KMS IB/IA23, Manual

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KMS IB/IA23 manual
Version 3.01 9
3.2.4.3 Engine-load sensor
The engine load sensor connected to the system will have to be calibrated.
The range within which the sensor operates can be set here. A load sensor issues a voltage of 0 to
5V. The range is divided into 8 bits (256 steps). In practice a load sensor does not run through its
full range. For this reason, the upper and lower limits must be set, so that the 16 columns in the
spreadsheets can be best utilised.
There are two ways of calibrating the load sensor:
1) Automatic calibration
2) Manual calibration
When a throttle valve potentiometer is used, it is easy to opt for automatic calibration. Select
'Automatic cal.' and then keep the throttle valve in rest position, pressing OK.
Then turn the throttle valve to full load and press OK again.
The minimum and maximum values of the throttle
positions will now be shown.
A warning will appear if automatic calibration
cannot be finished correctly. For possible causes,
see 'Fault tracing'.
When a map sensor or an air mass sensor is used,
automatic calibration is not easy, because the
minimum and maximum output signals of the sensor are not known before the engine has run. We
recommend filling in the figures by hand, making sure that the output signal of the sensor under any
engine operating condition is between the two figures set. Tip: make the minimum value 15 and the
maximum value 250.