Pro­blems with the USB con­nec­tion on the CBT2

Errors that occur can have the fol­lowing effects, among others :

  • The node list only par­ti­al­ly crea­ted
  • Uncon­trol­led ter­mi­na­ti­on of mea­su­re­ments
  • Pro­to­col moni­tor stops
  • Tes­ter disap­pears from the sta­tus bar and is reco­gni­zed short­ly after­ward

With the key com­bi­na­ti­on Ctrl-Alt‑O, you can open the debug win­dow. You may find hints for a faul­ty USB con­nec­tion the­re. Typi­cal error messages are :

[USB] Main - Command-Laenge ungueltig, Size = 1, SizeInv = 65535
[USB] Main - Command-CRC-Fehler, CID = 0x02, CRC = 0x0103, Size = 0

USB con­nec­tion pro­blems bet­ween PC and CAN-Bus Tes­ter 2 can have various cau­ses.

Plea­se check the tes­ter with ano­t­her USB cable. The ori­gi­nal USB cable from the case is a high qua­li­ty cer­ti­fied cable. Low-cost cables from dis­coun­ters can­not replace it.
USB exten­si­ons can cau­se pro­blems and should gene­ral­ly avoid.
If pos­si­ble, test the CBT2 on ano­t­her com­pu­ter. If the pro­blems do not occur the­re, you must look for a solu­ti­on at the pro­ble­ma­tic machi­ne. For examp­le, try a dif­fe­rent USB port or con­nect a USB hub bet­ween the com­pu­ter and the tes­ter.
Timing pro­blems in the gal­va­nic iso­la­ti­on of the USB port in con­nec­tion with older soft­ware ver­si­ons led to sta­bi­li­ty pro­blems of the USB con­nec­tion. Plea­se use a soft­ware ver­si­on from 4.7.8.2 with a modi­fied timing of the USB con­nec­tion.