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IGNITION SIGNAL
EC-387
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Removal and InstallationEBS00MB3
IGNITION COIL WITH POWER TRANSISTOR
Refer to EM-29, "IGNITION COIL" .
Page 738 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-388
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INJECTOR CIRCUIT
INJECTOR CIRCUIT
PFP:16600
Component DescriptionEBS00MB4
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground NISSAN X-TRAIL 2001 Service Repair Manual EC-388
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INJECTOR CIRCUIT
INJECTOR CIRCUIT
PFP:16600
Component DescriptionEBS00MB4
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground](/manual-img/5/57405/w960_57405-737.png)
EC-388
[QR25(WITH EURO-OBD)]
INJECTOR CIRCUIT
INJECTOR CIRCUIT
PFP:16600
Component DescriptionEBS00MB4
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the needle valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.
CONSULT-II Reference Value in Data Monitor ModeEBS00MB5
Specification data are reference values.
ECM Terminals and Reference ValueEBS00MB6
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.)
SEF375Z
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 2.5 - 3.5 msec
2,000 rpm 2.5 - 3.5 msec
INJ PULSE-B1
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
101
102
103
104R/B
Y/B
G/B
L/BInjector No. 1
Injector No. 2
Injector No. 3
Injector No. 4[Engine is running]
●Warm-up condition
●Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0529E
PBIB0530E
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INJECTOR CIRCUIT
EC-389
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Wiring DiagramEBS00MB7
TBWA0082E
Page 740 of 3833
EC-390
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INJECTOR CIRCUIT
Diagnostic Procedure
EBS00MB8
1. INSPECTION START
Turn ignition switch to “START”.
Is any cylinder ignited?
Ye s o r N o
Yes >> GO TO 2.
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.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
Clicking noise should be heard.
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
PBIB0133E
MEC703B
Page 741 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual INJECTOR CIRCUIT
EC-391
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3.CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connector.
3. Turn ignit NISSAN X-TRAIL 2001 Service Repair Manual INJECTOR CIRCUIT
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3.CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connector.
3. Turn ignit](/manual-img/5/57405/w960_57405-740.png)
INJECTOR CIRCUIT
EC-391
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3.CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M61, F41
●Harness connectors F1, F101
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between injector and fuse
>> Repair harness or connectors.
5.CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 101, 102, 103, 104.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
PBIB0510E
Voltage: Battery voltage
PBIB0582E
Continuity should exist.
Page 742 of 3833
EC-392
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INJECTOR CIRCUIT
6. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F1, F101
●Harness for open or short between injector and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK INJECTOR
Refer to EC-392, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace injector.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00MB9
INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationEBS00MBA
INJECTOR
Refer to EM-32, "FUEL INJECTOR AND FUEL TUBE" . Resistance: 13.5 - 17.5Ω [at 20°C (68°F)]
PBIB0181E
Page 743 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual VIAS
EC-393
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VIASPFP:14956
DescriptionEBS00NBJ
SYSTEM DESCRIPTION
When the engine is running at low or medium speed, the power valve is fully closed. Und NISSAN X-TRAIL 2001 Service Repair Manual VIAS
EC-393
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VIASPFP:14956
DescriptionEBS00NBJ
SYSTEM DESCRIPTION
When the engine is running at low or medium speed, the power valve is fully closed. Und](/manual-img/5/57405/w960_57405-742.png)
VIAS
EC-393
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VIASPFP:14956
DescriptionEBS00NBJ
SYSTEM DESCRIPTION
When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the
effective suction port length is equivalent to the total length of the intake manifold collector's suction port
including the intake valve. This long suction port provides increased air intake which results in improved suc-
tion efficiency and higher torque generation.
The surge tank and one-way valve are provided. When engine is running at high speed, the ECM sends the
signal to the VIAS control solenoid valve. This signal introduces the intake manifold vacuum into the power
valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided indepen-
dently for each cylinder. This shortened port length results in enhanced engine output with reduced suction
resistance under high speeds.
COMPONENT DESCRIPTION
Power Valve
The power valve is installed in intake manifold collector and used to
control the suction passage of the variable induction air control sys-
tem. It is set in the fully closed or fully opened position by the power
valve actuator operated by the vacuum stored in the surge tank. The
vacuum in the surge tank is controlled by the VIAS control solenoid
valve.
Sensor Input Signal to ECM ECM function Actuator
Mass air flow sensor Amount of intake air
VIAS control VIAS control solenoid valve Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Ignition switch Start signal
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
Engine coolant temperature sensor Engine coolant temperature
PBIB0843E
PBIB0946E
Page 744 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-394
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VIAS
VIAS Control Solenoid Valve
The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF si NISSAN X-TRAIL 2001 Service Repair Manual EC-394
[QR25(WITH EURO-OBD)]
VIAS
VIAS Control Solenoid Valve
The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF si](/manual-img/5/57405/w960_57405-743.png)
EC-394
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VIAS
VIAS Control Solenoid Valve
The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is off, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.
CONSULT-II Reference Value in Data Monitor ModeEBS00NBK
ECM Terminals and Reference ValueEBS00NBL
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.
PBIB0947E
MONITOR ITEM CONDITION SPECIFICATION
VIAS S/V
●Engine: After warming upIdle OFF
More than 5,000 rpm ON
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
25 GY/LVIAS control solenoid
valve[Engine is running]
●Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Engine speed is above 5,000 rpm0 - 1.0V