NISSAN LATIO 2009 Service Repair Manual

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Diagnostic Work Sheet
INFOID:0000000004779988
DESCRIPTION There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about an incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one on the WORKSHEET
SAMPLE in order to organize all the information for troubleshooting.
Some conditions may cause the MI L to come on steady or blink and
DTC to be detected. Examples:
• Vehicle ran out of fuel, which caused the engine to misfire.
• Fuel filler cap was left off or incorrectly screwed on, allowing fuel to evaporate into the atmosphere.
WORKSHEET SAMPLE

YES >> GO TO 2.
NO >> GO TO 3. SEF976U

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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 EC-30, " IDLE SPEED : Special Repair
Requirement " . For specification, refer to
EC-504, " Idle Speed " .
Is the inspection result normal? YES >> GO TO 10.
NO >> GO TO 4. ACCELERATOR PEDAL RELEASED
POSITION LEARNING : Special Repair Require-ment " .
>> GO TO 5. THROTTLE VALVE CLOSED
POSITION LEARNING : Special Repair Requirement " .
>> GO TO 6. IDLE AIR VOLUME LEARNING : Special Repair Requirement " .
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. IDLE SPEED : Special Repair Requirement " .
For specification, refer to EC-504, " Idle Speed " .
Is the inspection result normal? YES >> GO TO 10.
NO >> GO TO 8. DTC Logic " .
• Check crankshaft position sensor (POS) and circuit. Refer to EC-263, " DTC Logic " .
Is the inspection result normal? YES >> GO TO 9.
NO >> Repair or replace. Then GO TO 4. ECM Re-communicating Function " .
>> GO TO 4.

IGNITION TIMING : Special
Repair Requirement " . For specification, refer to
EC-504, " Igni-
tion Timing " .
Is the inspection result normal? YES >> GO TO 19.
NO >> GO TO 11. ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Special Repair Require-ment " .
>> GO TO 12. THROTTLE VALVE CLOSED POSITION LE
ARNING : Special Repair Requirement " .
>> GO TO 13. IDLE AIR VOLUME LEARNING : Special Repair Requirement " .
Is Idle Air Volume Learning carried out successfully? YES >> GO TO 14.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4. IDLE SPEED : Special Repair Requirement " .
For specification, refer to EC-504, " Idle Speed " .
Is the inspection result normal? YES >> GO TO 15.
NO >> GO TO 17. IGNITION TIMING : Special
Repair Requirement " . For specification, refer to
EC-504, " Igni-
tion Timing " .
Is the inspection result normal? YES >> GO TO 19.
NO >> GO TO 16. Removal and Installation " .
Is the inspection result normal? YES >> GO TO 17.
NO >> Repair the timing chain installation. Then GO TO 4. 1 : Timing indicator

EC
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• Check crankshaft position sensor (POS) and circuit. Refer to EC-263, " DTC Logic " .
Is the inspection result normal? YES >> GO TO 18.
NO >> Repair or replace. Then GO TO 4. ADDITIONAL SERVICE WHEN REPLACING CO
NTROL UNIT : Special Repair Requirement " .
>> GO TO 4. ADDITIONAL SERVICE
WHEN REPLACING CONTROL UNIT : Special Repair Requirement " .
>> INSPECTION END
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000004779990
When replacing ECM, this procedure must be performed.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement INFOID:0000000004779991ECM Re-communicating Function " .
>> GO TO 2. VIN REGISTRATION : Special Repair Requirement " .
>> GO TO 3. ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Special Repair Requirement " .
>> GO TO 4. THROTTLE VALVE CLOSED POSITION L
EARNING : Special Repair Requirement " .
>> GO TO 5. IDLE AIR VOLUME LEARNING : Special Repair Requirement " .
>> END

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VIN REGISTRATION : Special Repair Requirement
INFOID:0000000004779997Model Variation " .
>> GO TO 2.

YES >> GO TO 2.
NO >> GO TO 3. ACCELERATOR PEDAL
RELEASED POSITION LEARNING : Special Repair Requirement " .
2. Perform Throttle Valve Closed Position Learning. Refer to EC-31, " THROTTLE VALVE CLOSED POSI-
TION 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. ACCELERATOR PEDAL
RELEASED POSITION LEARNING : Special Repair Requirement " .
2. Perform Throttle Valve Closed Position Learning. Refer to EC-31, " THROTTLE VALVE CLOSED POSI-
TION 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 releas ed, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly five times within 5 seconds.
- Fully depress the accelerator pedal.
- 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.

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9. Start engine and let it idle.
10. Wait 20 seconds.
>> GO TO 4. YES >> INSPECTION END
YES >> GO TO 6.
NO >> Repair or replace malfunctioning part. Description " .
If any of the following conditions occur after the engi ne has started, eliminate the cause of the incident and
perform Idle Air Volume Learning again:
• Engine stalls.
• Erroneous idle.
>> INSPECTION END
MIXTURE RATIO SELF-LEARNING VALUE CLEAR
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Description INFOID:0000000004780004
This describes how to erase the mixture ratio self-lear ning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Special Repair Requirement
INFOID:0000000004780005