Locate the car’s OBD2 socket which will be within 60cm (2ft) of the steering wheel. Insert the CAN-Bus Signal Converter then start the engine. If this is the first time the CAN-Bus Signal Converter has been installed then it may take a short while for it to interrogate the car’s CAN-Bus network and synchronize to the correct protocol. This will be indicated by a Red LED. Once the correct protocol has been determined then engine data will be extracted from the CAN-Bus network and converted into output signals. This will be indicated by a flashing Green LED.
RPM (Blue wire)
– This is a 12v square wave signal where the frequency increases with engine speed. The signal outputs 2 pulses per crankshaft revolution
SPEED (Green wire)
– This is a 12v square wave signal where the frequency increases with road speed. The output frequency is approximately 2500 pulses per kilometer (1570 pulses per mile).
ENGINE RUNNING (Grey wire)
– This signal remains high (+12v) when the engine is stationary and is driven low (0v) when engine speed exceeds 350RPM.
VEHICLE TRAVELING (Yellow wire)
– This signal remains high (+12v) when the car is stationary and is driven low (0v) when road speed exceeds 9 Km/h (6mph).