DTC P0139 Ho2S2: Wiring Diagram

Fig 1: Wiring Diagram - EC-HO2S2-01

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

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

Pulse signal is measured by CONSULT-III.

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.

TERMINAL ITEM CONDITION CHART

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
5	B/W	Heated oxygen sensor 2 heater	[Engine is running] 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	Courtesy of NISSAN MOTOR CO., U.S.A.
5	B/W	Heated oxygen sensor 2 heater	[Ignition switch: ON] Engine stopped [Engine is running] Engine speed: Above 3, 600 RPM	BATTERY VOLTAGE (11 - 14V)
50	G	Heated oxygen sensor 2	[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
59	B/Y	Sensor ground (Heated oxygen sensor 2)	[Engine is running] Warm-up condition Idle speed	Approximately 0V
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)