Mini R53 User Manual download pdf (Page 11)

Additional Sensors 11

Additional Sensors

G4 Plug-In ECUs offer various options for the installation of additional sensors and devices. As a minimum it

is recommended that all ECUs are installed with a Manifold Absolute Pressure (MAP) sensor and Intake Air

Temperature (IAT) sensor. These parts can be purchased if required from your nearest Link dealer.

4.1 Expansion Connector

The expansion connector is provided to allow easy connection of additional ECU inputs. An “expansion cable”

needs to 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.

4.1.1

BMW Mini Cooper S R53

The following expansion connector inputs/outputs are provided:

Aux1 Auxiliary Output

DI8 Digital Input

DI9 Digital Input

An Temp 3 Temperature sensor input

An Temp 4 Temperature sensor input

An Volt 10 Analogue 0-5V input

An Volt 11 Analogue 0-5V input

+5V Out Low Current +5V Supply

GND Sensor Ground Only

In order to install an expansion cable to the ECU a 10 mm diameter hole will need to be drilled in the ECU

case. Remove the top half of the ECU case from the ECU when drilling the hole. See the photo below for

details on where to drill the hole. Also shown in the photo is the location for a CAN cable to be connected to

the ECU. If installing a CAN cable, unscrew the ECU case halves, remove the rubber bung and then run the

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Mini R53 User Manual Page 11