Auxiliary Output Wiring

G4X ECUs have up to 16 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. Certain Auxiliary Output channels can only be used with certain Functions, the table below is useful when planning which Function to allocate to each Auxiliary Output channel.

Function	A1-A4	A5-6*	A5-6	A7-8	A9-10	A11-16	Inj1-8	Ign1-8	VA1-8
AC Clutch
Anti Lag Solenoid
CE Light
Chassis Power Relay
Cruise Light
ECU Hold Power
Engine Fan1-3
Fuel Pump Relay & Speed Relay 1 & 2
gearshift blip solenoid
GP Output 1-8
IC Spray
Purge
Starter Solenoid
traction light
EThrottle Relay
Boost Solenoid
Fuel Pump PWM
GP PWM 1-8
ISC Solenoid 2 wire
Shift Light
Speedo Out
Tacho
VVT Solenoid (Including VANOS)
ISC Solenoid 3 wire
External Ethrottle
CL Stepper/Rotary Oil Pump
ISC Stepper
Rotary Oil Pump
Internal Ethrottle
TGV

*Monsoon

The following conditions also apply.

·All Auxiliary, Ignition and Injection outputs can switch a load by supplying a ground for it.

·Aux 5 to 8 can be used as high side drives (ie they can supply power to a load) (this isn't available on the Monsoon).

·Ignition and Injection outputs don't have internal fly-wheeling diodes and so it is recommended to install an external fly-wheeling diode when controlling solenoids using PWM with these outputs.

·Ethrottle and 3 wire ISC Solenoid Outputs are restricted to specific pairs of pins, refer to the actual settings themselves to see the available options.

Auxiliary Outputs are normally used to supply a GROUND to actuate solenoids, relays, LEDs or lights. The amount of current flow is entirely dependant on the internal resistance of the device connected to a drive. The load must not draw more than 2 Amps. This means that a directly connected load should have a resistance exceeding 7Ω. If the resistance is lower than this a relay should be used. DO NOT connect +12V directly to any auxiliary output.

The following list shows only some of the devices that can be controlled by Auxiliary Outputs

·Idle Speed control (ISC) Solenoids and Stepper Motors

·Boost Control Solenoid

·Fuel Pump Relay

·Fuel Pump Speed controller

·Engine Fan Relay

·A/C Clutch Relay

·A/C Fan Relay

·Inter-cooler Spray Pump Relay

·Tachometer

·Check Engine Light

·Purge and EGR Solenoids

·Variable Valve Timing Solenoids

·Speedometer

·Oxygen Sensor Heater

·Water Injection

·Nitrous Oxide Injection

·Electronic Throttle Control

·General Purpose Switching

·General Purpose Pulse Width Modulation (PWM)

G4X Auxiliary Output Specifications:

·1.5k Ohm Internal Pull-up Resister

·Auxiliary Drive Low 2A over-current protected

·Open Collector (fly-wheeled) in auxiliary output mode.

·Aux 5 to 8 High Side Drive (ISC Stepper Mode) 0.5 A. (Monsoon has Aux 5&6 but they are low side only)

·Aux 9 and 10 (only on: Xtreme, Fury, Storm and selected Plugin ECUs) Push-Pull drive 4/4 A.