obd2cartool.com Tech-2-User-Guide
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SECTION VIID<br />
CANDI MODULE<br />
CANdi Module<br />
This section applies only to GM vehicles equipped with the new GM LAN/CAN (General Motors<br />
Local Area Network/Controller Area Network). Please disregard this section if your dealership<br />
currently does not have any vehicles supported by this application.<br />
GM vehicles use class 2, low-speed (10.4 K baud rate) systems. A limited number of vehicle platforms<br />
(e.g. Saturn Ion, Cadillac XLR) are equipped with the new GM LAN/CAN system. This type of application<br />
has a single-wire CAN bus for body controls, a medium-speed CAN bus for information and entertainment,<br />
and a high-speed CAN bus for powertrain (OBD II <strong>com</strong>pliant modules). A new diagnostic interface—the<br />
Controller Area Network diagnostic interface (CANdi) has been developed to address these needs. The<br />
CANdi module (Figure VIID-1, Figure VIID-2) serves as an enhancement to the <strong>Tech</strong> 2 and <strong>com</strong>pletes the<br />
interface necessary to <strong>com</strong>municate with future on-board <strong>com</strong>puter systems.<br />
Figure VIID-1<br />
Controller Area Network diagnostic interface (CANdi) module<br />
Figure VIID-2<br />
Illustration of CANdi module showing wiring<br />
2005 <strong>Tech</strong> 2 <strong>User</strong>’s <strong>Guide</strong> VII - 67
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