Nissan Maxima. Manual - part 382

EC-12

< BASIC INSPECTION >

[VQ35DE]

DIAGNOSIS AND REPAIR WORK FLOW

13.

PREPARE FOR I/M EXAMINATION

1. Set SRT codes. Refer to  

EC-26, "SRT Set Driving Pattern"

.

2. Erase permanent DTCs. Refer to 

EC-138, "CONSULT Function"

.

>> INSPECTION END

Diagnostic Work Sheet

INFOID:0000000010094771

DESCRIPTION

There are many operating conditions that lead to the malfunction of

engine components. A good grasp of such conditions can make trou-

bleshooting faster and more accurate.

In general, each customer feels differently about symptoms. It is

important to fully understand the symptoms or conditions for a cus-

tomer complaint.

Utilize a diagnostic worksheet like the WORKSHEET SAMPLE

below in order to organize all the information for troubleshooting.

Some conditions may cause the MIL to illuminate or blink, and DTC

to be detected. Examples:

• Vehicle ran out of fuel, which caused the engine to misfire.

• Fuel filler cap was left off or incorrectly screwed on, allowing fuel to

evaporate into the atmosphere.

SEF907L

DIAGNOSIS AND REPAIR WORK FLOW

EC-13

< BASIC INSPECTION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

WORKSHEET SAMPLE

MTBL0017

EC-14

< BASIC INSPECTION >

[VQ35DE]

INSPECTION AND ADJUSTMENT

INSPECTION AND ADJUSTMENT

BASIC INSPECTION
BASIC INSPECTION : Special Repair Requirement

INFOID:0000000010094772

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 leakage

-

Air cleaner clogging

-

Gasket

3. Check that electrical or mechanical loads are not applied.

-

Head lamp 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. Check that no DTC is displayed with CONSULT or GST.
Are any DTCs 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

INSPECTION AND ADJUSTMENT

EC-15

< BASIC INSPECTION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2. Rev engine between 2,000 and 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-19, "IDLE SPEED : Special Repair

Requirement"

.

For specification, refer to 

EC-596, "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-20, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

>> GO TO 5.

5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 6.

6.

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

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-19, "IDLE SPEED : Special Repair Requirement"

.

For specification, refer to 

EC-596, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the Following.

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

EC-301, "Diagnosis Procedure"

.

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

EC-297, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> 1. Repair or replace malfunctioning part.

2. GO TO 4.

9.

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-17, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

>> GO TO 4.

10.

CHECK IGNITION TIMING

1. Run engine at idle.

PBIA8513J