Nissan Versa Sedan. Manual — part 281
ADDITIONAL SERVICE WHEN REPLACING ECM
EC-123
< BASIC INSPECTION >
[HR16DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
>> GO TO 7.
7.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
>> GO TO 8.
8.
PERFORM IDLE AIR VOLUME LEARNING
>> END
EC-124
< BASIC INSPECTION >
[HR16DE]
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 >
[HR16DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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 >
[HR16DE]
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
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to
.
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
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to
.
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
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