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VIAS
EC-901
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Diagnostic ProcedureEBS011I4
1. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CON-
SULT-II.
3. Turn VIAS control solenoid valve ON and OFF, and make sure
that power valve actuator rod moves.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Rev engine quickly up to above 5,000 rpm and make sure that
power valve actuator rod moves.
OK or NG
OK >>INSPECTION END
NG (With CONSULT-II) >>GO TO 2.
NG (Without CONSULT-II) >>GO TO 3.
PBIB0844E
PBIB0949E
PBIB0949E
Page 1306 of 4555
![NISSAN X-TRAIL 2005 Service Repair Manual EC-902
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VIAS
2. CHECK VACUUM EXISTENCE
With CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perfor NISSAN X-TRAIL 2005 Service Repair Manual EC-902
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VIAS
2. CHECK VACUUM EXISTENCE
With CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perfor](/manual-img/5/57403/w960_57403-1305.png)
EC-902
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VIAS
2. CHECK VACUUM EXISTENCE
With CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CON-
SULT-II.
4. Turn VIAS control solenoid valve ON and OFF, and check vac-
uum existence under the following conditions.
OK or NG
OK >> Repair or replace power valve actuator.
NG >> GO TO 4.
3. CHECK VACUUM EXISTENCE
Without CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Disconnect VIAS control solenoid valve harness connector.
3. Start engine and let it idle.
4. Apply 12V of direct current between VIAS control solenoid valve
terminals 1 and 2.
5. Check vacuum existence under the following conditions.
OK or NG
OK >> Repair or replace power valve actuator.
NG >> GO TO 4.
4. CHECK VACUUM HOSE
1. Stop engine.
2. Check hoses and tubes between intake manifold and power
valve actuator for crack, clogging, improper connection or dis-
connection. Refer to EC-545, "
Vacuum Hose Drawing" .
OK or NG
OK >> GO TO 5.
NG >> Repair hoses or tubes.
VIAS SOL VALVE Vacuum
ON Should exist
OFF Should not exist
PBIB0844E
Condition Vacuum
12V direct current supply Should exist
No supply Should not exist
PBIB0845E
SEF109L
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![NISSAN X-TRAIL 2005 Service Repair Manual VIAS
EC-903
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5. CHECK VACUUM TANK
Refer to EC-904, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6. CHECK VIAS CONTROL NISSAN X-TRAIL 2005 Service Repair Manual VIAS
EC-903
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5. CHECK VACUUM TANK
Refer to EC-904, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6. CHECK VIAS CONTROL](/manual-img/5/57403/w960_57403-1306.png)
VIAS
EC-903
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5. CHECK VACUUM TANK
Refer to EC-904, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6. CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Disconnect VIAS control solenoid valve harness connector.
2. Turn ignition switch ON.
3. Check voltage between VIAS control solenoid valve terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7. DETECT MALFUNCTIONING PART
Check harness for open or short between VIAS control solenoid valve and ECM relay.
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between VIAS control solenoid valve terminal 2 and ECM terminal 6.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0947E
Voltage: Battery voltage
PBIB0173E
Continuity should exist.
Page 1308 of 4555
![NISSAN X-TRAIL 2005 Service Repair Manual EC-904
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VIAS
9. CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-904, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace VIAS control solenoid valve.
10. CHECK INTE NISSAN X-TRAIL 2005 Service Repair Manual EC-904
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VIAS
9. CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-904, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace VIAS control solenoid valve.
10. CHECK INTE](/manual-img/5/57403/w960_57403-1307.png)
EC-904
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VIAS
9. CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-904, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace VIAS control solenoid valve.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-624, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS011I5
VIAS CONTROL SOLENOID VALVE
With CONSULT-II
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode.
4. Check air passage continuity and operation delay time under the
following conditions.
Operation takes less than 1 second.
Without CONSULT-II
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Operation takes less than 1 second.
VACUUM TANK
1. Disconnect vacuum hose connected to vacuum tank.
2. Connect a vacuum pump to the port A of vacuum pump.
3. Apply vacuum and make sure that vacuum exists at the port B .
Condition
VIAS SOL VALVEAir passage continuity
between A and BAir passage continuity
between A and C
ON Yes No
OFF No Yes
PBIB0177E
ConditionAir passage continuity
between A and BAir passage continuity
between A and C
12V direct current supply
between terminals 1 and 2Ye s N o
No supply No Yes
MEC488B
PBIB0846E
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VIAS
EC-905
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Removal and InstallationEBS011I6
VIAS CONTROL SOLENOID VALVE
Refer to EM-18, "INTAKE MANIFOLD" .
Page 1310 of 4555
![NISSAN X-TRAIL 2005 Service Repair Manual EC-906
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FUEL PUMP CIRCUIT
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS0114O
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and batter NISSAN X-TRAIL 2005 Service Repair Manual EC-906
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FUEL PUMP CIRCUIT
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS0114O
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and batter](/manual-img/5/57403/w960_57403-1309.png)
EC-906
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FUEL PUMP CIRCUIT
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS0114O
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 crankshaft position sensor (POS) and cam-
shaft 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 ModeEBS0114P
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 crankingOperates
When engine is stoppedStops in 1.5 seconds
Except as shown aboveStops
PBIB0513E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
For 1 second after turning ignition switch ON
Engine running or crankingON
Except above conditions OFF
Page 1311 of 4555
FUEL PUMP CIRCUIT
EC-907
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Wiring DiagramEBS0114Q
LHD MODELS
TBWA0632E
Page 1312 of 4555
EC-908
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FUEL PUMP CIRCUIT
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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
114 B/OR Fuel pump relay[Ignition switch: ON]
For 1 second after turning ignition switch ON
[Engine is running]0 - 1.0V
[Ignition switch: ON]
More than 1 second after turning ignition
switch ONBATTERY VOLTAGE
(11 - 14V)