Nissan Teana J32. Manual - part 369

 

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Nissan Teana J32. Manual - part 369

 

 

EC-14

< BASIC INSPECTION >

[VQ25DE, VQ35DE]

INSPECTION AND ADJUSTMENT

2.

GO TO 4.

18.

CHECK ECM FUNCTION 

1.

Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)

2.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

EC-14, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

>> GO TO 4.

19.

INSPECTION END

Did you replace ECM, referring this Basic Inspection procedure?

Yes or No

Yes

>> Go to 

EC-14, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair

Requirement"

.

No

>> INSPECTION END

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description

INFOID:0000000003856445

When replacing ECM, the following procedure must be performed.

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement

INFOID:0000000003856446

1.

PERFORM INITIALIZATION OF NVIS (NATS) SYSTEM AND REGISTRATION OF ALL NVIS (NATS) IGNI-

TION KEY IDS

Refer to 

SEC-8, "ECM RE-COMMUNICATING FUNCTION : Description"

.

>> GO TO 2.

2.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Refer to 

EC-15, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 3.

3.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 4.

4.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-16, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

IDLE SPEED

IDLE SPEED : Description

INFOID:0000000003856447

This describes how to check the idle speed. For the actual procedure, follow the instructions in “BASIC
INSPECTION”.

IDLE SPEED : Special Repair Requirement

INFOID:0000000003856448

1.

CHECK IDLE SPEED

With CONSULT-III

INSPECTION AND ADJUSTMENT

EC-15

< BASIC INSPECTION >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Check idle speed in “DATA MONITOR” mode with CONSULT-III.

With GST

Check idle speed with Service $01 of GST.

>> INSPECTION END

IGNITION TIMING

IGNITION TIMING : Description

INFOID:0000000003856449

This describes how to check the ignition timing. For the actual procedure, follow the instructions in “BASIC
INSPECTION”.

IGNITION TIMING : Special Repair Requirement

INFOID:0000000003856450

1.

CHECK IGNITION TIMING

1.

Attach timing light to loop wires as shown.

2.

Check ignition timing.

>> INSPECTION END

ACCELERATOR PEDAL RELEASED POSITION LEARNING

ACCELERATOR PEDAL RELEASED POSITION LEARNING : Description

INFOID:0000000003856453

Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
the harness connector of the accelerator pedal position sensor or ECM is disconnected.

ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Re-
quirement

INFOID:0000000003856454

1.

START

1.

Check that accelerator pedal is fully released.

2.

Turn ignition switch ON and wait at least 2 seconds.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Turn ignition switch ON and wait at least 2 seconds.

5.

Turn ignition switch OFF and wait at least 10 seconds.

>> END

A

: Timing light

: Vehicle front

JMBIA1388ZZ

JMBIA1135GB

EC-16

< BASIC INSPECTION >

[VQ25DE, VQ35DE]

INSPECTION AND ADJUSTMENT

THROTTLE VALVE CLOSED POSITION LEARNING

THROTTLE VALVE CLOSED POSITION LEARNING : Description

INFOID:0000000003856455

Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.

THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement

INFOID:0000000003856456

1.

START

1.

Check that accelerator pedal is fully released.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.
Check that throttle valve moves during above 10 seconds by confirming the operating sound.

>> END

IDLE AIR VOLUME LEARNING

IDLE AIR VOLUME LEARNING : Description

INFOID:0000000003856457

Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within
the specific range. It must be performed under the following conditions:
• Each time electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of specification.

IDLE AIR VOLUME LEARNING : Special Repair Requirement

INFOID:0000000003856458

1.

PRECONDITIONING

Before performing Idle Air Volume Learning, check that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
• Battery voltage: More than 12.9 V (At idle)
• Engine coolant temperature: 70 - 100

°

C (158 - 212

°

F)

• Selector lever: P or N
• Electric load switch: OFF

(Air conditioner, head lamp, rear window defogger)

For vehicle equipped with daytime light systems, perform one of the following procedures before

starting engine not to illuminate headlamps.

• Apply parking brake
• Set lighting switch to the 1st position
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “CVT” system indi-

cates less than 0.9 V.

- Without CONSULT-III: Drive vehicle for 10 minutes.

Will CONSULT-III be used?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM IDLE AIR VOLUME LEARNING

With CONSULT-III

1.

Perform 

EC-15, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

2.

Perform 

EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

3.

Start engine and warm it up to normal operating temperature.

4.

Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

5.

Touch “START” and wait 20 seconds.

INSPECTION AND ADJUSTMENT

EC-17

< BASIC INSPECTION >

[VQ25DE, VQ35DE]

C

D

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F

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L

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A

EC

N

P

O

Is “CMPLT” displayed on CONSULT-III screen?

YES

>> GO TO 4.

NO

>> GO TO 5.

3.

PERFORM IDLE AIR VOLUME LEARNING

Without CONSULT-III

NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has

a malfunction.

1.

Perform 

EC-15, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

2.

Perform 

EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

3.

Start engine and warm it up to normal operating temperature.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

6.

Repeat the following procedure quickly 5 times within 5 seconds.

-

Fully depress the accelerator pedal.

-

Fully release the accelerator pedal.

7.

Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MI stops blinking and
turns ON.

8.

Fully release the accelerator pedal within 3 seconds after the MI turns ON.

9.

Start engine and let it idle.

10. Wait 20 seconds.

>> GO TO 4.

4.

CHECK IDLE SPEED AND IGNITION TIMING

Rev up the engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.
For procedure, refer to 

EC-14, "IDLE SPEED : Special Repair Requirement"

 and 

EC-15, "IGNITION TIMING :

Special Repair Requirement"

.

For specifications, refer to 

EC-414, "Idle Speed"

 and 

EC-414, "Ignition Timing"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART-I

Check the following
• Check that throttle valve is fully closed.
• Check PCV valve operation.
• Check that downstream of throttle valve is free from air leakage.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

DETECT MALFUNCTIONING PART-II

When the above three items check out OK, engine component parts and their installation condition are ques-
tionable. Check and eliminate the cause of the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to 

EC-124, "Description"

.

PBIB0665E

 

 

 

 

 

 

 

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