Kortometer - Universal Dashboard 10 inch - (LINK, ECUMASTER, STEALTHPCM, MAXXECU, MEGASQUIRT3, SPTRONIC, ABIT)

The universal dashboard is designed with a rectangular body featuring rounded corners. The external dimensions for the 10-inch version are 272x123x35mm, and for the 12-inch version, the dimensions are 325x145x35mm. Four embedded M4 nuts on the rear side of the dashboard are used for mounting.

Connections

Two types of connectors are used for connections:

1. Round 7-pin aviation connector XS-12 (for power and CAN bus).
2. Three standard USB cables (30 cm) for connecting additional devices (joystick, GPS, ECU VEMS, flash drive for software updates, and log resets). The USB device connection order is arbitrary, and cables can be extended with any standard USB extensions if necessary.

The dashboard powers on with the ignition (yellow wire). After the ignition is turned off, the dashboard stays on for a preset interval before entering sleep mode with the display off. It can wake instantly when the ignition is turned on. If no ignition signal is received within the sleep period, the dashboard shuts down completely. It is undesirable to disconnect the main power (constant positive red wire) while the dashboard is operating.

Control

The dashboard is controlled via a joystick. Pressing the joystick enters the menu, and rotating the joystick adjusts the brightness.

CAN Bus Functionality

The CAN bus is used both to receive data from ECUs supporting CAN bus (LINK, ECUMASTER, STEALTHPCM, MAXXECU, MEGASQUIRT3, SPTRONIC, ABIT) and to connect additional modules that convert analog signals to CAN bus signals. This allows three usage scenarios:

1. Dashboard connected to ECU via CAN bus: Displays data transmitted by the ECU.
2. Dashboard connected to both ECU and analog signal converter via CAN bus: In the dashboard settings menu, the source for each parameter can be chosen between the ECU and the converter. For instance, the water temperature can be read from the ECU, while the oil temperature can be read from an additional sensor connected to the converter. The converter can also integrate standard vehicle sensors (fuel level, turn signals, headlights, etc.) into the dashboard.
3. Dashboard connected only to analog signal converter: This is used when the ECU does not support the CAN bus. All necessary sensors connect to the converter, similar to the operation of the DEFI ZD. Only a pulse signal from the ECU is used for the tachometer.

Main Display Parameters

• Tachometer: Data is read from the ECU via CAN bus or from the analog converter’s standard tachometer signal (negative control). Calibration is possible depending on the number of cylinders.

• Speedometer: Data is read from the ECU via CAN bus or from the analog converter’s pulse signal. Arbitrary calibration is possible. A 10 Hz external GPS receiver can also be used. With a GPS receiver, a closed path with speed color coding can be drawn.

• Coolant Temperature (CT): Data is read from the ECU via CAN bus or from the analog converter. Supports DEFI (original and Chinese), DEPO (S3747-JPN), AEM, BOSCH, BMW sensors. Arbitrary calibration is not supported. Additional sensors can be added if a resistance-temperature calibration table is available.

• Engine Oil Temperature: Same as coolant temperature.

• Transmission Oil Temperature: Same as coolant temperature.

• Engine Oil Pressure: Data is read from the ECU via CAN bus or from the analog converter. Supports any 0-5 volt pressure sensors (e.g., DEFI). Arbitrary calibration is possible.

• Fuel Pressure: Data is read from the ECU via CAN bus or from the analog converter. Supports any 0-5 volt pressure sensors (e.g., DEFI). Arbitrary calibration is possible.

• Differential Fuel Pressure: Calculated as the difference between intake and fuel pressures.

• Boost Pressure: Data is read from the ECU via CAN bus or from the analog converter. Supports any 0-5 volt pressure sensors (e.g., DEFI). Arbitrary calibration is possible.

• Intake Air Temperature: Data is read from the ECU via CAN bus or from the analog converter. Supports GM sensors (Matiz, Chevy Niva). Arbitrary calibration is not supported. Additional sensors can be added if a resistance-temperature calibration table is available.

• Exhaust Gas Temperature: Data is read from the ECU via CAN bus or from the analog converter. Supports any K-type thermocouples (e.g., DEFI, AUBER). No calibration required.

• Voltage: Data is read from the ECU via CAN bus or from the analog converter (measures the converter’s supply voltage).

