VEMS Ground is Ec36 Pin05,Pin21,Pin22,Pin26,Pin32. Connected on Vems Harness to common ground no need to worry about it. Warning!!!!! Ec18 Pin17 was left out by Vems - no ground wire for that in the Vems harness (I made my own and joined it to common ground)
VEMS Ground is Ec36 Pin05,Pin21,Pin22,Pin26,Pin32. Connected on Vems Harness to common ground no need to worry about it.
Ec18 Pin17 is 2nd WBO2 heater (when ECU is ordered with dual WBO2) so EC18/17 is intentionally NOT connected to other grounds in generic v3 harness
* EC18/17 not connected to ground, but when ECU has single WBO2, it is allowed to connect to other grounds, or use it to activate inputs (wheelspeed/wheelspeed2, HALL type third trigger, analog input) or analog input reference