Nissan Versa Sedan. Instruction — part 282
IDLE AIR VOLUME LEARNING
EC-127
< BASIC INSPECTION >
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5. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly five times within 5 seconds.
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Fully depress the accelerator pedal.
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Fully release the accelerator pedal.
7. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
8. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
9. Start engine and let it idle.
10. Wait 20 seconds.
>> GO TO 4.
4.
CHECK IDLE SPEED AND IGNITION TIMING
Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifi-
cations.
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
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
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 all over again:
• Engine stalls.
• Erroneous idle.
>> INSPECTION END
PBIB0665E
EC-128
< BASIC INSPECTION >
[HR16DE]
MIXTURE RATIO SELF-LEARNING VALUE CLEAR
MIXTURE RATIO SELF-LEARNING VALUE CLEAR
Description
INFOID:0000000009267039
This describes how to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.
Work Procedure
INFOID:0000000009267040
1.
START
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT.
3. Clear mixture ratio self-learning value by touching “CLEAR”.
With GST
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. Make sure DTC P0102 is detected.
7. Select Service $04 with GST to erase the DTC P0102.
>> END
BASIC INSPECTION
EC-129
< BASIC INSPECTION >
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BASIC INSPECTION
Work Procedure
INFOID:0000000009267041
1.
INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
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Harness connectors for improper connections
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Wiring harness for improper connections, pinches and cut
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Vacuum hoses for splits, kinks and improper connections
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Hoses and ducts for leaks
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Air cleaner clogging
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Gasket
3. Confirm that electrical or mechanical loads are not applied.
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Headlamp switch is OFF.
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Air conditioner switch is OFF.
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Rear window defogger switch is OFF.
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Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points to the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no
load.
6. Make sure that no DTC is displayed with CONSULT or GST.
Is any DTC detected?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3
3.
CHECK TARGET IDLE SPEED
1. Run engine at about 2,000 rpm for about 2 minutes under no load.
SEF983U
SEF976U
SEF977U
EC-130
< BASIC INSPECTION >
[HR16DE]
BASIC INSPECTION
2. Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.
3. Check idle speed.
For procedure, refer to
.
For specification, refer to
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 4.
4.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform
.
>> GO TO 5.
5.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
>> GO TO 6.
6.
PERFORM IDLE AIR VOLUME LEARNING
Perform
Is Idle Air Volume Learning carried out successfully?
YES
>> GO TO 7.
NO
>> Follow the instruction of IDLE AIR VOLUME LEARNING. Then GO TO 4.
7.
CHECK TARGET IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, refer to
.
For specification, refer to
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the Following.
• Check intake camshaft position sensor (PHASE) and circuit. Refer to
• Check crankshaft position sensor (POS) and circuit. Refer to
.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace. Then GO TO 4.
9.
CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization and registration of all NATS ignition key IDs. Refer to
(WITH INTELLIGENT KEY SYSTEM) or
SEC-129, "ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement"
(WITHOUT INTELLIGENT KEY SYSTEM).
>> GO TO 4.
10.
CHECK IGNITION TIMING
1. Run engine at idle.
PBIA8513J
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