DTC P0171 Fuel Injection System Function: Wiring Diagram

Fig 1: Identifying Wiring Diagram (EC-FUEL-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-II.

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.

WIRE COLOR AND TERMINAL NO. DESCRIPTION

TERMINAL NO.

WIRE COLOR

ITEM

CONDITION

DATA (DC Voltage)

A/F sensor 1 heater

[Engine is running]

Warm-up condition
Idle speed

Approximately 5V⁽¹⁾

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

OR/L

A/F sensor 1

[Engine is running]

Warm-up condition
Idle speed

Approximately 3.1V

B/Y

Approximately 2.6V

2 - 3V

W/L

2 - 3V

22
23
41
42

G/B
R/B
L/B
Y/B

Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 4
Fuel injector No. 2

[Engine is running]

Warm-up condition
Idle speed

BATTERY VOLTAGE (11 - 14V)⁽¹⁾

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

[Engine is running]

Warm-up condition
Engine speed: 2, 000 rpm

BATTERY VOLTAGE (11 - 14V)⁽¹⁾

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

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