U3: Harness Short to Screen

With EM010, EM011 PI006 & PI042 disconnected, measure the insulation resistance between EM011/014 & EM010/020
Repeat for EM011/014 & EM010/021
Repeat for EM011/014 & EM011/008
Repeat for EM011/014 & EM011/012
Repeat for EM011/014 & EM011/013
Repeat for EM011/014 & EM011/015
Repeat for EM011/014 & EM011/016

All resistances > 10M ohms?

Yes
Go to U4

No
Inspect EM010, & EM011 for corrosion, bent/pushed back pins or locate & repair the harness/connector PI001. Test the system for normal operation