DTC P0171: Fuel Injection System Function: Wiring Diagram

Fig 1: Identifying Wiring Diagram With Connector End View (EC-FUEL-01)

Courtesy of NISSAN NORTH AMERICA, INC.

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

Pulse signal is measured by CONSULT.

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 No.

Wire color

Item

Condition

Data (DC voltage)

BR/W

A/F sensor 1 heater

[Engine is running]

Warm-up condition
Idle speed

(More than 140 seconds after starting engine)

Approximately 2.9 - 8.8 V⁽¹⁾

Courtesy of NISSAN NORTH AMERICA, INC.

25
29
30
31

R
O
GR
L

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

[Engine is running]

Warm-up condition
Idle speed

NOTE: The pulse cycle changes depending on rpm at idle

Battery voltage (11 - 14 V)⁽¹⁾

Courtesy of NISSAN NORTH AMERICA, INC.

[Engine is running]

Warm-up condition
Engine speed: 2, 000 rpm

Battery voltage (11 - 14 V)⁽¹⁾

Courtesy of NISSAN NORTH AMERICA, INC.

L/R

A/F sensor 1

[Engine is running]

Warm-up condition
Engine speed: 2, 000 rpm

Approximately 1.8 V
Output voltage varies with air fuel ratio.

L/G

A/F sensor 1

[Ignition switch: ON]

Approximately 2.2 V

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