B5: Check Harness Short to Ground

With EM010, EM020 & EM007 disconnected, measure the resistance between EM010/009 & ground EM1AL (EM2AL)

Repeat for EM020/008 & ground EM1AL (EM2AL)

> 10M ohms?

Yes
Go to B6 B6: End

No
Inspect EM010 & EM020 for corrosion, bent/pushed back pins or locate & repair the harness/splice EMS41. Test the system for normal operation.