Infiniti G35 (V35). Manual - part 444

FUEL INJECTOR

EC-657

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EC

7. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M72, F102

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Harness connectors F33, F221

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Fuse block (J/B) connector M4

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10A fuse

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Harness for open or short between fuel injector and fuse

>> Repair open circuit or short to ground or short to power in harness or connectors.

8. 

CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42. 
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F221, F33

●

Harness for open or short between fuel injector and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

10. 

CHECK FUEL INJECTOR

Refer to 

EC-658, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Replace malfunctioning fuel injector.

11. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-658

FUEL INJECTOR

Component Inspection

NBS0011R

FUEL INJECTOR

1.

Disconnect fuel injector harness connector.

2.

Check resistance between terminals as shown in the figure.

Removal and Installation

NBS0011S

FUEL INJECTOR

Refer to 

EM-38, "FUEL INJECTOR AND FUEL TUBE"

 .

Resistance: 11.1 - 14.5

Ω

 [at 10 - 60

°

C (50 - 140

°

F)]

PBIB1727E

FUEL PUMP

EC-659

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EC

FUEL PUMP

PFP:17042

Description

NBS0011T

SYSTEM DESCRIPTION

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.

COMPONENT DESCRIPTION

A turbine type design fuel pump is used in the fuel tank.

CONSULT-II Reference Value in Data Monitor Mode

NBS0011U

Specification data are reference values.

Sensor

Input Signal to ECM

ECM Function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

Fuel pump control

Fuel pump relay

Battery

Battery voltage*

Condition

Fuel pump operation

Ignition switch: ON.

Operates for 1 second.

Engine running or cranking

Operates.

Engine: Stopped

Stops in 1.5 seconds.

Except as shown above

Stops.

PBIB1100E

MONITOR ITEM

CONDITION

SPECIFICATION

FUEL PUMP RLY

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For 1 second after turning ignition switch ON

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Engine running or cranking

ON

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Except above conditions

OFF

EC-660

FUEL PUMP

Wiring Diagram

NBS0011V

TBWM0830E