Nissan Maxima. Manual - part 384

EC-20

< BASIC INSPECTION >

[VQ35DE]

INSPECTION AND ADJUSTMENT

2. Check ignition timing.

>> INSPECTION END

VIN REGISTRATION
VIN REGISTRATION : Description

INFOID:0000000010094779

VIN Registration is an operation to register VIN in ECM. It must be performed each time ECM is replaced.

NOTE:

Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).

VIN REGISTRATION : Special Repair Requirement

INFOID:0000000010094780

1.

CHECK VIN

Check the VIN of the vehicle and note it. Refer to 

GI-23, "Identification Number"

.

>> GO TO 2.

2.

PERFORM VIN REGISTRATION

With CONSULT

1. Turn ignition switch ON and engine stopped.

2. Select “VIN REGISTRATION” in “WORK SUPPORT” mode.

3. Follow the instruction of CONSULT display.

>> END

ACCELERATOR PEDAL RELEASED POSITION LEARNING
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Description

INFOID:0000000010094781

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:0000000010094782

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

THROTTLE VALVE CLOSED POSITION LEARNING

JMBIA1135GB

INSPECTION AND ADJUSTMENT

EC-21

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THROTTLE VALVE CLOSED POSITION LEARNING : Description

INFOID:0000000010094783

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 or electric throttle control actuator is cleaned.

THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement

INFOID:0000000010094784

1.

START

 WITH CONSULT

1. Turn ignition switch ON.

2. Select “CLSD THL POS LEARN” in “WORK SUPPORT” mode.

3. Follow the instructions on the CONSULT display.

4. Turn ignition switch OFF and wait at least 10 seconds.

Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

 WITHOUT CONSULT

1. Start the engine.

NOTE:

Engine coolant temperature is 25

°C (77°F) or less before engine starts.

2. Warm up the engine.

NOTE:

Raise engine coolant temperature until it reaches 65

°C (149°F) or more.

3. Turn ignition switch OFF and wait at least 10 seconds.

Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

>> END

IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING : Description

INFOID:0000000010094785

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:0000000010094786

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)

On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is

started the head lamp will not illuminate.

• Steering wheel: Neutral (Straight-ahead position)

• Vehicle speed: Stopped

• Transmission: Warmed-up

- With CONSULT: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “CVT” system indicates

less than 0.9 V.

- Without CONSULT: Drive vehicle for 10 minutes.
Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM IDLE AIR VOLUME LEARNING

EC-22

< BASIC INSPECTION >

[VQ35DE]

INSPECTION AND ADJUSTMENT

With CONSULT

1. Perform 

EC-20, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

2. Perform 

EC-21, "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 screen?

YES

>> GO TO 4.

NO

>> GO TO 5.

3.

PERFORM IDLE AIR VOLUME LEARNING

Without CONSULT

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-20, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

2. Perform 

EC-21, "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 for approx. 20 seconds until the MIL stops blinking

and turns ON.

8. Fully release the accelerator pedal within 3 seconds after the MIL 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 two or three times and check that idle speed and ignition timing are within the specifica-

tions.

For procedure, refer to 

EC-19, "IDLE SPEED : Special Repair Requirement"

 and 

EC-19, "IGNITION TIMING :

Special Repair Requirement"

.

For specifications, refer to 

EC-596, "Idle Speed"

 and 

EC-596, "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.

SEC897C

INSPECTION AND ADJUSTMENT

EC-23

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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-149, "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 again:

• Engine stalls.

• Incorrect idle.

>> INSPECTION END

EXHAUST VALVE TIMING CONTROL LEARNING
EXHAUST VALVE TIMING CONTROL LEARNING : Description

INFOID:0000000010094787

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:0000000010094788

1.

START

With CONSULT

1. Start engine and warm it up to normal operating temperature.

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

applied.

-

Headlamp switch is OFF

-

Air conditioner switch is OFF

-

Rear window 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.

5. Touch “START” and wait 20 seconds.

6. Check that “CMPLT” is displayed on CONSULT screen.

Without CONSULT

1. Start engine and warm it up to normal operating temperature.

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

applied.

-

Headlamp switch is OFF

-

Air conditioner switch is OFF

-

Rear window 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

Learning completed

: CMPLT

Learning not yet

: YET