6-IN-1 EOL OBD Diagnostic Calibration Tool Engine Scanner Detector for WeiChai

(4)## Notice: SHACMAN Auto's cars use Weichai engines, but the definition of the needle angle of Sinotruk and Weichai OBD is different. Sinotruk uses the 6/14 communication protocol 1939, while Weichai uses the 1/9 communication protocol 1939.