This function is used to see how the control unit compensates the fuel quantity for each cylinder and if any cylinder deviates from the other.
Normal fuel quantity is 0.
A positive deviation means that more fuel per stroke is injected into the cylinder, compared to normal fuel quantity. A negative deviation means that less fuel per stroke is injected into the cylinder, compared to normal fuel quantity.
It is normal that the injected fuel quantity into each cylinder, isn't exactly the same. As long as the engine runs smoothly, it is probably nothing wrong with the engine or the injection system, despite a deviation.
Do not activate white smoke limiter or exhaust brake during the test, they give incorrect values.
The engine speed must be between 450 and 1600 rpm.
Condiţii de derulare test:
Coolant temperature above 60 °C.
A dialogue box shows the data lists. Check that the coolant temperature exceeds 60°C and then press "OK".
Data lists presents the values for each cylinder in real time, press "OK".
The function is complete.
If the function fails, check the test conditions and repair any faults.