Nissan Xterra. Manual - part 249

EC-122

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INSPECTION AND ADJUSTMENT

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

SEC-7, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

.

>> GO TO 4.

19.

INSPECTION END

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

Yes

>> 1. Perform 

EC-124, "VIN Registration"

.

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000009483808

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.

Additional Service When Replacing ECM

INFOID:0000000009483809

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

BBIA0530E

BBIA0531E

INSPECTION AND ADJUSTMENT

EC-123

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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.

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.

EC-124

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INSPECTION AND ADJUSTMENT

Is the data saved successfully?

YES

>> GO TO 8.

NO

>> GO TO 9.

8.

WRITE ECM DATA

With CONSULT

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-124, "VIN Registration"

.

>> GO TO 10.

10.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform accelerator pedal released position learning. Refer to 

EC-125, "Accelerator Pedal Released Position

Learning"

.

>> GO TO 11.

11.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform throttle valve closed position learning. Refer to 

EC-125, "Throttle Valve Closed Position Learning"

.

>> GO TO 12.

12.

PERFORM IDLE AIR VOLUME LEARNING

Perform idle air volume learning. Refer to 

EC-125, "Idle Air Volume Learning"

.

>> END

VIN Registration

INFOID:0000000009483810

DESCRIPTION

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).

OPERATION PROCEDURE

1.

CHECK VIN

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

GI-23, "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

INSPECTION AND ADJUSTMENT

EC-125

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Accelerator Pedal Released Position Learning

INFOID:0000000009483811

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

harness connector of the accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE

1. Check that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.

Throttle Valve Closed Position Learning

INFOID:0000000009483812

DESCRIPTION

Throttle Valve Closed Position Learning is a function of ECM to learn the fully closed position of the throttle

valve by monitoring the throttle position sensor output signal. It must be performed each time the harness con-

nector of the electric throttle control actuator or ECM is disconnected or electric throttle control actuator inside

is cleaned.

OPERATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

2. Select “CLSD THL POS LEARN” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

3. Follow the instructions on the CONSULT display.

4. Turn ignition switch OFF and wait at least 10 seconds.

Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

Without CONSULT

1. Start the engine.

NOTE:

Engine coolant temperature is 25

°C (77°F) or less before engine starts.

2. Warm up the engine.

NOTE:

Raise engine coolant temperature until it reaches 65

°C (149°F) or more.

3. Turn ignition switch OFF and wait at least 10 seconds.

Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

INFOID:0000000009483813

DESCRIPTION

Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific

range. It must be performed under the following conditions:

• Each time electric throttle control actuator or ECM is replaced.

• Idle speed or ignition timing is out of specification.

PREPARATION

Before performing Idle Air Volume Learning, check that all of the following conditions are satisfied.

Learning will be cancelled if any of the following conditions are missed for even a moment.

• Battery voltage: More than 12.9 V (At idle)

• Engine coolant temperature: 70 - 100

°C (158 - 212°F)

• PNP switch (M/T): ON

Selector lever (A/T): P or N

• Electric load switch: OFF

(Air conditioner, headlamp, rear window defogger)

On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is

started the headlamp will not  illuminate.

• Steering wheel: Neutral (Straight-ahead position)

• Vehicle speed: Stopped