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 

EC-448, "Diagnosis Procedure"

.)

• 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]

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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

>>

EC-453, "Diagnosis Procedure"

.

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

>>

EC-453, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009178383

1.

INSPECTION START

Confirm the malfunctioning system (power valve 1 or power valve 2). Refer to 

EC-452, "Component Function

Check"

.

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]

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 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-

ponent Parts Location"

.

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

disconnection. Refer to 

EC-45, "VARIABLE INDUCTION AIR

SYSTEM : System Description"

.

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-

nent Parts Location"

.

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