A3: 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

- Is the coil resistance > 80 ohms ?
Yes
GO to A5 A5: Check Harness Continuity
No
GO to A4 A4: Check Current Drawn