2010 NISSAN TIIDA engine cooling fan

CO-1
ENGINE
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SECTION CO
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CONTENTS
ENGINE COOLING SYSTEM
HR16DE
PRECAUTION ....... ........................................
3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
3
Precaution for Liquid Gasket .....................................4
PREPARATION ............................................6
PREPARATION .............................................. .....6
Special Service Tool ........................................... ......6
Commercial Service Tool ..........................................6
SYMPTOM DIAGNOSIS ...............................8
OVERHEATING CAUSE ANALYSIS ............. .....8
Troubleshooting Chart ...............................................8
FUNCTION DIAGNOSIS .. ............................10
DESCRIPTION ............................................... ....10
Engine Cooling System ....................................... ....10
Engine Cooling System Schematic .........................11
ON-VEHICLE MAINTENANCE ....................12
ENGINE COOLANT ....................................... ....12
Inspection ............................................................ ....12
Changing Engine Coolant .......................................12
RADIATOR .........................................................15
Checking Radiator Cap ....................................... ....15
Checking Radiator ...................................................15
ON-VEHICLE REPAIR .................................17
RADIATOR ..................................................... ....17
Component .......................................................... ....17
Removal and Installation ..................................... ....17
COOLING FAN ..................................................19
Component (Models with A/C) .................................19
Component (Models without A/C) ............................19
Removal and Installation .........................................20
Disassembly and Assembly .....................................20
WATER PUMP ..................................................21
Exploded View .........................................................21
Removal and Installation .........................................21
Inspection ................................................................22
THERMOSTAT ..................................................23
Exploded View .........................................................23
Removal and Installation .........................................23
Inspection ................................................................24
WATER OUTLET ..............................................25
Exploded View .........................................................25
Removal and Installation .........................................25
Inspection ................................................................26
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
27
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
27
Periodical Maintenance Specification .................. ....27
Radiator ...................................................................27
Thermostat ..............................................................27
MR18DE
SERVICE INFORMATION .. .........................
28
PRECAUTIONS .................................................28
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
28
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
28
Precaution for Liquid Gasket ...................................29
Revision: January 20102010 Versa

CO-2
PREPARATION .............................................. ...31
Special Service Tool ............................................ ...31
Commercial Service Tool .......................................31
OVERHEATING CAUSE ANALYSIS ................33
Troubleshooting Chart ......................................... ...33
COOLING SYSTEM ...........................................35
Cooling Circuit ..................................................... ...35
ENGINE COOLANT ...........................................36
Inspection ............................................................ ...36
Changing Engine Coolant .......................................36
RADIATOR ........................................................39
Checking Radiator Cap ....................................... ...39
Checking Radiator ..................................................39
Component .............................................................40
Removal and Installation ........................................41
COOLING FAN ..................................................42
Component (Models with A/C) ................................42
Component (Models without A/C) ........................ ...42
Removal and Installation .........................................43
Disassembly and Assembly ................................. ...43
WATER PUMP ...................................................44
Component .......................................................... ...44
Removal and Installation .........................................44
THERMOSTAT ............................................... ...46
Component .......................................................... ...46
Removal and Installation .........................................46
WATER OUTLET AND WATER CONTROL
VALVE ............................................................ ...
48
Component .......................................................... ...48
Removal and Installation .........................................48
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
51
Standard and Limit ............................................... ...51
Revision: January 20102010 Versa

CO-8
< SYMPTOM DIAGNOSIS >[HR16DE]
OVERHEATING CAUSE ANALYSIS
SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000005398180
Symptom
Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed
—
Damaged fins Dust contamination or pa-
per clogging
Physical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling fan does not oper-
ate
Fan assembly —
High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud —Radiator shroud —
Improper engine coolant
mixture ratio —
Engine coolant viscosity —
Poor engine coolant quality — —
Insufficient engine coolant Engine coolant leaksCooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Reservoir tank cap Loose
Poor sealing
Radiator O-ring for da
mage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into cool-
ing system Cylinder head deterioration
Cylinder head gasket deteri-
oration
Revision: January 20102010 Versa

