AiM Mercury 849849 AXX_New+FC12 ECUs

Mercury 849849 ECUs feature a serial communication protocol. To connect AiM device to these ECU a
dedicated AiM interface cable is needed. This cable part number is: X50EN849849. Here below it is
shown.

Mercury 849849 ECUs are equipped with a 4 pins AMP female connector that must be connected to
AiM interface male one shown here below.

Mercury 849849 AXX interface cable has four flying leads you can connect to AiM devices.
Please refer to your device pinout to know the pins to be used. Here below you find wiring diagram and connection scheme

Please note:
AiM wiring harnesses supplied after September 2018 have the following labels:
ECU RS232TX (white) to be connected to ECU TX pin
ECU RS232RX (blue) to be connected to ECU RX pin (if indicated in the connection table above)
AiM wiring harnesses supplied before September 2018 have the following labels:
RS232RX (white) to be connected to ECU TX pin
RS232TX (blue) to be connected to ECU RX pin (if indicated in the connection table above)

Race Studio configuration

Before connecting AiM devices to the ECU, set all functions using AiM software Race Studio. The
parameters to set in the device configuration are:
• ECU manufacturer Mercury
• ECU Model according to your ECU version or to its firmware version: 849849_Axx
849849_Axx_New FCR12

Available Channels

Channels received by AiM devices connected to “Mercury – 849849_Axx”, “849849_Axx_New” or
“FCR12” protocol are the same and here below they are listed: