2011 NISSAN LATIO engine

COOLING FANEC-425
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COOLING FAN
DescriptionINFOID:0000000005930111
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant
temperature, refrigerant
pressure, and air conditioner ON signal. The contro l system has 3-step control [HIGH/LOW/OFF].
COOLING FAN MOTOR
Models without A/C
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.
Models with A/C
The cooling fan operates at high (HI) speed when the current flows, and operates at low (LOW) speed when
cooling fan motor and the resistor are circuited in series.
Component Function CheckINFOID:0000000005930112
1.CHECK COOLING FAN FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.
3. Touch “LOW” and “Hi” on the CONSULT-III screen.
4. Check that cooling fan operates at each speed.
Without CONSULT-III
1. Perform IPDM E/R auto active test and c heck cooling fan motor operation. Refer to PG-20, "
Auto Active
Te s t".
2. Check that cooling fan operates at each speed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to EC-427, "
Diagnosis Procedure".
Cooling fan Speed Cooling fan motor terminals
(+) (–)
Low (LOW) 1
3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
High (HI) 1 and 23 and 4
Revision: May 2010 2011 Versa

FUEL INJECTOREC-433
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FUEL INJECTOR
DescriptionINFOID:0000000005930119
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Component Function CheckINFOID:0000000005930120
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES >> GO TO 2.
NO >> Go to EC-434, "
Diagnosis Procedure".
2.CHECK FUEL INJECTOR FUNCTION
With CONSULT-III
1. Start engine.
2. Perform “POWER BALANCE” in “A CTIVE TEST” mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Let engine idle.
2. Listen to each fuel injector operating sound.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-434, "
Diagnosis Procedure".
PBIA9664J
Clicking noise should be heard.
PBIB3332E
Revision: May 2010 2011 Versa

FUEL PUMPEC-437
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FUEL PUMP
DescriptionINFOID:0000000005930124
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
start ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to
operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The EC M stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly dr ive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
Component Function CheckINFOID:0000000005930125
1.CHECK FUEL PUMP FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers.
Is the inspection result normal?
YES >> INSPECTION END
NO >> EC-438, "
Diagnosis Procedure".
Sensor Input signal to ECMECM functionActuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
Fuel pump controlFuel pump relay
↓
Fuel pump
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and cranking Operates.
When engine is stopped Stops in 1.5 seconds.
Except as shown above Sto ps .
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
ALBIA0276ZZ
Revision: May 2010 2011 Versa

EC-442
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IGNITION SIGNAL
IGNITION SIGNAL
DescriptionINFOID:0000000005930129
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/O
FF operation induces the proper high voltage in the coil
secondary circuit.
Component Function CheckINFOID:0000000005930130
1.INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO >> Go to EC-444, "
Diagnosis Procedure".
2.IGNITION SIGNAL FUNCTION
With CONSULT-III
1. Perform “POWER BALANCE” in “A CTIVE TEST” mode with CONSULT-III.
2. Make sure that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-444, "
Diagnosis Procedure".
3.IGNITION SIGNAL FUNCTION
Without CONSULT-III
1. Let engine idle.
2. Read the voltage signal between ECM harness connector and
ground.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-444, "
Diagnosis Procedure".
ECM Ground Voltage signal
Connector Terminal
F10 17
Ground
18
21
22
PBIA9567J
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Revision: May 2010
2011 Versa

