SECTION VIID CANDI MODULE
2005 Tech 2 User’s Guide VII - 68
Basic Operation
The CANdi is an in-line cable module that works with existing Tech 2 components including the VCI,
cables and adapters. Installed, the CANdi module is fully compatible with current and past Tech 2
software. The module powers up in a way that makes it transparent to the user. This allows the existing
Tech 2 software to be used with no changes when the CANdi module is installed. If a vehicle requires the
use of a CANdi module, the Tech 2 will enable features specific to the module.
The primary function of the CANdi module is to add CAN (controller area network) capability to the Tech 2.
The following list summarizes the basic characteristics of the CANdi module:
Supports simultaneous communications on three CAN buses
Provides high-speed UART communications with the Tech 2
The Tech 2 controls CANdi module operation. When installed, the CANdi module does not interfere with
any diagnostic procedure currently performed by the Tech 2. Use of the module does not require any
physical changes to the Tech 2, cables, or adapters. The module operates transparently until activated by
the Tech 2. Upon activation, the CANdi module operates under control of the Tech 2. Tech 2 application
software loaded on the Tech 2 PCMCIA card determines all functionality.
IMPORTANT
When functioning properly the CANdi’s LED will flash. If a problem occurs, the LED will be constantly
illuminated. If the module’s light is constantly illuminated, refer to the troubleshooting section in this
manual.
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