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Lotus Service Notes Section EMR
EMR.2 - CAN BUS DIAGNOSTICS; LOTUS TECHCENTRE
Controller Area Network (CAN) is an electronic standard to allow high speed communication between mod-
ules and controllers, via a serial data bus. The bus is a circuit linking the modules to the controller, consisting
of a pair of cables, twisted together to reduce electromagnetic interference, and carrying a square wave voltage
signal corresponding to '0's and '1's, coded in such a way as to identify and prioritise the individual messages.
On the Evora, CAN based systems include; engine management, safety restraint, anti-lock braking and related
features, instrument pack, and onboard diagnostics.
A 'stand alone' lap top PC loaded with 'Lotus Techcentre' software allows the CAN based serial data to
be read. A Vehicle Communication Device (T000T1472F) introduced for the Europa model is used to connect
the vehicle to the laptop Lotus Techcentre. Engine programming, live data display, diagnostics of engine, ABS
and airbag systems, are all carried out via the Lotus Techcentre.
The minimum specification of the laptop computer for installation of the Lotus Techcentre is as follows:
Processer 1.70 Ghz;
1 GB RAM;
40 GB HDD;
CDRW DVD ROM;
WIN XP PRO;
USB interface;
Ethernet or Wireless LAN
Note that this laptop should be dedicated totally to the Lotus Techcentre, with no other software in-
stalled.
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