F3: Check For O2 Sensor Heater Continuity

Ignition switch to position 0
Disconnect EM023

Bracket on top of gearbox or Bulkhead rear of engine

Measure the resistance between EM023/001 and EM023/002.

- Is the resistance between 4 and 10 ohms?
Yes
GO to F4 F4: Check For O2 Sensor Failure
No
Renew O2 sensor. Reconnect plug(s).
GO to F8 F8: Stop