Link ECU Online Manual
12
© 2024 Link Engine Management Ltd
1.4.2
IAT Sensor
It is highly recommended that an IAT sensor be fitted in all applications to provide an input for correction of
fuel and ignition based on the engines air charge temperature.
An IAT sensor should be fitted in the intake system in a location that accurately represents intake
temperature. The most common location is just prior to the throttle body. Installing in the manifold is not
recommended due to heat soak issues. A fast response sensor must be used in all forced induction
applications.
1.4.2.1 WRXLink (04), WRXLink (07) & WRXLink (11)
Some STI’s have a factory fitted IAT sensor near the throttle body, if your car has this it is suitable for use as
is. This STI sensor is connected to AN Temp 3.
The AFM has a factory fitted IAT sensor. Due to its location this sensor is not suitable for tuning. A suitable
IAT sensor can however be wired to the AFM wiring. The AFMs IAT signal is wired to An Temp 2. Factory
AFM wiring information follows:
1 +14V
2 Ground
3 Mass Air Flow Meter (Typically An Volt8)
4 Intake Air Temperature (An Temp 2)
5 Ground
Note: It is important that the factory IAT sensor is completely disconnected as not to affect the after market
IAT sensor signal.
An IAT sensor can also be wired in using any spare An Temp or An Volt pin (several are available on the
expansion connectors). Note spare An Volt channels require a pullup resistor (to +5V) to be added for
temperature input use.
1.4.3
E-Throttle Output
1.4.3.1 WRXLink (04), WRXLink (07) and WRXLink (11)
This vehicle has E-Throttle from factory.
The E-Throttle Output pins are Aux 9 & 10 and the E-Throttle Relay is Aux Ignition 8. If the E-Throttle is found
to be operating in the wrong direction this can be rectified by changing the Aux 9 Active State (Electronic
Throttle -> E-Throttle 1 -> E-Throttle Setup or by swapping the +ve and -ve pins at the throttle plug.
1.5 Expansion Connector
Expansion connectors are provided to allow easy connection of additional ECU inputs. An “expansion cable”
can be purchased from your Link dealer.
Important points when wiring to the expansion connector:
·
Do not overload the +5V Out pin. Although this is protected against ECU damage the +5V out signal also
provides power for other sensors.
·
Do not connect the ground pin to chassis ground. This could cause ground loops and introduce
unnecessary interference. Use this pin only to ground external sensors that are isolated from chassis
ground.
The Expansion connectors available for each ECU can be found under the Pinouts Section.
To Next Page
Loading...