Infiniti EX35. Manual - part 569

 

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Infiniti EX35. Manual - part 569

 

 

EC-18

< BASIC INSPECTION >

[VQ35HR]

INSPECTION AND ADJUSTMENT

• 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:0000000003133242

1.

PRECONDITIONING

Make sure 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 12.9V (At idle)
• Engine coolant temperature: 70 - 105

°

C (158 - 221

°

F)

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

(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not be illuminated.

• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indi-

cates less than 0.9V.

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

Do you have CONSULT-III?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM IDLE AIR VOLUME LEARNING

With CONSULT-III

1.

Perform Accelerator Pedal Released Position Learning. Refer to 

EC-17, "ACCELERATOR PEDAL

RELEASED POSITION LEARNING : Special Repair Requirement"

.

2.

Perform Throttle Valve Closed Position Learning. 

EC-17, "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.

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 Accelerator Pedal Released Position Learning. Refer to 

EC-17, "ACCELERATOR PEDAL

RELEASED POSITION LEARNING : Special Repair Requirement"

.

2.

Perform Throttle Valve Closed Position Learning. 

EC-17, "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 five times within 5 seconds.

-

Fully depress the accelerator pedal.

-

Fully release the accelerator pedal.

7.

Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.

8.

Fully release the accelerator pedal within 3 seconds after the MIL turned ON.

9.

Start engine and let it idle.

INSPECTION AND ADJUSTMENT

EC-19

< BASIC INSPECTION >

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10. Wait 20 seconds.

>> GO TO 4.

4.

CHECK IDLE SPEED AND IGNITION TIMING

Rev up the engine two or three times and check that idle speed and ignition timing are within the specifica-
tions. Refer to 

EC-543, "Idle Speed"

 and 

EC-543, "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

Engine component parts and their installation condition are questionable. Check and eliminate the cause of
the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to 

EC-125, "Description"

.

If any of the following conditions occur after the engine has started, eliminate the cause of the incident and
perform Idle Air Volume Learning all over again:
• Engine stalls.
• Erroneous idle.

>> INSPECTION END

EXHAUST VALVE TIMING CONTROL LEARNING

EXHAUST VALVE TIMING CONTROL LEARNING : Description

INFOID:0000000003133243

Exhaust Valve Timing Control Learning is a function of ECM to learn the characteristic of exhaust valve timing
control magnet retarder by comparing the target angle of exhaust camshaft with the actual retarded angle of
exhaust camshaft. It must be performed each time exhaust valve timing control magnet retarder is discon-
nected or replaced, or ECM is replaced.

EXHAUST VALVE TIMING CONTROL LEARNING : Special Repair Requirement

INFOID:0000000003133244

1.

START

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Set selector lever to N position and confirm that following electrical or mechanical loads are not applied.

-

Headlamp switch is OFF

-

Air conditioner switch is OFF

SEC897C

EC-20

< BASIC INSPECTION >

[VQ35HR]

INSPECTION AND ADJUSTMENT

-

Rear defogger switch is OFF

-

Steering wheel is in the straight-ahead position, etc.

3.

Keep the engine speed between 1,800 and 2,000 rpm.

4.

Select “EXH V/T CONTROL LEARN” in “WORK SUPPORT” mode with CONSULT-III.

5.

Touch “START” and wait 20 seconds.

6.

Check that “CMPLT” is displayed on CONSULT-III screen.

Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Set selector lever to N position and confirm that following electrical or mechanical loads are not applied.

-

Headlamp switch is OFF

-

Air conditioner switch is OFF

-

Rear defogger switch is OFF

-

Steering wheel is in the straight-ahead position, etc.

3.

Keep the engine speed between 1,800 and 2,000 rpm at 20 seconds.

>> END

MIXTURE RATIO SELF-LEARNING VALUE CLEAR

MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Description

INFOID:0000000003133245

This describes how to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.

MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Special Repair Requirement

INFOID:0000000003133246

1.

START

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-III.

3.

Clear mixture ratio self-learning value by touching “CLEAR”.

With GST

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF.

3.

Disconnect mass air flow sensor (bank 1) harness connector.

4.

Restart engine and let it idle for at least 5 seconds.

5.

Stop engine and reconnect mass air flow sensor (bank 1) harness connector.

6.

Select Service $03 with GST. Check DTC P0102 is detected.

7.

Select Service $04 with GST to erase the DTC P0102.

>> END

Learning completed

: CMPLT

Learning not yet

: YET

ENGINE CONTROL SYSTEM

EC-21

< FUNCTION DIAGNOSIS >

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FUNCTION DIAGNOSIS

ENGINE CONTROL SYSTEM

System Diagram

INFOID:0000000003133247

1.

ECM

2.

Data link connector

3.

MIL

4.

Ignition switch

5.

Cooling fan control module

6.

Cooling fan

7.

PNP signal

8.

A/F sensor 1

9.

Heated oxygen sensor 2

10. Exhaust valve timing control magnet 

retarder

11.

Exhaust valve timing control position 
sensor

12. PCV valve

13. Spark plug

14. Camshaft position sensor (PHASE)

15. Intake valve timing control solenoid 

valve

16. Fuel injector

17. Engine coolant temperature sensor

18. Fuel injector

19. Intake valve timing control solenoid 

valve

20. Camshaft position sensor (PHASE)

21. Spark plug

JMBIA1269GB

 

 

 

 

 

 

 

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