Bank 1

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: EC-O2S2B1-01 - Wiring Diagram

Courtesy of NISSAN MOTOR CO., U.S.A.

Specification data are reference values and are measured between each terminal and ground.

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

ECM INSPECTION TABLE (BANK 1)

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
25	P/B	Heated oxygen sensor 2 heater (Bank 1)	[Engine is running] Engine speed: Below 3, 600 rpm after the following conditions are met Engine: After warming up Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load	0 - 1.0V
25	P/B	Heated oxygen sensor 2 heater (Bank 1)	[Ignition switch: ON] Engine: Stopped [Engine is running] Engine speed: Above 3, 600 rpm	BATTERY VOLTAGE (11 -14V)
74	L	Heated oxygen sensor 2 (Bank 1)	[Engine is running] Revving engine from idle to 3, 000 rpm quickly after the following conditions are met Engine: After warming up Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load	0 - Approximately 1.0V
78	B/W	Sensor ground (Heated oxygen sensor 2)	[Engine is running] Warm-up condition Idle speed	Approximately 0V