NISSAN LATIO 2010 Service Repair Manual

EC-416
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COOLING FAN
Wiring Diagram
INFOID:0000000005398598
BBWA2997E
Revision: January 20102010 Versa

COOLING FANEC-417
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Diagnosis ProcedureINFOID:0000000005398599
1.CHECK IPDM E/R POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E44.
BBWA3001E
Revision: January 20102010 Versa

EC-418
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COOLING FAN
3. Check the voltage between IPDM E/R harness connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
• 50 A fusible link (letter J)
• Harness for open or short between IPDM E/R and battery
>> Repair open circuit or short to ground in harness or connectors.
3.CHECK IPDM E/R GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors E46 and E48.
3. Check the continuity between IPDM E/R harness connector and ground.
4. Also check harness for short to power.
OK or NG
OK (Models with A/C)>>GO TO 4.
OK (Models without A/C)>>GO TO 6.
NG >> Repair open circuit or short to power in harness or connectors.
4.CHECK COOLING FAN MOTOR CIRCUIT
1. Disconnect cooling fan motor harness connector.
2. Check the continuity between IPDM E/R harness connector and cooling fan motor harness connector.
3. Check the continuity between cooling fan motor harness connector and ground.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
IPDM E/R Ground Voltage
Connector Terminal
E44 22 Ground Battery voltage
PBIB2067E
IPDM E/R Ground Continuity
Connector Terminal
E46 39 Ground Existed
E48 59
IPDM E/R Cooling fan motor
Continuity
Connector Terminal Connector Terminal
E44 20
E3 1 Existed
24
Cooling fan motor Ground Continuity
Connector Terminal
E3 2 Ground Existed
Revision: January 20102010 Versa

COOLING FANEC-419
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• Harness for open or short between cooling fan motor and IPDM E/R
• Harness for open or short between cooling fan motor and ground
•Resistor E5
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN MOTOR CIRCUIT
1. Disconnect cooling fan motor harness connector.
2. Check the continuity between IPDM E/R harne ss connector and cooling fan motor harness connector.
3. Check the continuity between cooling fan motor harness connector and ground.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between cooling fan motor and IPDM E/R
• Harness for open or short between cooling fan motor and ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK COOLING FAN MOTOR
Refer to EC-419, "
Component Inspection".
OK or NG
OK >> GO TO 9.
NG >> Replace cooling fan motor.
9.CHECK INTERMITTENT INCIDENT
Perform EC-114, "
Diagnosis Procedure".
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness or connector.
Component InspectionINFOID:0000000005398600
COOLING FAN MOTOR
Model with A/C
IPDM E/R Cooling fan motor
Continuity
Connector Terminal Connector Terminal
E44 20
E3 1
Existed
23 3
24 2
Cooling fan motor Ground Continuity
Connector Terminal
E3 4 Ground Existed
Revision: January 20102010 Versa

EC-420
< COMPONENT DIAGNOSIS >[HR16DE]
COOLING FAN
1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and
check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.
Models without A/C
1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.
Te r m i n a l s
(+) (-)
Cooling fan motor 12
SEF888V
Speed terminals
(+) (− )
Cooling fan motor Low 14
23
High 1 and 2 3 and 4
SEF734W
Revision: January 20102010 Versa

ELECTRICAL LOAD SIGNALEC-421
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ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000005398601
The electrical load signal (Headlamp switch signal, rear
window defogger switch signal, etc.) is transferred via
the CAN communication line.
Component Function CheckINFOID:0000000005398602
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-421, "
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-421, "
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-421, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005398603
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-421, "
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: January 20102010 Versa

EC-422
< COMPONENT DIAGNOSIS >[HR16DE]
ELECTRICAL LOAD SIGNAL
>> INSPECTION END
3.CHECK HEADLAMP SYSTEM
Refer to LT-13, "
How to Perform Trouble Diagnosis" (For USA) or LT-36, "How to Perform Trouble Diagnosis"
(For Canada).
>> INSPECTION END
4.CHECK HEATER FAN CONTROL SYSTEM
Refer to MTC-23, "
How to Perform Trouble Diagnosis for Quick and Accurate Repair".
>> INSPECTION END
Revision: January 20102010 Versa

FUEL INJECTOREC-423
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FUEL INJECTOR
DescriptionINFOID:0000000005398604
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:0000000005398605
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES >> GO TO 2.
NO >> Go to EC-424, "
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-424, "
Diagnosis Procedure".
PBIA9664J
Clicking noise should be heard.
PBIB3332E
Revision: January 20102010 Versa

EC-424
< COMPONENT DIAGNOSIS >[HR16DE]
FUEL INJECTOR
Wiring Diagram
INFOID:0000000005398606
Diagnosis ProcedureINFOID:0000000005398607
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: January 20102010 Versa

FUEL INJECTOREC-425
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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-425, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning fuel injector.
5.CHECK INTERMITTENT INCIDENT
Refer to EC-114, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
Component InspectionINFOID:0000000005398608
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: January 20102010 Versa