Fuel Pump Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram - EC-F/PUMP-01

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

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

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 SPECIFICATION

TERMINAL NO.	WIRE COLOR	ITEM	CONDITION	DATA (DC Voltage)
38	L	Fuel pump control module (FPCM) check	[Ignition switch: ON] More than a few seconds after turning ignition switch ON	Approximately 0V
38	L	Fuel pump control module (FPCM) check	[Ignition switch: ON] For a few seconds after turning ignition switch ON [Engine is running] Warm-up condition Idle speed	4 - 6V
39	L/Y	Fuel pump control module (FPCM)	[When cranking engine]	0 - 0.5V
39	L/Y	Fuel pump control module (FPCM)	[Engine is running] Warm-up condition Idle speed	8 - 12V
113	GR	Fuel pump relay	[Ignition switch: ON] For 1 second after turning ignition switch ON [Engine is running]	0 - 1.5V
113	GR	Fuel pump relay	[Ignition switch: ON] More than 1 second after turning ignition switch ON.	BATTERY VOLTAGE (11 - 14V)