B14: Heated O2 Sensor Screen Ground Continuity

With EM012 and EM021 disconnected, measure the resistance between EM012/022 and EM021/004.

Is the resistance < 0.5 ohms?

Yes
GO to B15, B15: Check For Short to B+

No
Inspect connectors EM012 and EM021 for corrosion, damaged/pushed back pins.
Inspect harness/splice EMS08 for damage. Repair as necessary and reconnect plug(s).
GO to B19, B19: End