Page 745 of 3833
VIAS
EC-395
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Wiring DiagramEBS00NBM
TBWA0159E
Page 746 of 3833
EC-396
[QR25(WITH EURO-OBD)]
VIAS
Diagnostic Procedure
EBS00NBN
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 747 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual VIAS
EC-397
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2.CHECK VACUUM EXISTENCE
With CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and le NISSAN X-TRAIL 2001 Service Repair Manual VIAS
EC-397
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EC
2.CHECK VACUUM EXISTENCE
With CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and le](/manual-img/5/57405/w960_57405-746.png)
VIAS
EC-397
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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
vacuum 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-32, "
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
Page 748 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-398
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VIAS
5. CHECK VACUUM TANK
Refer to EC-399, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6. CHECK VIAS CONTROL SOLENOID VALVE POWER NISSAN X-TRAIL 2001 Service Repair Manual EC-398
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VIAS
5. CHECK VACUUM TANK
Refer to EC-399, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6. CHECK VIAS CONTROL SOLENOID VALVE POWER](/manual-img/5/57405/w960_57405-747.png)
EC-398
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VIAS
5. CHECK VACUUM TANK
Refer to EC-399, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6. CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “ON”.
2. Disconnect VIAS control solenoid valve harness connector.
3. Turn ignition switch “ON”.
4. 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 the following.
●Harness connectors E60, F36
●Fuse block (J/B) connector E103
●10A fuse
●Harness continuity between fuse and VIAS control solenoid valve
>> Repair 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 ECM terminal 25 and VIAS control solenoid valve terminal 2. 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 749 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual VIAS
EC-399
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9.CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-399, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace VIAS control s NISSAN X-TRAIL 2001 Service Repair Manual VIAS
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9.CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-399, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace VIAS control s](/manual-img/5/57405/w960_57405-748.png)
VIAS
EC-399
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9.CHECK VIAS CONTROL SOLENOID VALVE
Refer to EC-399, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace VIAS control solenoid valve.
10.CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00NBO
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
Page 750 of 3833
EC-400
[QR25(WITH EURO-OBD)]
VIAS
Removal and Installation
EBS00NBP
VIAS CONTROL SOLENOID VALVE
Refer to EM-16, "INTAKE MANIFOLD" .
Page 751 of 3833
START SIGNAL
EC-401
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START SIGNALPFP:48750
CONSULT-II Reference Value in Data Monitor ModeEBS00MBB
Specification data are reference values.
ECM Terminals and Reference ValueEBS00MBC
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.
MONITOR ITEM CONDITION SPECIFICATION
START SIGNAL
●Ignition switch: ON → START → ON OFF → ON → OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
41 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]9 - 14V
Page 752 of 3833
EC-402
[QR25(WITH EURO-OBD)]
START SIGNAL
Wiring Diagram
EBS00MBD
TBWA0085E