B14: Heated O2 Sensor Screen Ground Continuity

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

Is the resistance < 0.5 ohms?

Yes
Go to B15

No
Inspect connectors EM012, & EM021 for corrosion, damaged/pushed back pins or repair the harness, reconnect plug(s)
Go to B19