• Lights and Indicators: Data is read only from the analog converter for low beam (positive), high beam (positive), turn signals (positive), parking brake (ground), check engine (ground), oil pressure lamp (ground), and generator lamp (ground).

• Fuel Level Sensor: Data is read from the converter using standard resistive float-type fuel level sensors (0-1000 ohms). Two-point calibration (empty and full tank) is supported.

• Odometer: Distance calculation is based on any speed signal.

• Mixture: Data is read from the ECU via CAN bus or from the analog converter (0-5V analog input).

• Desired Mixture: Data is read from the ECU via CAN bus (not for all ECUs).

• Knock Level: Data is read from the ECU via CAN bus (not for all ECUs).

• Ignition Timing: Data is read from the ECU via CAN bus (not for all ECUs).

• Ignition Timing Retard: Data is read from the ECU via CAN bus (not for all ECUs).

• Mixture Correction: Data is read from the ECU via CAN bus (not for all ECUs).

• Current Gear: Data is read from the ECU via CAN bus (not for all ECUs).

• Airflow and Calculated Engine Power: Parameters are calculated only if injection pulse data is available.

• Injection Pulse: Data is read from the ECU via CAN bus (not for all ECUs).

• Injector Duty Cycle: Calculated only if injection pulse and RPM data are available.

• Cylinder Knock Level: Data is read from the ECU via CAN bus (not for all ECUs).

• Tire Pressure: A special CAN module and two types of tire pressure sensors (external and internal) are used to display tire pressure data.

• Alerts and Warning Log:

  • Tachometer: Set yellow and red RPM zones, influencing the behavior of some needle tachometers and shift lamps.
  • Speedometer: Set a speed threshold after which the speed digits change color from white to red.
  • Coolant Temperature: Set a threshold, and if exceeded, a pop-up window with the current temperature value and an audible signal appears. Each trigger is logged (time and value).
  • Oil Temperature: Same behavior as coolant temperature.
  • Engine Oil Pressure: Set 5 oil pressure values for different RPMs. If oil pressure drops below the threshold for the current RPM, a pop-up window and an audible signal appear. Each trigger is logged (time, RPM, oil pressure value).
  • Exhaust Gas Temperature: Set a threshold, and if exceeded, a pop-up window with the current temperature value and an audible signal appears. Each trigger is logged (time, temperature, RPM, boost, ignition timing, mixture).
  • Voltage: Set a lower voltage threshold for the running engine. If voltage drops below the threshold, a pop-up window appears.
  • Fuel Level: Set a lower fuel level threshold. If fuel level drops below the threshold, a pop-up window appears.
  • Current and Desired Mixture: Set a maximum deviation of the current mixture from the desired mixture. Works only with boost values over 0.1 bar and if the ECU transmits current and target mixture data. Each trigger is logged (time, RPM, boost, ignition timing, current mixture, desired mixture).
  • Ignition Timing Retard: Set a maximum ignition timing retard value. If exceeded, a pop-up window and an audible signal appear. Each trigger is logged (time, RPM, boost, ignition timing, retard, current mixture).

Logger

Logging of main engine parameters occurs automatically. Recording starts when both engine RPM and intake manifold pressure exceed the set limits. The limits are set in the LOG-SETTINGS menu. Recording stops if one of these parameters drops below the set limit.

The log is displayed as a graph with up to 4 parameters simultaneously, with several parameter layouts available. Navigation left-right is done by rotating the joystick knob, and zooming is done by pressing left-right. All recorded parameters are displayed in text form in the top row. When moving the current position marker, the corresponding values are shown in the top row.

When the ignition is turned off, the recording (all saved data since the dashboard was turned on) is saved to the internal storage in the ARCHIVE section. The archive stores the last 10 recordings. If a GPS receiver is available, the recording’s name includes the date, time, and duration in seconds.

The archive can be copied to a USB flash drive as CSV files for viewing in megalogviewer or similar software.

Peak Values

Peak values are determined for main parameters and can be reset either by pressing the joystick up in the peaks window or when the dashboard is turned off.

If data on the current gear and intake manifold pressure is available, peak pressure values are graphed as RPM-pressure coordinates for each gear.

If data on cylinder-specific knock levels is available

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