DTC P0137 Ho2S2: Wiring Diagram

NOTE: For references to "PG-Power", see POWER SUPPLY, GROUND & CIRCUIT ELEMENTS article.

Fig 1: Heated Oxygen Sensor 2 - Wiring Diagram

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.

VOLTAGE REFERENCE CHART

TERMINAL NO.

WIRE COLOR

ITEM

CONDITION

DATA (DC Voltage)

Heated oxygen sensor 2 heater

[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.

Approximately 10V⁽¹⁾

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

[Ignition switch: ON]

Engine stopped

[Engine is running]

Engine speed: Above 3, 600 RPM.

BATTERY VOLTAGE (11 - 14V)

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

Sensor ground (Heated oxygen sensor 2)

[Engine is running]

Warm-up condition
Idle speed

Approximately 0V

⁽¹⁾	Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)