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FUEL INJECTOR EC-1313
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Revision: 2006 December 2006 FX35/FX45
Component InspectionNBS004H2
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationNBS004H3
FUEL INJECTOR
Refer to EM-194, "FUEL INJECTOR AND FUEL TUBE" .
Resistance: 13.5 - 17.5
Ω [at 10 - 60 °C (50 - 140 °F)]
PBIB1727E
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![INFINITI FX35 2006 Service Manual EC-1314
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FUEL PUMP
Revision: 2006 December 2006 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS004H4
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and INFINITI FX35 2006 Service Manual EC-1314
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FUEL PUMP
Revision: 2006 December 2006 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS004H4
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and](/manual-img/42/57019/w960_57019-2697.png)
EC-1314
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FUEL PUMP
Revision: 2006 December 2006 FX35/FX45
FUEL PUMPPFP:17042
DescriptionNBS004H4
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 ModeNBS004H5
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.
PBIB1508E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
For 1 seconds after turning ignition switch: ON
Engine running or cranking ON
Except above OFF
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FUEL PUMP EC-1315
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Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS004H6
TBWM1363E
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![INFINITI FX35 2006 Service Manual EC-1316
[VK45DE]
FUEL PUMP
Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals INFINITI FX35 2006 Service Manual EC-1316
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FUEL PUMP
Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals](/manual-img/42/57019/w960_57019-2699.png)
EC-1316
[VK45DE]
FUEL PUMP
Revision: 2006 December 2006 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 ProcedureNBS004H7
1. CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers. Fuel pressure pulsation should be felt on the fuel feed hose
for 1 second after ignition switch is turned ON.
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)
PBIB3245E
Voltage: Battery voltage
PBIB1187E
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![INFINITI FX35 2006 Service Manual FUEL PUMP EC-1317
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Revision: 2006 December 2006 FX35/FX45
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/ INFINITI FX35 2006 Service Manual FUEL PUMP EC-1317
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3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/](/manual-img/42/57019/w960_57019-2700.png)
FUEL PUMP EC-1317
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Revision: 2006 December 2006 FX35/FX45
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R terminal 40 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 11.
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. Voltage: Battery voltage
PBIB1926E
PBIB1507E
Voltage: Battery voltage should exist for 1 sec-
ond after ignition switch is turned ON.
PBIB0795E
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![INFINITI FX35 2006 Service Manual EC-1318
[VK45DE]
FUEL PUMP
Revision: 2006 December 2006 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 fu INFINITI FX35 2006 Service Manual EC-1318
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FUEL PUMP
Revision: 2006 December 2006 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 fu](/manual-img/42/57019/w960_57019-2701.png)
EC-1318
[VK45DE]
FUEL PUMP
Revision: 2006 December 2006 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 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-1319, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace fuel pump.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-811, "
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.
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FUEL PUMP EC-1319
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Revision: 2006 December 2006 FX35/FX45
Component InspectionNBS004H8
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between “fuel level sensor unit and fuel pump” terminals 1 and 3.
Removal and InstallationNBS004H9
FUEL PUMP
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Resistance: 0.2 - 5.0
Ω [at 25 °C (77 °F)]
SEC918C
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EC-1320
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ICC BRAKE SWITCH
Revision: 2006 December 2006 FX35/FX45
ICC BRAKE SWITCHPFP:25320
Component DescriptionNBS004HH
When depress on the brake pedal, ICC brake switch is turned OFF
and stop lamp switch is turned ON. ECM detects the state of the
brake pedal by this input of two kinds (ON/OFF signal)
Refer to ACS-6, "
DESCRIPTION" for the ICC function.
CONSULT-II Reference Value in Data Monitor ModeNBS004HI
Specification data are reference values.
PBIB2558E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ICC brake switch)
Ignition switch: ON Brake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW2
(Stop lamp switch)
Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON