B2: Check Stepper Coil Open Circuit

With EM012 disconnected measure the resistance between the following pairs:
EM012/001 and EM012/003
EM012/002 and EM012/004

- Any coil resistance > 80 ohms?
Yes
Renew EGR valve and test the system for normal operation
No
GO to B3 B3: Check Current Drawn