Our ELM327 is the only product that supports all of the standard OBDII protocols, but you may not need that many. To help you decide which chip to buy, we offer the following chart:
............................ 320 .. 322 ..323 ..325.. .327... ......329
SAE J1850-PWM.......X ...............................X
SAE J1850-VPW................X.........................X
ISO 9141-2............................. X...............X
ISO 14230-4 (slow)...................X...............X
ISO 14230-4 (fast)....................X...............X
ISO 15765-4 (CAN).....................................X....... ......X
SAE J2411 (SWCAN)....................................X...... .......X
KW1281 (SAE J2818)
SAE J1939 (250kbp.....................................X..... ........X
SAE J1939 (500kbps)..................................X...... ........X
SAE J1708 (J1587).............................X
SAE J1708 (J1922).............................X
получается что 325-м можно КАТы и кучу других марок смотреть....включая строительную...
А 329-м и камминс возьмёт!..
http://www.elmelectronics.com/obdic.html