Aim GEMS Omex 100 User manual

AiM User Guide
GEMS
Omex ECUs
Release 1.01

2
1
Supported models
This document explains how to connect AiM devices to the Engine Control Unit (ECU) datastream.
Supported models are:
•GEMS Omex 100
•GEMS Omex 150
•GEMS Omex 200
•GEMS Omex 500
•GEMS Omex 550
2
Wiring connection
The ECU connector is made of four sections: “A”, ”B”, ”C” and “D”, is so characterised. GEMS OMEX
connector is shown below:
Connector pin
Pin function
AiM cable
C1
RS232 TX
RS323 RX/ECU RS232 TX
A13/A26
Ground
Ground
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 RXpin (if indicated in the connection table above)

3
3
Race Studio configuration
Before connecting AiM devices to the ECU, set all functions using AiM software Race Studio. The
parameters to select in the AiM device configuration are:
•ECU manufacturer: GEMS
•ECU Model: Omex (Only RS2)
4
“GEMS – Omex” protocol
Channels received by AiM devices configured with “Gems – Omex” protocol are:
CHANNEL NAME
FUNCTION
GEMS_ENGINE_SPD
RPM
GEMS_LOAD
Engine load
GEMS_TPS
Throttle position sensor
GEMS_AIRTEMP
Intake air temperature
GEMS_COOLTEMP
Water temperature
GEMS_BATTVOLT
Battery voltage
GEMS_ACCFUEL
Acceleration fuelling
GEMS_RESULT
Gems result
GEMS_ADV2
Ignition advance#2
GEMS_ERROR
Gems error signal