Glossary

Glossary

AVI

Analogue Voltage Input - An input to the ECU that is varying in voltage from 0-5v.

SPI

Synchronised Pulsed Input - A digital or reluctor input to the ECU that is varying in duty and/or frequency. Can be either 0V, 5V or 12V only.

DPO

Digital Pulsed Output - A digital output from the ECU that is varying in duty and/or frequency. Can be either 0V, 5V 8V 12V only.

Crank (Trigger)

Trigger Input - An engine position input that usually has one pulse per cylinder event or greater.

Cam (Home)

Home Input - An engine position input that usually has one pulse per engine cycle or greater.

OBPS

On Board Pressure Sensor - A pressure sensor that is internal to the ECU.

DBW

Drive By Wire

    • Related Articles

    • Reluctor Sensor Types

      Variable Reluctance Transducers (VRT or simply reluctor) – this kind of sensor produces a sine wave output. Generally a VRT sensor will have only 2 wires (a third wire may be present but its generally a shield wire to help protect the signal from ...

    • Copy Through Feature

      Note The Copy Through feature only applies to patch harness ECU's that work in conjunction with the factory ECU. The copy through feature allows the Haltech ECU to output the factory ECU's fuel and ignition timing values, wherever the user specifies. ...

    • Inserting and deleting Axis Points

      Tuning table axis points can be added and removed by using the 'Ins' & 'Del' keys. New axis point To insert a new axis point, select the 'Ins' key. An insert dialog will appear. If axis points are available, it will allow you to insert a row or ...

    • Increasing and decreasing cell value

      Once a cell selection has been made, its value can then be changed. The following is how cell values can be changed. Cell values can be increased by using the 'Page Up' key. Cell values can be decreased by using the 'Page Down' key. If smaller ...

    • Currently used cell

      When the engine is running, the ECU will be using values from the tuning table. The value currently being used by the ECU is indicated by the reference marker. At any point, you can align your currently selected cell/s with the cell/s the ECU is ...