Nissan Frontier D40. Manual - part 445

INSPECTION AND ADJUSTMENT

EC-471

< BASIC INSPECTION >

[VQ40DE]

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Yes or No

Yes

>> GO TO 14.

No

>> 1.

Follow the instruction of Idle Air Volume Learning.

2.

GO TO 4.

14.

CHECK TARGET IDLE SPEED AGAIN

 With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Read idle speed in “DATA MONITOR” mode with CONSULT-III.
Refer to 

EC-472, "Idle Speed and Ignition Timing Check"

.

 Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed. Refer to 

EC-472, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

15.

CHECK IGNITION TIMING AGAIN

1.

Run engine at idle.

2.

Check ignition timing with a timing light.
Refer to 

EC-472, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to 

EM-173, "Removal and Installation"

.

OK or NG

OK

>> GO TO 17.

NG

>> 1.

Repair the timing chain installation.

2.

GO TO 4.

17.

DETECT MALFUNCTIONING PART

Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to 

EC-672, "Diagnosis Procedure"

.

• Check crankshaft position sensor (POS) and circuit. Refer to 

EC-667, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 18.

NG

>> 1.

Repair or replace.

2.

GO TO 4.

18.

CHECK ECM FUNCTION 

1.

Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)

M/T: 625 

±

 50 rpm (in Neutral position)

A/T: 625 

±

 50 rpm (in P or N position)

M/T: 625 

±

 50 rpm (in Neutral position)

A/T: 625 

±

 50 rpm (in P or N position)

M/T: 15

±

 5

°

 BTDC (in Neutral position)

A/T: 15 

±

 5

°

 BTDC (in P or N position)

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EC-472

< BASIC INSPECTION >

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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, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : 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-473, "VIN Registration"

.

2.

INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

INFOID:0000000005273465

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.

Any of following two methods may be used.

Procedure After Replacing ECM

INFOID:0000000005273466

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, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

2.

Perform 

EC-473, "VIN Registration"

.

3.

Perform 

EC-473, "Accelerator Pedal Released Position Learning"

.

4.

Perform 

EC-473, "Throttle Valve Closed Position Learning"

.

5.

Perform 

EC-473, "Idle Air Volume Learning"

.

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INSPECTION AND ADJUSTMENT

EC-473

< BASIC INSPECTION >

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VIN Registration

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DESCRIPTION

VIN Registration is an operation to register 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-27, "Model Variation"

.

2.

Turn ignition switch ON with engine stopped.

3.

Select “VIN REGISTRATION” in “WORK SUPPORT” mode.

4.

Follow the instruction on the CONSULT-III display.

Accelerator Pedal Released Position Learning

INFOID:0000000005273468

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.

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:0000000005273469

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 the harness connector of
electric throttle control actuator or ECM is disconnected.

OPERATION PROCEDURE

1.

Check that accelerator pedal is fully released.

2.

Turn ignition switch ON.

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:0000000005273470

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)

EC-474

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

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
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SE” in “DATA MONITOR” mode of “A/T” system indicates

less than 0.9 V.

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

OPERATION PROCEDURE

 With CONSULT-III

1.

Perform 

EC-473, "Accelerator Pedal Released Position Learning"

.

2.

Perform 

EC-473, "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.

Check that “CMPLT” is displayed on CONSULT-III 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 check that idle speed and ignition timing are within the specifi-
cations.

 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-473, "Accelerator Pedal Released Position Learning"

.

2.

Perform 

EC-473, "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, then 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  it 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: 625 

±

 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)