Nissan Titan. Manual - part 206

INSPECTION AND ADJUSTMENT

EC-125

< BASIC INSPECTION >

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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

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

.

>> GO TO 4.

21.

INSPECTION END

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

Yes

>> 1. Perform 

EC-125, "Procedure After Replacing ECM"

.

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000009886523

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.

Procedure After Replacing ECM

INFOID:0000000010135274

DESCRIPTION

When replacing ECM, the following procedure must be performed.

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

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EC-126

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INSPECTION AND ADJUSTMENT

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

.

>> 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?

INSPECTION AND ADJUSTMENT

EC-127

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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-127, "VIN Registration"

.

>> GO TO 10.

10.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform Accelerator Pedal Released Position Learning. Refer to 

EC-128, "Accelerator Pedal Released Posi-

tion Learning"

.

>> GO TO 11.

11.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform Throttle Valve Closed Position Learning. Refer to 

EC-128, "Throttle Valve Closed Position Learning"

.

>> GO TO 12.

12.

CHECK THE VEHICLE’S FUEL TYPE

Check the vehicle information. Refer to 

GI-22, "Model Variation"

.

Is the vehicle a Flexible Fuel Vehicle?

YES

>> GO TO 13.

NO

>> GO TO 14.

13.

PERFORM ETHANOL MIXTURE RATIO ADAPTATION

Perform 

EC-128, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"

.

>> GO TO 14.

14.

PERFORM IDLE AIR VOLUME LEARNING

Perform Idle Air Volume Learning. Refer to 

EC-129, "Idle Air Volume Learning"

.

>> END

VIN Registration

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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

 With CONSULT

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

GI-24, "Identification Number"

.

2. Turn ignition switch ON and engine stopped.
3. Select “VIN REGISTRATION” in “WORK SUPPORT” mode of “ENGINE”.

EC-128

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INSPECTION AND ADJUSTMENT

4. Follow the instruction of CONSULT display.

Accelerator Pedal Released Position Learning

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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 accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE

1. Make sure 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:0000000009886527

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.

Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)

INFOID:0000000009886528

DESCRIPTION

Ethanol mixture ratio adaptation is an operation to change the ethanol mixture ratio presumed by ECM. It must

be performed when engine does not start after replacing ECM. It is not necessary to be performed when

engine can start.

OPERATION PROCEDURE

 With CONSULT

1. Turn ignition switch ON.
2. Select “ETHANOL M/R ADJ” in “WORK SUPPORT” mode with CONSULT, then touch “START”.
3. Select “E35” and then touch “UPDATE”.
4. Crank engine and make sure that engine starts.

If NG, go to next step.

5. Select “E70” and then touch “UPDATE”.
6. Crank engine and make sure that engine starts.