I tried to read BMW CAS4-1L15Y ECU with original Xhorse VVDI Prog ecu programmer, but failed. Then I followed the VVDI-prog factory instruction,still failed to read it. So i contact obdii365.com engineer for help. It worked 100%.
Here is the final solution:
Take off the component between GND-C and CLK IC circuit. It will read.
Engineer’s suggestion:
1- check you wiring
Group 1:
GND – black line
VCC – red line
Group 2:
BKGD – purple line
RESET – yellow line
XCLKS – green line
Group 3:
GND-C – black line
CLK – gray line
Note: DON’T lengthen the CLK line and GND-C line.
Attached file:
Wiring instruction for MC9S12 reflash cable
http://xhorse-vvdi.blogspot.com/2016/05/vvdi-prog-failed-to-read-bmw-cas4-1l15y.html
