When a technician is using a Tech 2 they are automatically notified for the need of the CANdi module by a message on the screen of the Tech 2.  The CANdi module will be needed on 2005 & later GM vehicles & 2006 & later Isuzu commercial vehicles when two or more vehicle computers (ECM, TCM, BCM, ABS) are communicating.   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.