Nissan Versa Sedan. Manual - part 281

ADDITIONAL SERVICE WHEN REPLACING ECM

EC-123

< BASIC INSPECTION >

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C

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EC

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Refer to 

EC-124, "Work Procedure"

.

>> GO TO 7.

7.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-125, "Work Procedure"

.

>> GO TO 8.

8.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-126, "Work Procedure"

.

>> END

EC-124

< BASIC INSPECTION >

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ACCELERATOR PEDAL RELEASED POSITION LEARNING

ACCELERATOR PEDAL RELEASED POSITION LEARNING

Description

INFOID:0000000009267033

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 harness connector of accelerator pedal position sensor or ECM is disconnected.

Work Procedure

INFOID:0000000009267034

1.

START

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.

>> END

THROTTLE VALVE CLOSED POSITION LEARNING

EC-125

< BASIC INSPECTION >

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THROTTLE VALVE CLOSED POSITION LEARNING

Description

INFOID:0000000009267035

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 harness connec-

tor of electric throttle control actuator or ECM is disconnected or electric throttle control actuator inside is

cleaned.

Work Procedure

INFOID:0000000009267036

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:

Engine coolant temperature is 25

°C (77°F) or less before engine starts.

2. Warm up the engine.

NOTE:

Raise engine coolant temperature until it reaches 65

°C (149°F) or more.

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.

>> END

EC-126

< BASIC INSPECTION >

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IDLE AIR VOLUME LEARNING

IDLE AIR VOLUME LEARNING

Description

INFOID:0000000009267037

Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps each engine idle speed

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.

Work Procedure

INFOID:0000000009267038

1.

PRECONDITIONING

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 12.9 V (At idle)

• Engine coolant temperature: 70 - 100

°C (158 - 212°F)

• Selector lever: P or N (A/T or CVT), Neutral (M/T)

• Electric load switch: OFF

(Air conditioner, headlamp, rear window defogger)

- For vehicles equipped with daytime light systems, perform one of the following procedures before

starting engine not to illuminate headlamps.

• Apply parking brake

• Set lighting switch to the 1st position

• Steering wheel: Neutral (Straight-ahead position) position

• Vehicle speed: Stopped

• Transmission: Warmed-up

- A/T or CVT models

• With CONSULT: Drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “TRANSMISSION” sys-

tem indicates less than 0.9 V.

• Without CONSULT: Drive vehicle for 10 minutes.

- M/T models

• Drive vehicle for 10 minutes.
Do you have CONSULT?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

IDLE AIR VOLUME LEARNING

With CONSULT

1. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING. Refer to 

EC-124, "Work Proce-

dure"

.

2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to 

EC-125, "Work Procedure"

.

3. Start engine and warm it up to normal operating temperature.

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

5. Touch “START” and wait 20 seconds.
Is “CMPLT” displayed on CONSULT screen?

YES

>> GO TO 4.

NO

>> GO TO 5.

3.

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 ACCELERATOR PEDAL RELEASED POSITION LEARNING. Refer to 

EC-124, "Work Proce-

dure"

.

2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to 

EC-125, "Work Procedure"

.

3. Start engine and warm it up to normal operating temperature.

4. Turn ignition switch OFF and wait at least 10 seconds.