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.

INPUT/OUTPUT VOLTAGE CHART

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
2	R	A/F sensor 1 heater	[Engine is running] Warm-up condition Idle speed	Approximately 5V* Courtesy of NISSAN MOTOR CO., U.S.A.
16	OR/L	A/F sensor 1	[Engine is running] Warm-up condition Idle speed	Approximately 3.1V
35		B/Y		Approximately 2.6V
56		OR		2 - 3V
75		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 NOTE: The pulse cycle changes depending on rpm at idle.	BATTERY VOLTAGE (11 - 14V)* Courtesy of NISSAN MOTOR CO., U.S.A.
22 23 41 42	G/B R/B L/B Y/B		[Engine is running] Warm-up condition Engine speed: 2, 000 rpm	BATTERY VOLTAGE (11 - 14V)* Courtesy of NISSAN MOTOR CO., U.S.A.
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)