Nissan Quest E52. Manual - part 481

EC-134

< BASIC INSPECTION >

[VQ35DE]

ADDITIONAL SERVICE WHEN REPLACING ECM

• 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. Refer to 

EC-460, "Removal and Installation"

.

>> GO TO 6.

6.

PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNI-

TION KEY IDS

Refer to 

SEC-58, "ECM : Work Procedure"

.

>> 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?

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-140, "Work Procedure"

.

>> GO TO 10.

10.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform Accelerator Pedal Released Position Learning. Refer to 

EC-135, "Work Procedure"

.

>> GO TO 11.

11.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform Throttle Valve Closed Position Learning. Refer to 

EC-136, "Work Procedure"

.

>> GO TO 12.

12.

PERFORM IDLE AIR VOLUME LEARNING

Perform Idle Air Volume Learning. Refer to 

EC-137, "Work Procedure"

.

>> END

ACCELERATOR PEDAL RELEASED POSITION LEARNING

EC-135

< BASIC INSPECTION >

[VQ35DE]

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ACCELERATOR PEDAL RELEASED POSITION LEARNING

Description

INFOID:0000000009650995

Accelerator Pedal Released Position Learning is a function of ECM to learn the fully released position of the
accelerator 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.

Work Procedure

INFOID:0000000009650996

1.

START

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.

>> END

EC-136

< BASIC INSPECTION >

[VQ35DE]

THROTTLE VALVE CLOSED POSITION LEARNING

THROTTLE VALVE CLOSED POSITION LEARNING

Description

INFOID:0000000009650997

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 electric throttle control actuator or ECM is disconnected or electric throttle control actuator is
cleaned.

Work Procedure

INFOID:0000000009650998

1.

START

 WITH CONSULT

1.

Turn ignition switch ON.

2.

Select “CLSD THL POS LEARN” in “WORK SUPPORT” mode.

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:
Coolant temperature is less than 25

°

C (77

°

F) before engine starts.

2.

Warm up the engine.
NOTE:
Warm up the engine until “COOLAN TEMP/S” on “DATA MONITOR” of CONSULT reaches more than
65

°

C (149

°

F).

3.

Turn ignition switch OFF and wait at least 10 seconds.
NOTE:
Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

>> END

IDLE AIR VOLUME LEARNING

EC-137

< BASIC INSPECTION >

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IDLE AIR VOLUME LEARNING

Description

INFOID:0000000009650999

Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within
the specific range. It must be performed under the following conditions:
• Each time the electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of the specification.

Work Procedure

INFOID:0000000009651000

1.

PRECONDITIONING

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)

• Selector lever position: P or N
• Electric load switch: OFF

(Air conditioner, head lamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the head lamp will not illuminate.

• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “CVT” system indicates

less than 0.9 V.

- Without CONSULT: Drive vehicle for 10 minutes.

Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM IDLE AIR VOLUME LEARNING

With CONSULT

1.

Perform 

EC-135, "Work Procedure"

.

2.

Perform 

EC-136, "Work Procedure"

.

3.

Start engine and warm it up to normal operating temperature.

4.

Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

5.

Touch “START” and wait 20 seconds.

Is “CMPLT” displayed on CONSULT screen?

YES

>> GO TO 4.

NO

>> GO TO 5.

3.

PERFORM IDLE AIR VOLUME LEARNING

Without CONSULT

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-135, "Work Procedure"

.

2.

Perform 

EC-136, "Work Procedure"

.

3.

Start engine and warm it up to normal operating temperature.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

6.

Repeat the following procedure quickly 5 times within 5 seconds.

-

Fully depress the accelerator pedal.

-

Fully release the accelerator pedal.

7.

Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MIL stops blinking
and turns ON.

8.

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