Nissan Frontier. Manual - part 625

INSPECTION AND ADJUSTMENT

EC-1071

< BASIC INSPECTION >

[VQ40DE FOR MEXICO]

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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-1072, "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-1072, "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-1072, "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-176, "Exploded View"

.

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-1201, "Diagnosis Procedure"

.

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

EC-1196, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 18.

NG

>> 1. Repair or replace.

2. GO TO 4.

18.

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

SEC-7, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

>> GO TO 4.

19.

INSPECTION END

625 

± 50 rpm (in P or N position)

625 

± 50 rpm (in P or N position)

15 

± 5° BTDC (in P or N position)

BBIA0531E

EC-1072

< BASIC INSPECTION >

[VQ40DE FOR MEXICO]

INSPECTION AND ADJUSTMENT

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

Yes

>> 1. Perform 

EC-1074, "VIN Registration"

.

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000009481714

IDLE SPEED

With CONSULT

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

With GST

Check idle speed with GST.

IGNITION TIMING

1. Attach timing light to loop wire as shown.

2. Check ignition timing.

Any of following two methods may be used.

Additional Service When Replacing ECM

INFOID:0000000009481715

DESCRIPTION

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

WORK PROCEDURE

1.

SAVE ECM DATA

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Turn ignition switch ON.

4. Select “SAVING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

BBIA0530E

BBIA0531E

INSPECTION AND ADJUSTMENT

EC-1073

< BASIC INSPECTION >

[VQ40DE FOR MEXICO]

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5. Follow the instruction of CONSULT display.

NOTE:

• Necessary data in ECM is copied and saved to CONSULT.

• Go to Step 2 regardless of with or without success in saving data.

>> GO TO 2.

2.

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

YES

>> GO TO 3.

NO

>> GO TO 5.

3.

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 4.

>> GO TO 4.

4.

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 6.

5.

REPLACE ECM

Replace ECM.

>> GO TO 6.

6.

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

TION KEY IDS

Refer to 

SEC-7, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-

ment"

.

>> GO TO 7.

7.

CHECK ECM DATA STATUS

Check if the data is successfully copied from the ECM at Step 1 (before replacement) and saved in CONSULT.
Is the data saved successfully?

YES

>> GO TO 8.

NO

>> GO TO 9.

8.

WRITE ECM DATA

With CONSULT

EC-1074

< BASIC INSPECTION >

[VQ40DE FOR MEXICO]

INSPECTION AND ADJUSTMENT

1. Select “WRITING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

2. Follow the instruction of CONSULT display.

NOTE:

The data saved by “SAVING DATA FOR REPLC CPU” is written to ECM.

>> GO TO 10.

9.

PERFORM VIN REGISTRATION

Refer to 

EC-1074, "VIN Registration"

.

>> GO TO 10.

10.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform accelerator pedal released position learning. Refer to 

EC-1074, "Accelerator Pedal Released Position

Learning"

.

>> GO TO 11.

11.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform throttle valve closed position learning. Refer to 

EC-1075, "Throttle Valve Closed Position Learning"

.

>> GO TO 12.

12.

PERFORM IDLE AIR VOLUME LEARNING

Perform idle air volume learning. Refer to 

EC-1075, "Idle Air Volume Learning"

.

>> END

VIN Registration

INFOID:0000000009481716

DESCRIPTION

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

OPERATION PROCEDURE

1.

CHECK VIN

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

GI-24, "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 of “ENGINE”.

3. Follow the instruction of CONSULT display.

>> END

Accelerator Pedal Released Position Learning

INFOID:0000000009481717

DESCRIPTION

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.

OPERATION PROCEDURE

1. Check that accelerator pedal is fully released.