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FUEL INJECTOR EC-633
[VQ35DE]
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5. CHECK FUNCTION OF FUEL INJECTOR-II
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-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
Cylinder Harness connector F251 terminal
(+) (–)
1
5 6
24
32
43
51
67
Operating sound should exist.
PBIB2497E
PBIB1561E
Voltage: Battery voltage
PBIB0582E
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![INFINITI FX35 2007 Service Manual EC-634
[VQ35DE]
FUEL INJECTOR
Revision: 2006 July 2007 FX35/FX45
7. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M82, F102
Fuse block (J/B) connector M1
10A fuse
Harness for INFINITI FX35 2007 Service Manual EC-634
[VQ35DE]
FUEL INJECTOR
Revision: 2006 July 2007 FX35/FX45
7. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M82, F102
Fuse block (J/B) connector M1
10A fuse
Harness for](/manual-img/42/57018/w960_57018-2009.png)
EC-634
[VQ35DE]
FUEL INJECTOR
Revision: 2006 July 2007 FX35/FX45
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.
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-635, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace malfunctioning fuel injector.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-147, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.
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FUEL INJECTOR EC-635
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Component InspectionNBS003ZI
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationNBS003ZJ
FUEL INJECTOR
Refer to EM-45, "FUEL INJECTOR AND FUEL TUBE" .
Resistance: 11.1 - 14.5
Ω [at 10 - 60 °C (50 - 140 °F)]
PBIB1727E
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![INFINITI FX35 2007 Service Manual EC-636
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS003ZK
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and batt INFINITI FX35 2007 Service Manual EC-636
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS003ZK
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and batt](/manual-img/42/57018/w960_57018-2011.png)
EC-636
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS003ZK
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 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 ModeNBS003ZL
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 Sto ps.
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 PUMP EC-637
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Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS003ZM
TBWM1409E
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![INFINITI FX35 2007 Service Manual EC-638
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when INFINITI FX35 2007 Service Manual EC-638
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when](/manual-img/42/57018/w960_57018-2013.png)
EC-638
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
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.
Diagnostic ProcedureNBS003ZN
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-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
11 3 G Y / R F u e l p u m p r e l a y [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 ignition switch is turned ON.
PBIB1612E
Voltage: Battery voltage
PBIB1187E
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![INFINITI FX35 2007 Service Manual FUEL PUMP EC-639
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3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R ha INFINITI FX35 2007 Service Manual FUEL PUMP EC-639
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3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R ha](/manual-img/42/57018/w960_57018-2014.png)
FUEL PUMP EC-639
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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
Harness for open or short between IPDM E/R and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect “fuel level sensor unit and fuel pump” harness con- nector.
4. Turn ignition switch ON.
5. Check voltage between “fuel level sensor unit and fuel pump” terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6. Continuity should exist.
PBIB1572E
Voltage: Battery voltage should exist for 1 second
after ignition switch is turned ON.
PBIB0795E
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![INFINITI FX35 2007 Service Manual EC-640
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
6. CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7 INFINITI FX35 2007 Service Manual EC-640
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
6. CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7](/manual-img/42/57018/w960_57018-2015.png)
EC-640
[VQ35DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
6. CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and “fuel level sensor unit and fuel pump” termi- nal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, B6
Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 and ground. Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to power in harness or connectors.
10. CHECK FUEL PUMP
Refer to EC-1323, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace “fuel level sensor unit and fuel pump”.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-812, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)"
NG >> Repair or replace harness or connectors. Continuity should exist.
Continuity should exist.