Nissan Teana J32. Manual - part 454

EC-354

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

VARIABLE INDUCTION AIR SYSTEM

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.

When revving engine up to 5,000 rpm quickly.

5.

Check vacuum existence under the following conditions.

Is the inspection result normal?

YES

>> Repair or replace power valve actuator 1.

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.

4.

CHECK VACUUM HOSE

1.

Stop engine.

2.

Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to 

EC-93, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair hoses or tubes.

5.

CHECK VIAS CONTROL SOLENOID VALVE 1

Refer to 

EC-286, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace VIAS control solenoid valve 1.

6.

CHECK VACUUM EXISTENCE-II

 With CONSULT-III

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-III.

4.

Turn VIAS control solenoid valve 2 “ON” and “OFF”, and check vacuum existence under the following con-
ditions.

 Without CONSULT-III

1.

Stop engine and disconnect vacuum hose connected to power valve actuator 2.

2.

Disconnect VIAS control solenoid valve 1 harness connector.

3.

Start engine.

Condition

Operation

Idle

Existed

When revving engine up to 5,000 rpm quickly

Not existed

SEF109L

VIAS S/V 2

Vacuum

ON

Existed

OFF

Not existed

VARIABLE INDUCTION AIR SYSTEM

EC-355

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

4.

When revving engine up to 5,000 rpm quickly.

5.

Check vacuum existence under the following conditions.

Is the inspection result normal?

YES

>> Repair or replace power valve actuator 2.

NO

>> GO TO 7.

7.

CHECK VACUUM HOSE

1.

Stop engine.

2.

Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to 

EC-93, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair hoses or tubes.

8.

CHECK VIAS CONTROL SOLENOID VALVE 2

Refer to 

EC-289, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace VIAS control solenoid valve 2.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "Intermittent Incident"

.

>> INSPECTION END

Diagnosis Procedure (VQ25DE engine)

INFOID:0000000003896867

1.

INSPECTION START

Confirm the malfunctioning system (power valve). Refer to 

EC-353, "Component Function Check (VQ25DE

engine)"

.

Which system is related to the incident?

>> GO TO 2.

2.

CHECK VACUUM EXISTENCE

 With CONSULT-III

1.

Stop engine and disconnect vacuum hose connected to power valve actuator.

2.

Start engine and let it idle.

3.

Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.

4.

Turn VIAS control solenoid valve “ON” and “OFF”, and check vacuum existence under the following condi-
tions.

 Without CONSULT-III

Condition

Operation

Idle

Existed

When revving engine up to 5,000 rpm quickly

Not existed

SEF109L

VIAS S/V

Vacuum

ON

Existed

OFF

Not existed

EC-356

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

VARIABLE INDUCTION AIR SYSTEM

1.

Stop engine and disconnect vacuum hose connected to power valve actuator 1.

2.

Disconnect VIAS control solenoid valve harness connector.

3.

Start engine.

4.

When revving engine up to 5,000 rpm quickly.

5.

Check vacuum existence under the following conditions.

Is the inspection result normal?

YES

>> Repair or replace power valve actuator.

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.

4.

CHECK VACUUM HOSE

1.

Stop engine.

2.

Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to 

EC-93, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair hoses or tubes.

5.

CHECK VIAS CONTROL SOLENOID VALVE

Refer to 

EC-286, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace VIAS control solenoid valve.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "Intermittent Incident"

.

>> INSPECTION END

Condition

Operation

Idle

Existed

When revving engine up to 5,000 rpm quickly

Not existed

SEF109L

ECM

EC-357

< ECU DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ECU DIAGNOSIS

ECM

Reference Value

INFOID:0000000003856868

VALUES ON THE DIAGNOSIS TOOL

Remarks:

l

 Specification data are reference values.

l

 Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show

the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.

Monitor Item

Condition

Values/Status

ENG SPEED

Run engine and compare CONSULT-III value with the tachometer indication.

Almost the same speed as 
the tachometer indication.

MAS A/F SE-B1

See 

EC-124, "Description"

.

B/FUEL SCHDL

See 

EC-124, "Description"

.

A/F ALPHA-B1

See 

EC-124, "Description"

.

A/F ALPHA-B2

See 

EC-124, "Description"

.

COOLAN TEMP/S

• Engine: After warming up

More than 70

°

C (158

°

F)

A/F SEN1 (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

Fluctuates around 2.2 V

A/F SEN1 (B2)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

Fluctuates around 2.2 V

HO2S2 (B1)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

0 - 0.3 V 

←→

 Approx. 0.6 - 

1.0 V

HO2S2 (B2)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

0 - 0.3 V 

←→

 Approx. 0.6 - 

1.0 V

HO2S2 MNTR (B1)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

LEAN 

←→

 RICH

HO2S2 MNTR (B2)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

LEAN 

←→

 RICH

VHCL SPEED SE

• Turn drive wheels and compare CONSULT-III value with the speedometer in-

dication.

Almost the same speed as 
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14 V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0 V

Accelerator pedal: Fully depressed

4.2 - 4.8 V

ACCEL SEN 2*

1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0 V

Accelerator pedal: Fully depressed

4.2 - 4.8 V