Nissan Frontier D40. Manual - part 333

INSPECTION AND ADJUSTMENT

EC-23

< BASIC INSPECTION >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

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

EC-23, "Procedure After Replacing ECM"

.

>> GO TO 4.

19.

INSPECTION END

Did you replace ECM, referring this Basic Inspection procedure?

Yes or No

Yes

>> 1.

Perform 

EC-24, "VIN Registration"

.

2.

INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000005273020

IDLE SPEED

 With CONSULT-III

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

 With GST

Check idle speed in Service $01 with GST.

IGNITION TIMING

Any of following two methods may be used.
1.

Attach timing light to loop wire as shown.

2.

Check ignition timing.

Procedure After Replacing ECM

INFOID:0000000005273021

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-24, "VIN Registration"

.

3.

Perform 

EC-24, "Accelerator Pedal Released Position Learning"

.

4.

Perform 

EC-24, "Throttle Valve Closed Position Learning"

.

5.

Perform 

EC-24, "Idle Air Volume Learning"

.

BBIA0644E

BBIA0633E

EC-24

< BASIC INSPECTION >

[QR25DE]

INSPECTION AND ADJUSTMENT

VIN Registration

INFOID:0000000005273022

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

EC-24, "VIN Registration"

 .

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:0000000005273023

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.

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:0000000005273024

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

Idle Air Volume Learning

INFOID:0000000005273025

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 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 - 95

°

C (158 - 212

°

F)

• Selector lever position: P or N (A/T), Neutral (M/T)
• Electric load switch: OFF

(Air conditioner, headlamp)

INSPECTION AND ADJUSTMENT

EC-25

< BASIC INSPECTION >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not be illuminated.

• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- A/T models
• 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.
- M/T models: Drive vehicle for 10 minutes.

OPERATION PROCEDURE

 With CONSULT-III

1.

Perform 

EC-24, "Accelerator Pedal Released Position Learning"

.

2.

Perform 

EC-24, "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. Refer to 

EC-23, "Idle Speed and Ignition Timing Check"

.

 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-24, "Accelerator Pedal Released Position Learning"

.

2.

Perform 

EC-24, "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 5 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 for approx. 20 seconds until the MIL stops blinking
and turns ON.

9.

Fully release the accelerator pedal within 3 seconds after the MIL turns ON.

10. Start engine and let it idle.

ITEM

SPECIFICATION

Idle speed

M/T: 625 

±

 50 rpm (in Neutral position)

A/T: 700 

±

 50 rpm (in P or N position)

Ignition timing

M/T: 15 

±

 5

°

 BTDC (in Neutral position)

A/T: 15 

±

 5

°

 BTDC (in P or N position)

EC-26

< BASIC INSPECTION >

[QR25DE]

INSPECTION AND ADJUSTMENT

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. Refer to 

EC-23, "Idle Speed and Ignition Timing Check"

.

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-79

.

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

M/T: 625 

±

 50 rpm (in Neutral position)

A/T: 700 

±

 50 rpm (in P or N position)

Ignition timing

M/T: 15 

±

 5

°

 BTDC (in Neutral position)

A/T: 15 

±

 5

°

 BTDC (in P or N position)

SEC897C