& KPro4 only)
The ground pins on the analog input
connector are connected directly to the ECU ground plane. The KPro and/or ECU will be damaged if power is applied to
these pins or a sensor sinks a lot of current to
ground through the ground pins. The analog ground should only be
connected to sensor grounds that are either dedicated analog grounds or sink
very low current (<1mA). Never connect a wideband to the analog
ground! The o2 sensor heater will sink far too much current.
III & KPro4 have eight 0-5V analog inputs located on the KPro board. These may to datalog and record additional
To edit analog inputs, select the
analog input from the Analog Inputs list.
Built in conversions for common
inputs are available, or a custom conversion may be selected.
A voltage offset may be used to
correct the voltage at sensor to the voltage as read by the ECU.
However, the use of a non zero voltage offset
indicates a ground voltage difference, which should be fixed rather than
using an offset to compensate for the voltage difference. The ground
voltage difference will not tend to be constant, as different ground current
flows change the ground potential.
To reduce the ground voltage difference take care where the sensor device ground is
connected to the vehicle wiring. If the sensor device (eg a wideband controller) has an
analog ground output, connect this to one of the ground pins on the KPro analog input connector. If the sensor device does
not have an analog ground output, then the sensor device output voltage will
vary with the current the sensor device is using. To minimize this effect,
use a heavy gauge wire for the ground, shorten the sensor device ground wire
to the minimum necessary and ground the sensor device to the same place as
the ECU master ground – normally on the intake manifold.
Sets the amount of smoothing applied
to the input. An exponential moving average is used for smoothing.
Custom voltage conversions may be
entered here. Note that temperature units are always in degrees
Celsius, pressure units are always in bar, air/fuel is always in lambda
Kpro Analog Input Configuration from Hondata.com: https://www.hondata.com/help/kmanager/index.html?analog_inputs.htm