Rear Heated Oxygen Sensor Heater

COMPONENT INSPECTION
Rear Heated Oxygen Sensor Heater.
Check the following.




1. Check resistance between terminals (4) and (1).

Resistance: 2.3 - 4.3 Ohms at 25°C (77°F)

2. Check continuity.

Terminal No. / Continuity
(2) and (1),(3),(4) / No
(2) and (1),(2),(4) / ___

If NG, replace the rear heated oxygen sensor.

CAUTION: Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.