Link G4 Storm - Ignition Outputs; Auxiliary Outputs

G4 Wiring and Installation Manual6
© 2009 Link
2.2 Ignition Outputs
The Xtreme offers eight independent ignition drives which can be used in a wide range of
configurations from a basic distributor set-up through to more complex multi-coil
arrangements. Unused ignition channels can be used for additional auxiliary outputs (simple
switching functions only). All direct spark, wasted spark and distributed ignition
configurations requiring up to eight channels are supported by the Xtreme
The same as above applies for the Storm however the Storm has four ignition outputs.
G4 Ignition Specifications:
· Ignition Drive High 20mA @ 5V
· Ignition Drive Low 2A over current protected
· Open Collector (not fly-wheeled) in auxiliary output mode.
2.3 AuxiliaryOutputs
G4 Wire in ECU's have eight general purpose auxiliary outputs. Unused ignition and
injection channels can also be used as auxiliary outputs. Auxiliary outputs are general-
purpose outputs that may be used to perform a wide range of functions. However, the
following limitations apply:
· A Three Terminal ISC Solenoid must be wired to Aux 1 and Aux 2.
· An ISC Stepper Motor must be wired to Aux 5, Aux 6, Aux 7 and Aux 8.
· Variable Valve Timing (VVT) solenoids must be wired to Aux 1 to 4.
· Aux 5 to 8 can not be Pulse Width Modulated (PWM) above 300Hz. Note that PWM
frequencies above 300 Hz may be required to drive a tachometer for a V8 above
4500 RPM.
· An electronic throttle motor must only be wired to Aux 9 (+) and Aux 10 (-).
· Spare Injection and Ignition channels when used as auxiliary outputs can only be
used as Auxiliary Outputs.
Auxiliary outputs supply an earth to switch loads such as a solenoid, relay, bulb or LED. All
auxiliary outputs may be used as a conditional switch that becomes activated at a certain
value (e.g. Honda VTEC), or for more complex control operations such as as idle speed
control and electronic boost control.
Loads may be connected directly to the auxiliary output without using a relay provided they
do not draw more than 2A of current. Essentially this means that a directly connected load
should have a resistance exceeding 7O. Refer to the section on wiring auxiliary outputs.
Some of the functions that may be performed by auxiliary outputs include:
· Fuel Pump Relay Switching (highly recommended for safety reasons)
· Engine Coolant Fan Relay Switching
· Electronic boost control using a boost control solenoid (uses PWM)
· Variable valve timing solenoid (e.g. VTEC)
· Warning / Check Engine Light
· Purge Control
· EGR Control
· Any function requiring an output activated by temperature, manifold pressure (MAP),
RPM, gear position, digital input state etc.
· Water Injection / nitrous oxide control (uses PWM)
· Inter-cooler Water Spray
· Air Conditioning Clutch / Fan
· General Purpose PWM