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EC-1352
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INJECTOR CIRCUIT
Revision: 2005 July 2005 FX
Wiring DiagramABS007WX
TBWM0264E
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![INFINITI FX35 2005 Service Manual INJECTOR CIRCUIT EC-1353
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Specification data are reference values and are measured between each terminal and ground.
Pulse INFINITI FX35 2005 Service Manual INJECTOR CIRCUIT EC-1353
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Specification data are reference values and are measured between each terminal and ground.
Pulse](/manual-img/42/57020/w960_57020-2745.png)
INJECTOR CIRCUIT EC-1353
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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureABS00E5T
1. INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Ye s o r N o
Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No >> GO TO 3.
2. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
3. Make sure that each circuit produces a momentary engine speed drop.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
TER-
MINAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
21
22
23
40
41
42
44
63 W
R
P
PU
BR
B
OR
G Injector No. 5
Injector No. 3
Injector No. 1
Injector No. 6
Injector No. 4
Injector No. 2
Injector No. 7
Injector No. 8 [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)
PBIB0042E
PBIB0043E
PBIB0133E
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EC-1354
[VK45DE]
INJECTOR CIRCUIT
Revision: 2005 July 2005 FX
3. CHECK FUNCTION OF INJECTOR-I
1. Turn ignition switch OFF.
2. Disconnect harness connector F21, F201 (bank 1) and F41, F221 (bank 2).
3. Turn ignition switch ON.
4. Check voltage between the following; harness connector F21 terminal 5 and ground,
harness connector F41 terminal 5 and ground
with CONSULT-II or tester.
5. Turn ignition switch OFF.
6. Disconnect ECM harness connector.
7. Check harness continuity between the following terminals.
8. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4. Voltage: Battery voltage
Cylinder Harness connector terminal ECM terminal
1 F21 terminal 3 23
3 F21 terminal 2 22
5 F21 terminal 1 21
7 F21 terminal 6 44
2 F41 terminal 3 42
4 F41 terminal 2 41
6 F41 terminal 1 40
8 F41 terminal 6 63
Continuity should exist.
PBIB2561E
PBIB0180E
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INJECTOR CIRCUIT EC-1355
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4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M82, F102
Harness connectors F21, F201
Harness connectors F41, F221
Fuse block (J/B) connector M1
15A fuse
Harness for open or short between harness connector F21 and fuse
Harness for open or short between harness connector F41 and fuse
Harness for open or short between harness connector F21 and ECM
Harness for open or short between harness connector F41 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK FUNCTION OF INJECTOR-II
Provide battery voltage between the following terminals, and then
interrupt it. Listen to each injector operating sound.
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
Cylinder Harness connector terminal
(+) (–)
1
F201 5 3
32
51
76
2
F221 5 3
42
61
86
Operating sound should exist.
PBIB2449E
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EC-1356
[VK45DE]
INJECTOR CIRCUIT
Revision: 2005 July 2005 FX
6. CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1. Disconnect 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.
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 INJECTOR
Refer to EC-1357, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace injector.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-854, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Harness connector terminal 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.
PBIB1518E
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INJECTOR CIRCUIT EC-1357
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Revision: 2005 July 2005 FX
Component InspectionABS00E5U
INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationABS007X0
INJECTOR
Refer to EM-192, "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 2005 Service Manual EC-1358
[VK45DE]
FUEL PUMP CIRCUIT
Revision: 2005 July 2005 FX
FUEL PUMP CIRCUITPFP:17042
DescriptionABS007X1
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine spee INFINITI FX35 2005 Service Manual EC-1358
[VK45DE]
FUEL PUMP CIRCUIT
Revision: 2005 July 2005 FX
FUEL PUMP CIRCUITPFP:17042
DescriptionABS007X1
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine spee](/manual-img/42/57020/w960_57020-2750.png)
EC-1358
[VK45DE]
FUEL PUMP CIRCUIT
Revision: 2005 July 2005 FX
FUEL PUMP CIRCUITPFP:17042
DescriptionABS007X1
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 ModeABS007X2
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 CIRCUIT EC-1359
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Revision: 2005 July 2005 FX
Wiring DiagramABS007X3
TBWM0729E