Lotus - Exige GT - Workshop Manual - 2004 - 2007

Lotus ECU for Exige, Exige S, Exige Cup, Exige GT, Elise S, Elise R, 2-11 (Toyota) Model Year 04-07 Elise S, R – Exige, Exige S, Exige Cup, Exige GT – 2-11 – MY 04 – 07 Cluster 04 – 07 Protocol ECU Technical documentation Release 1.01 INTRODUCTION AIM has developed special applications for many of the most common ECUs: by special applications we mean user-friendly systems which allow to easily connect your ECU to our hi-tech data loggers: user need only to install harness between the logger and the ECU. Once connected, the logger displays (and/or records, depending on the logger and on the ECU data stream) values like RPM, engine load, throttle position (TPS), air and water temperatures, battery voltage, speed, gear, lambda value (air/fuel ratio), analog channels.. All AIM loggers include – free of charge – Race Studio 2 software, a powerful tool to configure the system and analyze recorded data on your PC. Warning: once the ECU is connected to the logger, it is necessary to set it in the logger configuration in Race Studio 2 software. Select Manufacturer “Lotus” Model “CLUSTERS 04-07”. Refer to Race Studio Configuration user manual for further information concerning the loggers configuration. 1 www.aim-sportline.com Elise S, R – Exige, Exige S, Exige Cup, Exige GT – 2-11 – MY 04 – 07 Cluster 04 – 07 Protocol ECU Technical documentation Release 1.01 3 1 – Car Models Lotus Clusters 04-07 protocol is used as stock on the following car models (Model Year 04 -07): • • • • • • • 0 Elise S Elise R Exige Exige S Exige Cup Exige GT 2-11 2 – CAN communication Setup Lotus ECU is equipped with a CAN communication protocol used to communicate parameters to a data logger. The CAN bus is available on OBDII diagnosis connector, on the 12 pins connector placed back on the stock dashboard or on the ECU. The image here below shows the standard CAN communication setup used to connect the ECU with AIM loggers. LOG CAN+ LOG CAN- Cable labelled CAN + Cable labelled CAN - AIM LOGGER 1 4 ECU CAN+ ECU CAN- ECU 3 – Connection to AIM loggers 3.1 – Connection through the OBDII plug To connect OBDII with AIM loggers connect AIM cable labelled CAN+ to pin 6 and cable labelled CAN- to pin 14 of the OBDII connector. OBDII supplies also external power to the logger. VBatt (+12V) is on pin 16 and chassis GND on pin 4. OBD is not powered by the vehicle master switch, so if AIM logger is connected to OBD for a long time the battery runs down. 2 www.aim-sportline.com Elise S, R – Exige, Exige S, Exige Cup, Exige GT – 2-11 – MY 04 – 07 Cluster 04 – 07 Protocol ECU Technical documentation Release 1.01 The CAN communications works only if the dashboard is switched on. 5 3.2 –Connection through the stock dashboard To receive data coming from the ECU through the stock dashboard connect AIM cable labelled CAN+ with pin 1 (red wiring) and AIM cable labelled CAN - with pin 7 (blue wiring) of the 12 pins connector placed back on the stock dashboard. The power supply of MXL can be obtained through the other connector placed always back of the original dashboard. 3 www.aim-sportline.com Elise S, R – Exige, Exige S, Exige Cup, Exige GT – 2-11 – MY 04 – 07 Cluster 04 – 07 Protocol ECU Technical documentation Release 1.01 In case of permanent installation it is necessary to check which cable of the second connector is powered by the master switch. With reference to the below image the cables to check are the green and the purple one. 2 4 – Lotus Clusters 04 – 07 communication protocol Channels received by AIM loggers connected to Lotus ECU are: ID CHANNNEL NAME FUNCTION ECU_1 CU_SPEED SPEED ECU_3 CU_RPM RPM ECU_4 CU_FUEL_IST Instant fuel ECU_5 CU_FUEL_AVG Average fuel ECU_6 CU_ENGT Engine temperature ECU_7 CU_SF_LIGHT Shift Light ECU_8 CU_MIL_LIGHT Malfunction Indicator Light ECU_11 CU_OIL_LIGHT Low Oil Pressure Light ECU_13 CU_TC_LIGHT Traction Control Light 4 www.aim-sportline.com