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FUEL INJECTOREC-553
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Wiring DiagramINFOID:0000000001326440
Specification data are reference values
and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION:
TBWM1408E
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![INFINITI FX35 2008 Service Manual
EC-554
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR
Do not use ECM ground terminals when measuring in
put/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground ot her INFINITI FX35 2008 Service Manual
EC-554
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR
Do not use ECM ground terminals when measuring in
put/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground ot her](/manual-img/42/57017/w960_57017-1793.png)
EC-554
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR
Do not use ECM ground terminals when measuring in
put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000001326441
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Ye s o r N o
Yes (With CONSULT-III)>>GO TO 2.
Yes (without CONSULT-III)>>GO TO 3.
No >> GO TO 6.
2.CHECK OVERALL FUNCTION
With CONSULT-III
1. Start engine.
2. Perform “POWER BALANCE” in “A CTIVE TEST” mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
3.CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-III
1. Turn ignition switch OFF.
TER-
MI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
21
22
23
40
41
42 W
G
R
LG
B
P Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
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)
[Engine is running]
Warm-up condition
Engine speed: 2,000 rpm BATTERY VOLTAGE
(11 - 14V)
SEC984C
SEC985C
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![INFINITI FX35 2008 Service Manual
FUEL INJECTOREC-555
< SERVICE INFORMATION > [VQ35DE]
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2. Disconnect harness connector F50, F251
3. Turn ignition switch ON.
4. Check voltage between harness connector F INFINITI FX35 2008 Service Manual
FUEL INJECTOREC-555
< SERVICE INFORMATION > [VQ35DE]
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2. Disconnect harness connector F50, F251
3. Turn ignition switch ON.
4. Check voltage between harness connector F](/manual-img/42/57017/w960_57017-1794.png)
FUEL INJECTOREC-555
< SERVICE INFORMATION > [VQ35DE]
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2. Disconnect harness connector F50, F251
3. Turn ignition switch ON.
4. Check voltage between harness connector F50 terminal 5 and
ground.
5. Turn ignition switch OFF.
6. Disconnect ECM harness connector.
7. Check harness continuity between harness connector F50 and ECM as follows.
Refer to Wiring Diagram.
8. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M82, F102
Fuse block (J/B) connector M1
15A fuse
Harness for open or short between harness connector F50 and fuse
Harness for open or short between harness connector F50 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK FUNCTION OF FUEL INJECTOR-II
PBIB2624E
Voltage: Battery voltage
Cylinder Harness connector F50
terminal ECM terminal
1623
2442
3222
4341
5121
6740
Continuity should exist.
PBIB2323E
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![INFINITI FX35 2008 Service Manual
EC-556
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR
Provide battery voltage between harness connector F251 as follows
and then interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK INFINITI FX35 2008 Service Manual
EC-556
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR
Provide battery voltage between harness connector F251 as follows
and then interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK](/manual-img/42/57017/w960_57017-1795.png)
EC-556
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR
Provide battery voltage between harness connector F251 as follows
and then interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK >>
INSPECTION END
NG >> GO TO 6.
6.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M82, F102
Fuse block (J/B) connector M1
10A fuse
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.
Cylinder Harness connector F251 terminal
(+) (–)
1
56
24
32
43
51
67
Operating sound should exist.
PBIB2497E
PBIB1561E
Voltage: Battery voltage
PBIB0582E
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![INFINITI FX35 2008 Service Manual
FUEL INJECTOREC-557
< SERVICE INFORMATION > [VQ35DE]
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3. Check harness continuity between fuel injector
terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.
Refer to INFINITI FX35 2008 Service Manual
FUEL INJECTOREC-557
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3. Check harness continuity between fuel injector
terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.
Refer to](/manual-img/42/57017/w960_57017-1796.png)
FUEL INJECTOREC-557
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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 F251, F50
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-557, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace malfunctioning fuel injector.
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-139
.
>> INSPECTION END
Component InspectionINFOID:0000000001326442
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationINFOID:0000000001326443
FUEL INJECTOR
Refer to EM-45.
Continuity should exist.
Resistance: 11.1 - 14.5
Ω [at 10 - 60 °C (50 - 140 °F)]
PBIB1727E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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Page 1798 of 3924
![INFINITI FX35 2008 Service Manual
EC-558
< SERVICE INFORMATION >[VQ35DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001326444
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery v INFINITI FX35 2008 Service Manual
EC-558
< SERVICE INFORMATION >[VQ35DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001326444
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery v](/manual-img/42/57017/w960_57017-1797.png)
EC-558
< SERVICE INFORMATION >[VQ35DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001326444
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
start ability. 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 EC M stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly driv e 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 ModeINFOID:0000000001326445
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.
PBIB1569E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY For 1 second after turning ignition switch ON
Engine running or cranking
ON
Except above conditions OFF
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FUEL PUMPEC-559
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Wiring DiagramINFOID:0000000001326446
Specification data are reference values
and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
TBWM1409E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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![INFINITI FX35 2008 Service Manual
EC-560
< SERVICE INFORMATION >[VQ35DE]
FUEL PUMP
Diagnosis Procedure
INFOID:0000000001326447
1.CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
OK or NG
OK INFINITI FX35 2008 Service Manual
EC-560
< SERVICE INFORMATION >[VQ35DE]
FUEL PUMP
Diagnosis Procedure
INFOID:0000000001326447
1.CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
OK or NG
OK](/manual-img/42/57017/w960_57017-1799.png)
EC-560
< SERVICE INFORMATION >[VQ35DE]
FUEL PUMP
Diagnosis Procedure
INFOID:0000000001326447
1.CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 113 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Check harness continuity between IPDM E/R terminal 40 and ECM terminal 113. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
TER- MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
113 GY/R Fuel pump relay [Ignition switch: ON]
For 1 second after turning ignition switch ON
[Engine is running]
0 - 1.5V
[Ignition switch: ON]
More than 1 second after turning ignition switch ON BATTERY VOLTAGE
(11 - 14V)
Fuel pressure pulsation should
be felt on the fuel feed
hose for 1 second after igniti on switch is turned ON.
PBIB1612E
Voltage: Battery voltage
PBIB1187E
Continuity should exist.
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