IGNITION SIGNALEC-447
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3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to EC-447, "
Component Inspection (Ignition Coil with Power Transistor)".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Replace malfunctioning ignition coil with power transistor. Refer to EM-46, "
Exploded View".
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
>> INSPECTION END
Component Inspection (Ignition Coil with Power Transistor)INFOID:0000000005930133
1.CHECK IGNITION COIL WITH POWER TRANSISTOR-I
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as per the fol- lowing.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace malfunctioning ignition coil with power transis- tor. Refer to EM-46, "
Exploded View".
2.CHECK IGNITION COIL WITH POWER TRANSISTOR-II
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Remove fuel pump fuse in IPDM E/R to release fuel pressure. NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
4. Start engine.
5. After engine stalls, crank it two or three times to release all fuel pressure.
6. Turn ignition switch OFF.
7. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
8. Remove ignition coil and spark plug of the cylinder to be checked.
9. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
Ignition coil ECM
Continuity
Cylinder Connector Terminal Connector Terminal
1F34 1
F1417
Existed
2F35 1
18
3F36 1 22
4F37 1 21
Terminals Resistance [Ω at 25° C (77°F)]
1 and 2 Except 0 or ∞
1 and 3 Except 0
2 and 3
PBIB0847E
Revision: May 2010 2011 Versa

EC-448
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IGNITION SIGNAL
10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
12. Crank engine for about three seconds, and check whether spark is generated between the spark plug and the grounded metal
portion.
CAUTION:
• During the operation, alw ays stay 0.5 cm (19.7 in) away
from the spark plug and the ignition coil. Be careful not to
get an electrical shock wh ile checking, because the elec-
trical discharge voltage becomes 20 kV or more.
• It might cause to damage the igni tion coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the sp ark might be generated even if the coil is mal-
functioning.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace malfunctioning ignition coil with power transistor. Refer to EM-46, "
Exploded View".
Component Inspection (Condenser-2)INFOID:0000000005930134
1.CHECK CONDENSER-2
1. Turn ignition switch OFF.
2. Disconnect condenser-2 harness connector.
3. Check resistance between condenser-2 terminals as per the fol- lowing.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace condenser-2. Spark should be generated.
JMBIA0066GB
Terminals
Resistance
1 and 2 Above 1 M Ω [at 25 °C (77 °F)]
PBIB0794E
Revision: May 2010 2011 Versa

MALFUNCTION INDICATOR LAMPEC-449
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MALFUNCTION INDICATOR LAMP
DescriptionINFOID:0000000005930135
The Malfunction Indicator Lamp (MIL) is located on the combination
meter.
The MIL will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
When the engine is started, the MIL should go off. If the MIL remains
on, the on board diagnostic syste
m has detected an engine system
malfunction.
For details, refer to EC-451, "
Diagnosis Procedure".
Component Function CheckINFOID:0000000005930136
1.CHECK MIL FUNCTION
1. Turn ignition switch ON.
2. Make sure that MIL lights up.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-451, "
Diagnosis Procedure".
SEF217U
Revision: May 2010 2011 Versa

ON BOARD REFUELING VAPOR RECOVERY (ORVR)EC-453
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ON BOARD REFUELING VAPOR RECOVERY (ORVR)
DescriptionINFOID:0000000005930139
From the beginning of refueling, the air and vapor insi
de the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The v apor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.
WARNING:
When conducting inspectio ns below, be sure to observe the following:
• Put a “CAUTION: FLAMMABL E” sign in workshop.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.
• Be sure to furnish the workshop with a CO
2 fire extinguisher.
CAUTION:
• Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof containe r and put lid on securely.
- Release fuel pressure from fuel line. Refer to FL-5, "
Checking Fuel Line".
- Disconnect battery ground cable.
• Always replace O-ring when the fu el gauge retainer is removed.
• Do not kink or twist hose and tube when they are installed.
• Do not tighten hose and clamps excessively to avoid damaging hoses.
• After installation, run engine and check for fuel leaks at connection.
• Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.
Component Function CheckINFOID:0000000005930140
1.CHECK ORVR FUNCTION
Check whether the following symptoms are present.
• Fuel odor from EVAP canister is strong.
• Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.
Is any symptom present?
YES >> Go to EC-453, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005930141
1.INSPECTION START
Check whether the following symptoms are present.
A: Fuel odor from EVAP canister is strong.
JMBIA1930GB
Revision: May 2010 2011 Versa