Infiniti FX35 / FX45. Manual — part 598
FUEL INJECTOR
EC-1153
< SERVICE INFORMATION >
[VK45DE]
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Provide battery voltage between the following terminals, and then
interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
6.
CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1.
Disconnect fuel injector harness connectors.
2.
Check harness continuity between the following terminals. Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
Cylinder
Harness connector
terminal
(+)
(–)
1
F201
5
3
3
2
5
1
7
6
2
F221
5
3
4
2
6
1
8
6
Operating sound should exist.
PBIB2449E
: Vehicle front
1.
Fuel injector (Bank 2)
2.
Fuel injector (Bank 1)
Harness connector terminal
Fuel injector terminal
F201 terminal 1
2
F201 terminal 2
F201 terminal 3
F201 terminal 6
F201 terminal 5
1
F221 terminal 1
2
F221 terminal 2
F221 terminal 3
F221 terminal 6
F221 terminal 5
1
Continuity should exist.
PBIB3235E
EC-1154
< SERVICE INFORMATION >
[VK45DE]
FUEL INJECTOR
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK FUEL INJECTOR
EC-1154, "Component Inspection"
.
OK or NG
OK
>> GO TO 8.
NG
>> Replace fuel injector.
8.
CHECK INTERMITTENT INCIDENT
>> INSPECTION END
Component Inspection
INFOID:0000000001327055
FUEL INJECTOR
1.
Disconnect fuel injector harness connector.
2.
Check resistance between terminals as shown in the figure.
Removal and Installation
INFOID:0000000001327056
FUEL INJECTOR
.
Resistance: 13.5 - 17.5
Ω
[at 10 - 60
°
C (50 - 140
°
F)]
PBIB1727E
FUEL PUMP
EC-1155
< SERVICE INFORMATION >
[VK45DE]
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FUEL PUMP
Description
INFOID:0000000001327057
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-III Reference Value in Data Monitor Mode
INFOID:0000000001327058
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 is turned to ON.
Operates for 1 second.
Engine running and cranking
Operates.
When engine is stopped
Stops in 1.5 seconds.
Except as shown above
Stops.
PBIB1508E
MONITOR ITEM
CONDITION
SPECIFICATION
FUEL PUMP RLY
• For 1 seconds after turning ignition switch: ON
• Engine running or cranking
ON
• Except above
OFF
EC-1156
< SERVICE INFORMATION >
[VK45DE]
FUEL PUMP
Wiring Diagram
INFOID:0000000001327059
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 dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TBWM1363E
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