Note: For information on wiring Injection Outputs as additional Auxiliary Outputs, refer to the section on wiring Auxiliary Outputs.
The injector drives on a G4X ECUs work by supplying an EARTH to turn the injectors on. A switched (key ON) 12V must be supplied to the other terminal of the injector. The polarity of the injector is not important. Note that injectors should be powered from the same supply as the ECU. This ensures the ECU has accurate measurement of injector voltage for calculating injector dead time.
WARNING! |
DO NOT connect +12V directly to any of the injector drives |
Injectors are commonly available as either high impedance or low impedance. To determine injector impedance: With the injector unplugged, use an ohmmeter to measure the resistance across the two terminals of the injector;
·If the injector resistance is greater than 6 Ω then the injectors are high impedance and no ballast resistors are required,
·If the injector resistance is less than 6 Ω then ballast resistors will be required.
G4X Injection Specifications:
·Max Saturated Injection or Auxiliary Output Current = 5 A (unprotected)
·Open Collector (not fly-wheeled) in auxiliary output mode.
See also: