Nissan Pathfinder. Manual — part 536
EC-450
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
SENSOR POWER SUPPLY2 CIRCUIT
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to
EC-284, "Component Inspection"
• Refrigerant pressure sensor (Refer to
.)
• APP sensor 2 (Refer to
EC-410, "Component Inspection"
• EVAP control system pressure sensor (Refer to
EC-315, "Component Inspection"
.)
• EOP sensor (Refer to
EC-345, "Component Inspection"
Is the inspection result normal?
YES
>> Perform
GI-49, "Intermittent Incident"
.
NO
>> Replace malfunctioning component.
VARIABLE INDUCTION AIR SYSTEM
EC-451
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
VARIABLE INDUCTION AIR SYSTEM
Component Function Check
INFOID:0000000009178382
1.
CHECK OVERALL FUNCTION-I
With CONSULT
1. Start engine and warm it up to the normal operating temperature.
2. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT.
3. Turn VIAS control solenoid valve 1 “ON” and “OFF”, and check that power valve actuator 1 rod moves.
Without CONSULT
1. Start engine and warm it up to the normal operating temperature.
2. Rev engine quickly up to approximately 5,000 rpm.
3. Check that power valve actuator 1 rod moves.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>>
.
2.
CHECK OVERALL FUNCTION-II
With CONSULT
1. Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT.
2. Turn VIAS control solenoid valve 2 “ON” and “OFF”, and check that power valve actuator 2 rod moves.
Power valve actuator 1
Power valve actuator 1 rod
Power valve actuator 2
Power valve actuator 2 rod
: Vehicle front
Power valve actuator 1
Power valve actuator 1 rod
Power valve actuator 2
Power valve actuator 2 rod
: Vehicle front
JMBIA1129ZZ
JMBIA1386ZZ
EC-452
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
Without CONSULT
1. When revving engine up to 5,000 rpm quickly.
2. Rev engine quickly up to approximately 5,000 rpm.
3. Check that power valve actuator 2 rod moves.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>>
.
Diagnosis Procedure
INFOID:0000000009178383
1.
INSPECTION START
Confirm the malfunctioning system (power valve 1 or power valve 2). Refer to
.
Which system is related to the incident?
Power valve 1>>GO TO 2.
Power valve 2>>GO TO 6.
2.
CHECK VACUUM EXISTENCE-I
With CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Start engine and let it idle.
3. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT.
4. Turn VIAS control solenoid valve 1 ON and OFF, and check vacuum existence under the following condi-
tions.
Power valve actuator 1
Power valve actuator 1 rod
Power valve actuator 2
Power valve actuator 2 rod
: Vehicle front
Power valve actuator 1
Power valve actuator 1 rod
Power valve actuator 2
Power valve actuator 2 rod
: Vehicle front
JMBIA1129ZZ
JMBIA1386ZZ
VARIABLE INDUCTION AIR SYSTEM
EC-453
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Without CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Start engine.
4. Rev engine quickly up to approximately 5,000 rpm.
5. Check vacuum existence under the following conditions.
Is the inspection result normal?
YES
>> Repair or replace power valve actuator 1. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Com-
.
NO
>> GO TO 3.
3.
CHECK VACUUM TANK
1. Stop engine and disconnect vacuum hose connected to intake manifold collector.
2. Start engine and let it idle.
3. Check vacuum existence from intake manifold collector.
Does vacuum existence from the intake manifold collector?
YES
>> GO TO 4.
NO
>> Replace intake manifold collector. Refer to
EM-26, "Removal and Installation"
.
4.
CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for crack, clogging, improper connection or
EC-45, "VARIABLE INDUCTION AIR
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair hoses or tubes.
5.
CHECK VIAS CONTROL SOLENOID VALVE 1
Check VIAS control solenoid valve 1. Refer to
EC-391, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace VIAS control solenoid valve 1. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Compo-
6.
CHECK VACUUM EXISTENCE-II
With CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Start engine and let it idle.
3. Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT.
4. Turn VIAS control solenoid valve 2 ON and OFF, and check vacuum existence under the following condi-
tions.
VIAS S/V-1
Vacuum
ON
Existed
OFF
Not existed
Condition
Vacuum
Idle
Existed
Rev engine quickly up to approximately 5,000 rpm
Not existed
SEF109L
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