Nissan Versa Sedan. Instruction - part 282

IDLE AIR VOLUME LEARNING

EC-127

< BASIC INSPECTION >

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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.

10. Wait 20 seconds.

>> GO TO 4.

4.

CHECK IDLE SPEED AND IGNITION TIMING

Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifi-

cations.

For specification, refer to 

EC-464, "Idle Speed"

 and 

EC-464, "Ignition Timing"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

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

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-147, "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

PBIB0665E

EC-128

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MIXTURE RATIO SELF-LEARNING VALUE CLEAR

MIXTURE RATIO SELF-LEARNING VALUE CLEAR

Description

INFOID:0000000009267039

This describes how to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-

tions in “Diagnosis Procedure”.

Work Procedure

INFOID:0000000009267040

1.

START

With CONSULT

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

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

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 harness connector.

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

5. Stop engine and reconnect mass air flow sensor harness connector.

6. Select Service $03 with GST. Make sure DTC P0102 is detected.

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

>> END

BASIC INSPECTION

EC-129

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BASIC INSPECTION

Work Procedure

INFOID:0000000009267041

1.

INSPECTION START

1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for

scheduled maintenance.

2. Open engine hood and check the following:

-

Harness connectors for improper connections

-

Wiring harness for improper connections, pinches and cut

-

Vacuum hoses for splits, kinks and improper connections

-

Hoses and ducts for leaks

-

Air cleaner clogging

-

Gasket

3. Confirm that 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.

4. Start engine and warm it up until engine coolant temperature

indicator points to the middle of gauge.

Ensure engine stays below 1,000 rpm.

5. Run engine at about 2,000 rpm for about 2 minutes under no

load.

6. Make sure that no DTC is displayed with CONSULT or GST.
Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3

3.

CHECK TARGET IDLE SPEED

1. Run engine at about 2,000 rpm for about 2 minutes under no load.

SEF983U

SEF976U

SEF977U

EC-130

< BASIC INSPECTION >

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BASIC INSPECTION

2. Rev engine (2,000 to 3,000 rpm) two or three times under no

load, then run engine at idle speed for about 1 minute.

3. Check idle speed.

For procedure, refer to 

EC-457, "Inspection"

.

For specification, refer to 

EC-464, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 4.

4.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1. Stop engine.

2. Perform 

EC-124, "Work Procedure"

.

>> GO TO 5.

5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-125, "Work Procedure"

.

>> GO TO 6.

6.

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-126, "Work Procedure"

.

Is Idle Air Volume Learning carried out successfully?

YES

>> GO TO 7.

NO

>> Follow the instruction of IDLE AIR VOLUME LEARNING. Then GO TO 4.

7.

CHECK TARGET IDLE SPEED AGAIN

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

2. Check idle speed.

For procedure, refer to 

EC-457, "Inspection"

.

For specification, refer to 

EC-464, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the Following.

• Check intake camshaft position sensor (PHASE) and circuit. Refer to 

EC-276, "DTC Logic"

.

• Check crankshaft position sensor (POS) and circuit. Refer to 

EC-272, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace. Then GO TO 4.

9.

CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but

this is a rare case.)

2. Perform initialization and registration of all NATS ignition key IDs. Refer to 

SEC-50, "ECM : Work Proce-

dure"

 (WITH INTELLIGENT KEY SYSTEM) or 

SEC-129, "ADDITIONAL SERVICE WHEN REPLACING

CONTROL UNIT : Special Repair Requirement"

 (WITHOUT INTELLIGENT KEY SYSTEM).

>> GO TO 4.

10.

CHECK IGNITION TIMING

1. Run engine at idle.

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