X-90 (2WD) L4-1591cc 1.6L SOHC MFI (1997)
/l4-1591cc_1.6l_sohc_mfi/Page-578001.png)
Voltage Signal: Description and Operation
The fuel injector is driven by its solenoid coil based upon the ECM output signal.
There is some delay called as "Ineffective injection time", which doesn't provide fuel, between ECM signal and valve action.
As the ineffective injection time depends on the battery voltage, ECM takes voltage information to compensate it in fuel injection time.
