor is required. The NTC sensor is connected to ground and the analog input of the display. Additionally, a 1K1 resistor (1000 Ohm, 1%, 0.25W) is connected between the analog input and 5V.
In the DSS you import your TRI file from the SD card in the display and set the corresponding input to “NTC” (other options are “OFF” and “MAP”). With the “calculate” button you enter three pairs of values (temperature/resistance). The fourth value (“pullup resistor”) indicates the resistance value in ohms (1000 = 1k ohms).
Don’t forget to activate your input with “Activate”.
NTC option in DSS
Three values assigned
Configuration on the display
The sensors cannot be configured directly on the display. The majority of the TRI/TRX files are already preconfigured for the connection of four analog sensors
- AIN1: CANchecked Oil/Water Temperature Sensor (CC22902) *NTC Sensor: Resistor required
- AIN2: Exhaust gas temperature sensor 0-1250°C (Type K converter board required)
- AIN3: CANchecked oil/petrol/water pressure sensor (CC22901)
- AIN4: CAN checked Boost Sensor (CC22900)
Analog input test
To test the input or the mapping, proceed as follows:
- Disconnect sensor
- Switch on display
- Select the sensor in the display on a suitable widget
- Apply 5V to the input cable => the value in the display goes to the maximum
- Remove 5V again
- Put ground on the input cable => the value in the display goes to the minimum
More settings
The following settings are only for people who like to experiment and/or want the settings to be really precise.
Renaming an analog input
The entire configuration can be edited and expanded with our DSS .
Here you can edit and rename all sensors – including the analog inputs. Please pay attention to the maximum length of 15 .
Smoothing of values
If the analog values jump too quickly (values “fidget”) or the update rate is too slow/inaccurate, the DSS can adjust this. Learn more in our Gen2 guide.
Tested sensors
In general, all linear 5V and NTC sensors are supported. Here is a selection that has already been tested or is being used by customers.
| Manufacturer/number | use | 0V value | 5V value |
| CAN checked CC22901 | Oil and gasoline pressure | -1.25 bars | 11.25 bar |
| VAG 03C906051A | Oil and gasoline pressure | -1.25 bars | 11.25 bar |
| Prosport Premium | Oil and gasoline pressure | -1.25 bars | 11.25 bar |
| Bosch 0281002401 VAG 038906051C | Air pressure/boost pressure -1 to 2bar | -1.05 bar | 2.23 bar |
| Zadatech | Air pressure/boost pressure 0-10bar absolute pressure | 0.03 bar | 10.34 bars |
| Zadatech Bosch ADV | Lambda controller | 7.4 AFR | 22.39 AFR |
| Zadatech Bosch ADV | Lambda controller | 0.50 lambda | 1.52 Lambda |
| Zeitronix ZT-2 | Lambda controller | 9.6 AFR | 19.6 AFR |
| Zeitronix ZT-2 | Lambda controller | 0.65 lambda | 1.33 Lambda |
| Spartan 2 | Lambda controller | 0.68 lambda | 1.36 lambda |
| Spartan 2 | Lambda controller | 10 AFR | 20 AFR |
| Knödler L-MW V4.0 12V B/E/S | Lambda controller | 10 AFR | 20 AFR |
| Knödler L-MW V4.0 12V B/E/S | Lambda controller | 0.7 lambda | 1.3 Lambda |
| CANchecked | Boost sensor CC22900 relative pressure | -1.31 bar | 6.46 bars |
| Reveltronic EGT-K 1/2/4 Channel | Exhaust gas temperature | 0 degrees | 1250 degrees |
| Zadatech | Air pressure/boost pressure 0-6bar relative pressure | -0.94 bar | 5.67 bars |
| CAN checked CC22902 | *Oil/water temperature | 0.00156164 0.00022520 0.00000016 1000 |
* with 1 kOhm pull-up resistor
** please set the input to “NTC” in the “TRI Editor” in the DSS and assign the appropriate values
All statements without guarantee.
MANUAL
These instructions apply to the MFD28, MFD32, MFD32S and MFA28 as Gen2. For Gen1, however, the DSS part is very similar.
Please download here as PDF:
German: MFD2832-Gen2-Manual.pdf
English: MFD2832-Gen2-manual.pdf