Nissan Altima L32. Instruction — part 226

INSPECTION AND ADJUSTMENT

EC-25

< BASIC INSPECTION >

[QR25DE FOR CALIFORNIA]

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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-28, "IDLE SPEED : Special Repair

Requirement"

.

For specification, refer to

EC-555, "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-29, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

>> GO TO 5.

5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-29, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 6.

6.

PERFORM IDLE AIR VOLUME LEARNING

Perform

EC-30, "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-28, "IDLE SPEED : Special Repair Requirement"

.

For specification, refer to

EC-555, "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-282, "DTC Logic"

.

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

EC-278, "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 of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

EC-27, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

>> GO TO 4.

10.

CHECK IGNITION TIMING

1. Run engine at idle.

PBIA8513J

EC-26

< BASIC INSPECTION >

[QR25DE FOR CALIFORNIA]

INSPECTION AND ADJUSTMENT

2. Check ignition timing with a timing light.

For procedure, refer to

EC-28, "IGNITION TIMING : Special

Repair Requirement"

.

For specification, refer to

EC-555, "Ignition Timing"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1. Stop engine.

2. Perform

EC-29, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-29, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Perform

EC-30, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

Is Idle Air Volume Learning carried out successfully?

YES

>> GO TO 14.

NO

>> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.

14.

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-28, "IDLE SPEED : Special Repair Requirement"

.

For specification, refer to

EC-555, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> GO TO 17.

15.

CHECK IGNITION TIMING AGAIN

1. Run engine at idle.

2. Check ignition timing with a timing light.

For procedure, refer to

EC-28, "IGNITION TIMING : Special

Repair Requirement"

.

For specification, refer to

EC-555, "Ignition Timing"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to

EM-52, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair the timing chain installation. Then GO TO 4.

1

: Timing indicator

ALBIA0048ZZ

1

: Timing indicator

ALBIA0048ZZ

INSPECTION AND ADJUSTMENT

EC-27

< BASIC INSPECTION >

[QR25DE FOR CALIFORNIA]

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17.

DETECT MALFUNCTIONING PART

Check the following.

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

EC-282, "DTC Logic"

.

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

EC-278, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair or replace. Then GO TO 4.

18.

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

EC-27, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

>> GO TO 4.

19.

INSPECTION END

If ECM is replaced during this BASIC INSPECTION procedure, go to

EC-27, "ADDITIONAL SERVICE WHEN

REPLACING CONTROL UNIT : Special Repair Requirement"

.

>> INSPECTION END

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description

INFOID:0000000004349127

When replacing ECM, this procedure must be performed.

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

INFOID:0000000004349128

1.

PERFORM INITIALIZATION OF NATS SYSTEM AND REGISTRATION OF ALL NATS IGNITION KEY IDS

Refer to

SEC-15, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(Coupe) or

SEC-

214, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

(Sedan).

>> GO TO 2.

2.

PERFORM VIN REGISTRATION

Refer to

EC-29, "VIN REGISTRATION : Special Repair Requirement"

.

>> GO TO 3.

3.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Refer to

EC-29, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 4.

4.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to

EC-29, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 5.

5.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-30, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

EC-28

< BASIC INSPECTION >

[QR25DE FOR CALIFORNIA]

INSPECTION AND ADJUSTMENT

IDLE SPEED
IDLE SPEED : Description

INFOID:0000000004349129

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

INSPECTION”.

IDLE SPEED : Special Repair Requirement

INFOID:0000000004349130

1.

CHECK IDLE SPEED

With CONSULT-III

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:0000000004349131

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

INSPECTION”.

IGNITION TIMING : Special Repair Requirement

INFOID:0000000004349132

1.

CHECK IGNITION TIMING

1. Attach timing light to No. 1 igniton coil (1) wire as shown.

2. Check ignition timing.

>> INSPECTION END

VIN REGISTRATION
VIN REGISTRATION : Description

INFOID:0000000004349133

VIN Registration is an operation to registering 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).

2

: Timing light

: Vehicle front

ALBIA0065ZZ

1

: Timing indicator

ALBIA0048ZZ