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Auxiliary digital Inputs

Wire colour for auxiliary input

1: Yellow/Black

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All STINGER 4 ECUs has 1 digital input. The input can be programmed to be active when grounded or when pulled up to more than 5 volts. The management software is used to program the input for different functions. For example, it can be used to increase the idle speed if the air conditioner is turned or to adjust the fuel and ignition for nitrous oxide injection, etc.

Note: If you are using the digital input then you must ensure that the input wire is either grounded via a 500 Ohm resistor or held at more than 5 volts via a 500 Ohm resistor. In the example shown below there is no need to ground the input via a resistor because it is already grounded through the coil winding of the gas solenoid. When the gas solenoid is activated the input wire will read a voltage greater than 5 volts and enable the nitrous function in the ECU.

Example of nitrous oxide control

Stinger 4 instruction manual version 2.0

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