2011 NISSAN LATIO ignition

ELECTRICAL LOAD SIGNALEC-431
< COMPONENT DIAGNOSIS > [HR16DE]
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ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000005930116
The electrical load signal (Headlamp switch signal, rear
window defogger switch signal, etc.) is transferred via
the CAN communication line.
Component Function CheckINFOID:0000000005930117
1.CHECK REAR WINDOW DEF OGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-431, "
Diagnosis Procedure".
2.CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Go to EC-431, "
Diagnosis Procedure".
3.CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-431, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005930118
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-431, "
Compo-
nent Function Check".
Which circuit is related to the incident?
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to GW-55, "
Work Flow".
Monitor item ConditionIndication
LOAD SIGNAL Rear window defogger switch ON ON
OFF OFF
Monitor item
ConditionIndication
LOAD SIGNAL Lighting switch ON at 2nd position ON
OFF
OFF
Monitor item ConditionIndication
HEATER FAN SW Heater fan control switch ON ON
OFF OFF
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

EC-434
< COMPONENT DIAGNOSIS >[HR16DE]
FUEL INJECTOR
Wiring Diagram
INFOID:0000000005930121
Diagnosis ProcedureINFOID:0000000005930122
1.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
BBWA3003E
Revision: May 2010 2011 Versa

FUEL INJECTOREC-435
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4. Check the voltage between fuel injector harness connector and
ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
• IPDM E/R harness connector E45
• 10 A fuse (No. 55)
• Harness for open or short between fuel injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel injector harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL INJECTOR
Refer to EC-435, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning fuel injector. Refer to EM-33, "
Exploded View".
5.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R".
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
Component InspectionINFOID:0000000005930123
1.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
Fuel injector Ground Voltage
Cylinder Connector Terminal
1F17 1
Ground Battery voltage
2F
18 1
3F 19 1
4F 20 1
JMBIA1636ZZ
Fuel injector ECM
Continuity
Cylinder Connector Terminal Connector Terminal
1F17 2
F1031
Existed
2F18 2
30
3F19 2 29
4F20 2 25
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-438
< COMPONENT DIAGNOSIS >[HR16DE]
FUEL PUMP
Wiring Diagram
INFOID:0000000005930126
Diagnosis ProcedureINFOID:0000000005930127
1.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
AABWA0317GB
Revision: May 2010 2011 Versa

FUEL PUMPEC-439
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4. Check the voltage between ECM harness connector and
ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IDPDM E/R harness connector E46.
3. Turn ignition switch ON.
4. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 10.
3.DETECT MALFUNCTIONING PART
Check the following.
• Harness or connectors E8, F8.
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect “fuel level sensor unit and fuel pump” harness connector.
4. Turn ignition switch ON.
5. Check the voltage between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 5.
5.CHECK FUSE
1. Turn ignition switch OFF.
2. Disconnect 15 A fuse (No. 48) from IPDM E/R.
3. Check 15 A fuse.
Is the inspection result normal?
YES >> GO TO 6.
ECM GroundVoltage
Connector Terminal
F10 23 Ground Battery voltage
PBIA9573J
IPDM E/R
GroundVoltage
Connector Terminal
E46 47 Ground Battery voltage
PBIB3319E
Fuel level sensor unit
and fuel pump Ground Voltage
Connector Terminal
B100 1 Ground Battery voltage should exist 1 second
after ignition switch is turn ON.
PBIB0795E
Revision: May 2010
2011 Versa

EC-440
< COMPONENT DIAGNOSIS >[HR16DE]
FUEL PUMP
NO >> Replace15 A fuse.
6.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E45.
2. Check the continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel pump”
harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E7, M69
• Harness connectors M12, B101
• Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to power in harness or connectors.
8.CHECK FUEL PUMP GROUND CIRCUIT
1. Check the continuity between “fuel le vel sensor unit and fuel pump” and ground.
2. Also heck harness for short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit or short to power in harness or connectors.
9.CHECK FUEL PUMP
Refer to EC-440, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace “fuel level sensor unit, fuel filter and fuel pump”. Refer to FL-6, "
Removal and Installa-
tion".
10.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R".
NO >> Repair or replace harness or connectors.
Component InspectionINFOID:0000000005930128
1.CHECK FUEL PUMP
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor uni t and fuel pump” harness connector.
IPDM E/RFuel level sensor unit and
fuel pump Continuity
Connector Terminal Connector Terminal
E45 36 B100 1 Existed
Fuel level sensor unit and fuel pump Ground Continuity
Connector Terminal
B100 3 Ground Existed
Revision: May 2010 2011 Versa