Component Inspection

WARNING: This page is about a different car, the 2011 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HEATED OXYGEN SENSOR 2 (HO2S2) HEATER

Turn ignition switch OFF.
Disconnect HO2S2 harness connector. Refer to "EXPLODED VIEW ".
Check resistance between HO2S2 terminals as follows.

TERMINAL RESISTANCE REFERENCE CHART

Terminal	Resistance
2 and 3	3.4 - 4.4 Ω [at 25°C (77°F)]
1 and 2, 3, 4	∞Ω (Continuity should not exist)
4 and 1, 2, 3	∞Ω (Continuity should not exist)

Is the inspection result normal?

YES: INSPECTION END

NO: GO TO 2.

REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning heated oxygen sensor 2.
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.
- Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial service tool).
INSPECTION END