Nissan Titan A60. Manual - part 363

EC-118

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

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-119, "VIN Registration"

.

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000006158518

IDLE SPEED

 With CONSULT-III

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

 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:0000000006158519

When replacing ECM, the following procedure must be performed.
1. 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"

.

2. Perform 

EC-119, "VIN Registration"

.

3. Perform 

EC-119, "Accelerator Pedal Released Position Learning"

.

4. Perform 

EC-119, "Throttle Valve Closed Position Learning"

.

5. <Flexible Fuel Vehicle>

Perform 

EC-119, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"

.

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BBIA0379E

INSPECTION AND ADJUSTMENT

EC-119

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6. Perform 

EC-120, "Idle Air Volume Learning"

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VIN Registration

INFOID:0000000006158520

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-III

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

GI-22, "Identification Number"

.

2. Turn ignition switch ON and engine stopped.
3. Select “VIN REGISTRATION” in “WORK SUPPORT” mode.
4. Follow the instruction of CONSULT-III display.

Accelerator Pedal Released Position Learning

INFOID:0000000006158521

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:0000000006158522

DESCRIPTION

Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by

monitoring the throttle position sensor output signal. It must be performed each time harness connector of

electric throttle control actuator or ECM is disconnected.

OPERATION PROCEDURE

1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF wait at least 10 seconds.

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

Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)

INFOID:0000000006158523

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-III

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

EC-120

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

If NG, go to next step.

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

 Without CONSULT-III

1. Turn ignition switch ON.
2. Fully depress the accelerator pedal.
3. Repeat the following procedure quickly for 50 times.
a. Turn ignition switch to START position and immediately return to ON position.
4. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops

blinking and turned ON.

5. Fully release the accelerator pedal.
6. Crank engine and make sure that engine starts.

Idle Air Volume Learning

INFOID:0000000006158524

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 any of 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, make sure 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 12.9V (At idle)

• Engine coolant temperature: 70 - 100

°C (158 - 212°F)

• Select lever: P or N

• Electric load switch: OFF

(Air conditioner, headlamp)

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

start the headlamp will not be illuminated.

• Steering wheel: Neutral (Straight-ahead position)

• Vehicle speed: Stopped

• Transmission: Warmed-up

- With CONSULT-III: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indi-

cates less than 0.9V.

- Without CONSULT-III: Drive vehicle for 10 minutes.

OPERATION PROCEDURE

 With CONSULT-III

1. Perform 

EC-119, "Accelerator Pedal Released Position Learning"

.

2. Perform 

EC-119, "Throttle Valve Closed Position Learning"

.

3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
6. Touch “START” and wait 20 seconds.
7. Make sure that “CMPLT” is displayed on CONSULT-III screen. If “CMPLT” is not displayed, Idle Air Vol-

ume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to

the DIAGNOSTIC PROCEDURE below.

8. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

ITEM

SPECIFICATION

INSPECTION AND ADJUSTMENT

EC-121

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 Without CONSULT-III

NOTE:

• It is better to count the time accurately with a clock.

• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has

a malfunction.

1. Perform 

EC-119, "Accelerator Pedal Released Position Learning"

.

2. Perform 

EC-119, "Throttle Valve Closed Position Learning"

.

3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops

blinking and turned ON.

9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried

out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-

DURE below.

DIAGNOSTIC PROCEDURE

If idle air volume learning cannot be performed successfully, proceed as follows:
1. Check that throttle valve is fully closed.
2. Check PCV valve operation.
3. Check that downstream of throttle valve is free from air leakage.
4. When the above three items check out OK, engine component parts and their installation condi-

tion are questionable. Check and eliminate the cause of the incident. 

It is useful to perform 

EC-128

.

5. If any of the following conditions occur after the engine has started, eliminate the cause of the

incident and perform Idle Air Volume Learning all over again:

• Engine stalls.

• Erroneous idle.

Idle speed

650 

± 50 rpm (in P or N position)

Ignition timing

15 

± 5° BTDC (in P or N position)

ITEM

SPECIFICATION

Idle speed

650 

± 50 rpm (in P or N position)

Ignition timing

15 

± 5° BTDC (in P or N position)

SEC897C