U4: Check Harness Core to Core Insulation

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

- All resistances> 10 M ohms?
Yes
GO to U5 U5: Check Harness Signal Continuity
No
Inspect EM010, and EM011 for corrosion, bent/pushed back pins or locate harness/connector PI001. Repair as necessary and test the system for normal operation.