NISSAN LATIO 2009 Service Repair Manual

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P/N POSI SW • Ignition switch: ON
Shift lever: P or N (A/T, CVT),
Neutral (M/T) ON
Shift lever: Except above OFF
PW/ST SIGNAL • Engine: After warming up, idle the
engine Steering wheel: Not being turned OFF
Steering wheel: Being turned ON
LOAD SIGNAL • Ignition switch: ON Rear window defogger switch: ON
and/or Lighting switch: 2nd ON
Rear window defogger switch and light-
ing switch: OFF OFF
IGNITION SW • Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW • Ignition switch: ON Heater fan: Operating ON
Heater fan: Not operating OFF
BRAKE SW • Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1 • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle 8
° - 18 ° BTDC
2,000 rpm 25 ° - 45 ° BTDC
CAL/LD VALUE • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• No load Idle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle 1.0 - 4.0 g·m/s
2,500 rpm 2.0 - 10.0 g·m/s
PURG VOL C/V • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle
(Accelerator pedal is not depressed
even slightly, after engine starting) 0%
2,000 rpm 0 - 50%
INT/V TIM (B1) • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle
−5 ° - 5 °CA
When revving engine up to 2,000 rpm
quickly Approx. 0
° - 40 °CA
INT/V SOL (B1) • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• No load Idle 0% - 2%
When revving engine up to 2,000 rpm
quickly Approx. 0% - 90%
AIR COND RLY • Engine: After warming up, idle the
engine Air conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates) ON
FUEL PUMP RLY • For 1 second after turning ignition switch ON
• Engine running or cranking ON
• Except above conditions OFF
MONITOR ITEM CONDITION SPECIFICATION

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*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they
differ from
ECM terminals voltage signal. SET LAMP
• MAIN switch: ON
• Vehicle speed: Between 40 km/h
(25 MPH) and 144 km/h (89
MPH) ACSD: Operating ON
ASCD: Not operating OFF
MONITOR ITEM CONDITION SPECIFICATION

Basic Inspection " .
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode
with CONSULT-III.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-618, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004537066
OVERALL SEQUENCE

TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-619
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
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EC-620< SERVICE INFOMATION >
[MR TYPE 1]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DETAILED PROCEDURE 1.
CHECK “A/F ALPHA-B1”
1. Start engine.
2. Confirm that the testing conditions are met. Refer to EC-618, " Testing Condition " .
3. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITO R” mode, and make sure that the indication is within
the SP value.
NOTE: PBIB3213E

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Check “A/F ALPHA-B1” for approximately 1 minute because t
hey may fluctuate. It is NG if the indication is
out of the SP value even a little.
OK or NG OK >> GO TO 17.
NG (Less than the SP value)>>GO TO 2.
NG (More than the SP value)>>GO TO 3. OK >> GO TO 4.
NG (More than the SP value)>>GO TO 19. OK >> GO TO 6.
NG (More than the SP value)>>GO TO 6.
NG (Less than the SP value)>>GO TO 25. OK >> GO TO 5.
NG >> GO TO 6. Changing Engine Oil " .
NOTE:
This symptom may occur when a large amount of gas oline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detect ed after changing engine oil or changing driving con-
dition.
>>INSPECTION END Fuel Pressure Check " .)
OK or NG OK >> GO TO 9.
NG (Fuel pressure is too high)>>Replace fuel pressure regulator, refer to EC-574, " Fuel Pressure Check " .
GO TO 8.
NG (Fuel pressure is too low)>>GO TO 7. .)
2. If NG, repair or replace the malfunctioning part. (Refer to EC-574, " Fuel Pressure Check " .)
If OK, replace fuel pressure regulator.

OK >>
INSPECTION END
NG >> GO TO 9. OK >> GO TO 12.
NG >> GO TO 10. .)
- Fuel injector and its circuit (Refer to EC-986 .)
- Intake air leakage
- Low compression pressure (Refer to EM-185, " On-Vehicle Service " .)
2. If NG, repair or replace the malfunctioning part.
If OK, replace fuel injector. (It may be caus ed by leakage from fuel injector or clogging.)
>> GO TO 11. OK >>
INSPECTION END
NG >> GO TO 12. DTC Confirmation Procedure " .
• For DTC P0131, refer to EC-698, " DTC Confirmation Procedure " .
• For DTC P0132, refer to EC-704, " DTC Confirmation Procedure " .
• For DTC P0133, refer to EC-710, " DTC Confirmation Procedure " .
• For DTC P2A00, refer to EC-966, " DTC Confirmation Procedure " .
OK or NG OK >> GO TO 15.
NG >> GO TO 13.

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OK >>
INSPECTION END
NG >> GO TO 15. OK >>
INSPECTION END
NG >> Detect malfunctioning part according to EC-583, " Symptom Matrix Chart " .
OK >>
INSPECTION END
NG (More than the SP value)>>GO TO 18.
NG (Less than the SP value)>>GO TO 25. OK >> GO TO 21.
NG >> Repair or replace malfunctioning part, and then GO TO 20. OK >>
INSPECTION END
NG (“B/FUEL SCHDL” is more, “A/F ALPHA- B1” is less than the SP value)>>GO TO 21.

OK >> 1. Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to
EC-655 .
2. GO TO 29.
NG >> GO TO 23. OK >> GO TO 24.
NG (More than the SP value)>>Replace mass air flow sensor, and then GO TO 29. ECM Re-communicating Function " .
3. Perform EC-572, " VIN Registration " .
4. Perform EC-572, " Accelerator Pedal Released Position Learning " .
5. Perform EC-572, " Throttle Valve Closed Position Learning " .
6. Perform EC-572, " Idle Air Volume Learning " .
>> GO TO 29. OK >> GO TO 27.
NG >> Repair or replace malfunctioning part, and then GO TO 26. OK >>
INSPECTION END
NG (Less than the SP value)>>GO TO 27. OK >> GO TO 28.
NG (Less than the SP value)>>Replace mass air flow sensor, and then GO TO 30.