Nissan Frontier. Manual - part 387

INSPECTION AND ADJUSTMENT

EC-119

< BASIC INSPECTION >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

 Without CONSULT

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

2. Check idle speed. Refer to 

EC-121, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.

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

EC-262, "Component Description"

.

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

EC-258, "Component Description"

.

OK or NG

OK

>> GO TO 9.

NG

>> 1. Repair or replace.

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-121, "Procedure After Replacing ECM"

.

>> GO TO 4.

10.

CHECK IGNITION TIMING

1. Run engine at idle.

2. Check ignition timing with a timing light. Refer to 

EC-121, "Idle

Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1. Stop engine.

2. Perform 

EC-123, "Accelerator Pedal Released Position Learning"

.

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-123, "Throttle Valve Closed Position Learning"

.

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-124, "Idle Air Volume Learning"

.

M/T: 625 

± 50 rpm (in Neutral position)

A/T: 700 

± 50 rpm (in P or N position)

M/T: 625 

± 50 rpm (in Neutral position)

A/T: 700 

± 50 rpm (in P or N position)

M/T: 15 

± 5° BTDC (in Neutral position)

A/T: 15 

± 5° BTDC (in P or N position)

BBIA0633E

EC-120

< BASIC INSPECTION >

[QR25DE]

INSPECTION AND ADJUSTMENT

Is Idle Air Volume Learning carried out successfully?
Yes or No

Yes

>> GO TO 14.

No

>> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.

14.

CHECK TARGET IDLE SPEED AGAIN

 With CONSULT

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

2. Read idle speed in “DATA MONITOR” mode with CONSULT. Refer to 

EC-121, "Idle Speed and Ignition

Timing Check"

.

 Without CONSULT

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

2. Check idle speed. Refer to 

EC-121, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

15.

CHECK IGNITION TIMING AGAIN

1. Run engine at idle.

2. Check ignition timing with a timing light. Refer to 

EC-121, "Idle

Speed and Ignition Timing Check"

.

OK or NG

OK 

>> GO TO 19.

NG

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to 

EM-46, "Removal and Installation"

.

OK or NG

OK

>> GO TO 17.

NG

>> 1. Repair the timing chain installation.

2. GO TO 4.

17.

DETECT MALFUNCTIONING PART

Check the following.

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

EC-262, "Component Description"

.

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

EC-258, "Component Description"

.

OK or NG

OK

>> GO TO 18.

NG

>> 1. Repair or replace.

2. GO TO 4.

18.

CHECK ECM FUNCTION 

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

although this is rare)

M/T: 625 

± 50 rpm (in Neutral position)

A/T: 700 

± 50 rpm (in P or N position)

M/T: 625 

± 50 rpm (in Neutral position)

A/T: 700 

± 50 rpm (in P or N position)

M/T: 15 

± 5° BTDC (in Neutral position)

A/T: 15 

± 5° BTDC (in P or N position)

BBIA0633E

INSPECTION AND ADJUSTMENT

EC-121

< BASIC INSPECTION >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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

EC-121, "Procedure After Replacing ECM"

.

>> GO TO 4.

19.

INSPECTION END

Did you replace ECM, referring this Basic Inspection procedure?
Yes or No

Yes

>> 1. Perform 

EC-123, "VIN Registration"

.

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000009480756

IDLE SPEED

 With CONSULT

Check idle speed in “DATA MONITOR” mode with CONSULT.

 With GST

Check idle speed in Service $01 with GST.

IGNITION TIMING

Any of following two methods may be used.
1. Attach timing light to loop wire as shown.

2. Check ignition timing.

Procedure After Replacing ECM

INFOID:0000000009480757

DESCRIPTION

When replacing ECM, the following procedure must be performed. (For details, refer to OPERATION PROCE-

DURE.)

PROGRAMMING OPERATION

NOTE:

After replacing with a blank ECM, programming is required to write ECM information. Be sure to follow the pro-

cedure to perform the programming.

OPERATION PROCEDURE

BBIA0644E

BBIA0633E

EC-122

< BASIC INSPECTION >

[QR25DE]

INSPECTION AND ADJUSTMENT

1.

CHECK ECM PART NUMBER

Check ECM part number to see whether it is blank ECM or not.

NOTE:

• Part number of blank ECM is 23703 -

×××××.

• Check the part number when ordering ECM or with the one included in the label on the container box.
Is the ECM a blank ECM?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

SAVE ECM PART NUMBER

Read out the part number from the old ECM and save the number, following the programming instructions.

Refer to “CONSULT Operation Manual”.

NOTE:

• The ECM part number is saved in CONSULT.

• Even when ECM part number is not saved in CONSULT, go to 3.

>> GO TO 3.

3.

PERFORM ECM PROGRAMMING

After replacing ECM, perform the ECM programming. Refer to “CONSULT Operation Manual”.

NOTE:

During programming, maintain the following conditions:

• Ignition switch: ON

• Electric load: OFF

• Brake pedal: Not depressed

• Battery voltage: 12 – 13.5 V (Be sure to check the value of battery voltage by selecting “BATTERY VOLT” in

“Data monitor” of CONSULT.)

>> GO TO 5.

4.

REPLACE ECM

Replace ECM.

>> GO TO 5.

5.

PERFORM INITIALIZATION OF NVIS (NATS) SYSTEM AND REGISTRATION OF ALL NVIS (NATS) IGNI-

TION KEY IDS
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

SEC-3, "Work Flow"

.

>> GO TO 6.

6.

PERFORM VIN REGISTRATION

Perform VIN REGISTRATION. Refer to 

EC-123, "VIN Registration"

.

>> GO TO 7.

7.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform accelerator pedal released position learning. Refer to 

EC-123, "Accelerator Pedal Released Position

Learning"

.

>> GO TO 8.

8.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform throttle valve closed position learning. Refer to 

EC-123, "Throttle Valve Closed Position Learning"

.