Nissan Altima L32. Instruction — part 483
INSPECTION AND ADJUSTMENT
EC-1053
< BASIC INSPECTION >
[VQ35DE]
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2.
PERFORM VIN REGISTRATION
With CONSULT-III
1. Turn ignition switch ON and engine stopped.
2. Select “VIN REGISTRATION” in “WORK SUPPORT” mode.
3. Follow the instruction of CONSULT-III display.
>> END
ACCELERATOR PEDAL RELEASED POSITION LEARNING
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Description
INFOID:0000000004361951
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.
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Re-
quirement
INFOID:0000000004361952
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
THROTTLE VALVE CLOSED POSITION LEARNING
THROTTLE VALVE CLOSED POSITION LEARNING : Description
INFOID:0000000004361953
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.
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement
INFOID:0000000004361954
1.
START
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.
>> END
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING : Description
INFOID:0000000004361955
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.
IDLE AIR VOLUME LEARNING : Special Repair Requirement
INFOID:0000000004361956
1.
PRECONDITIONING
Check that all of the following conditions are satisfied.
EC-1054
< BASIC INSPECTION >
[VQ35DE]
INSPECTION AND ADJUSTMENT
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
- CVT models
• With CONSULT-III: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “CVT” system indi-
cates less than 0.9 V.
• Without CONSULT-III: Drive vehicle for 10 minutes.
- M/T models
• Drive vehicle for 10 minutes.
Will CONSULT-III be used?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
PERFORM IDLE AIR VOLUME LEARNING
With CONSULT-III
1. Perform
EC-1053, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair
.
2. Perform
EC-1053, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
.
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-III screen?
YES
>> GO TO 4.
NO
>> GO TO 5.
3.
PERFORM IDLE AIR VOLUME LEARNING
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-1053, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair
.
2. Perform
EC-1053, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
.
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.
9. Start engine and let it idle.
INSPECTION AND ADJUSTMENT
EC-1055
< BASIC INSPECTION >
[VQ35DE]
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10. Wait 20 seconds.
>> GO TO 4.
4.
CHECK IDLE SPEED AND IGNITION TIMING
Rev up the engine two or 3 times and check that idle speed and ignition timing are within the specifications.
EC-1052, "IDLE SPEED : Special Repair Requirement"
ING : Special Repair Requirement"
.
For specifications, refer to
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART-I
Check the following
• Check that throttle valve is fully closed.
• Check PCV valve operation.
• Check that downstream of throttle valve is free from air leakage.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace malfunctioning part.
6.
DETECT MALFUNCTIONING PART-II
Engine component parts and their installation condition are questionable. Check and eliminate the cause of
the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to
.
If any of the following conditions occur after the engine has started, eliminate the cause of the incident and
perform Idle Air Volume Learning again:
• Engine stalls.
• Incorrect idle.
>> INSPECTION END
MIXTURE RATIO SELF-LEARNING VALUE CLEAR
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Description
INFOID:0000000004361959
This describes show to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Special Repair Requirement
INFOID:0000000004361960
1.
START
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-III.
3. Clear mixture ratio self-learning value by touching “CLEAR”.
With GST
SEC897C
EC-1056
< BASIC INSPECTION >
[VQ35DE]
INSPECTION AND ADJUSTMENT
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor harness connector.
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness connector.
6. Select Service $03 with GST. Check that DTC P0102 is detected.
7. Select Service $04 with GST to erase the DTC P0102.
>> END
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