Nissan Titan. Manual - part 207

INSPECTION AND ADJUSTMENT

EC-129

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Without CONSULT

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:0000000009886529

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: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indicates

less than 0.9V.

- Without CONSULT: Drive vehicle for 10 minutes.

OPERATION PROCEDURE

With CONSULT

1. Perform

EC-128, "Accelerator Pedal Released Position Learning"

2. Perform

EC-128, "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 screen. If “CMPLT” is not displayed, Idle Air Volume

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.

Without CONSULT

NOTE:

ITEM

SPECIFICATION

Idle speed

650

± 50 rpm (in P or N position)

Ignition timing

± 5° BTDC (in P or N position)

EC-130

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INSPECTION AND ADJUSTMENT

• 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-128, "Accelerator Pedal Released Position Learning"

2. Perform

EC-128, "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-143

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.

ITEM

SPECIFICATION

Idle speed

650

± 50 rpm (in P or N position)

Ignition timing

± 5° BTDC (in P or N position)

SEC897C

HOW TO SET SRT CODE

EC-131

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HOW TO SET SRT CODE

Description

INFOID:0000000009886530

OUTLINE

In order to set all SRTs, the self-diagnoses as in the “SRT ITEM” table must have been performed at least

once. Each diagnosis may require actual driving for a long period of time under various conditions.

SRT ITEM

The table below shows required self-diagnostic items to set the SRT to “CMPLT”.

*: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT.

SRT SERVICE PROCEDURE

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review

the flowchart diagnostic sequence, referring to the following flowchart.

SRT item

(CONSULT indication)

Performance

Priority*

Required self-diagnostic items to set the SRT to “CMPLT”

Corresponding

DTC No.

CATALYST

Three way catalyst function

P0420, P0430

EVAP SYSTEM

EVAP control system purge flow monitoring

P0441

EVAP control system

P0442

EVAP control system

P0456

HO2S

Air fuel ratio (A/F) sensor 1

P0133, P0153

Heated oxygen sensor 2

P0137, P0157

Heated oxygen sensor 2

P0138, P0158

Heated oxygen sensor 2

P0139, P0159

EC-132

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HOW TO SET SRT CODE

SRT Set Driving Pattern

INFOID:0000000009886531

CAUTION:

JSBIA0400GB

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