B13: Check For Heated O2 Sensor Continuity

With EM012 & EM021 disconnected, measure the resistance between EM012/015 & EM021/003

Is the resistance < 0.5 ohms?

Yes
Go to B14

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