CO-18
< ON-VEHICLE REPAIR >[HR16DE]
RADIATOR
Do not remove radiator cap when
the engine is hot. Serious burns could occur from high-pressure
engine coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a
turn to release built-up pressure. Ca refully remove radiator cap by turning it all the way.
REMOVAL
1. Remove engine under cover. Refer to EI-15, "Removal and Installation".
2. Drain engine coolant from radiator. Refer to CO-12, "
Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
3. Remove air duct (inlet). Refer to EM-26, "
Exploded View".
4. Remove reservoir tank as follows:
a. Disconnect reservoir tank hose.
b. Release the tab (A) in the direction shown by the arrow ( ).
c. Lift up while removing the reservoir tank hose, and remove it.
5. Disconnect harness connector from fan motor, and move harness aside.
6. Disconnect A/T fluid cooler hoses if equipped. • Install plug to avoid leakage of A/T fluid if equipped.
7. Remove radiator hoses (upper and lower).
8. Remove radiator core support cover.
9. Remove cooling fan assembly.
10. Remove radiator core support (upper) bolts, bolts of stationary part on the radiator core support side and clip. Lift radiator
assembly (1) from radiator (upper) mount part of radiator core
support (upper) (2).
11. Move radiator assembly (1) to the rearward direction of vehicle, and then lift it upward to remove.
CAUTION:
Do not damage or scratch A/ C condenser if equipped and
radiator core when removing.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not damage or scratch A/C condenser if equipped and radiator core when removing.
INSPECTION AFTER INSTALLATION
• Check for leaks of engine coolant. Refer to CO-12, "Inspection".
• Start and warm up engine. Visually check if there is no leaks of engine coolant and A/T fluid if equipped. Refer to CO-12, "
Inspection" and AT-17, "Checking A/T Fluid".
PBIC3800E
PBIC3805E
Revision: January 20102010 Versa

CO-20
< ON-VEHICLE REPAIR >[HR16DE]
COOLING FAN
Removal and Installation
INFOID:0000000005398191
REMOVAL
1. Partially drain engine coolant from radiator. Refer to CO-12, "Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
2. Remove air duct (inlet). Refer to EM-26, "
Exploded View".
3. Remove reservoir tank.
4. Disconnect radiator hose (upper) at radiator side. Refer to CO-17, "
Component".
5. Disconnect harness connectors from fan motor, and move harness to aside.
6. Remove cooling fan assembly. CAUTION:
Be careful not to damage or scratch the radiator core.
INSTALLATION
Installation is in the reverse order of removal.
• Cooling fans are controlled by ECM. For details, refer to EC-415, "
Description".
CAUTION:
Be careful not to damage or scratch the radiator core.
Disassembly and AssemblyINFOID:0000000005714051
DISASSEMBLY
1. Remove cooling fan from fan motor.
2. Remove fan motor from fan shroud.
INSPECTION AFTER DISASSEMBLY
Inspect cooling fan for crack or unusual bend.
• If anything is found, replace cooling fan.
ASSEMBLY
Assembly is in the reverse order of disassembly.
Revision: January 20102010 Versa

OVERHEATING CAUSE ANALYSISCO-33
< SERVICE INFORMATION > [MR18DE]
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OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000005398210
Symptom
Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed Thermostat
Damaged fins
Dust contamination or pa-
per clogging
Physical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling fan does not oper-
ate
Fan assembly —
High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — —
Improper engine coolant
mixture ratio —
Engine coolant viscosity —
Poor engine coolant quality — —
Insufficient engine coolant Engine coolant leaks Cooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into cool-
ing systemCylinder head deterioration
Cylinder head gasket deteri-
oration
Revision: January 20102010 Versa

RADIATORCO-41
< SERVICE INFORMATION > [MR18DE]
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Removal and InstallationINFOID:0000000005398215
WARNING:
Do not remove radiator cap when the engine is
hot. Serious burns could occur from high-pressure
engine coolant escaping from radiator. Wrap a thick cl oth around the cap. Slowly turn it a quarter of a
turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
REMOVAL
1. Remove engine under cover. Refer to EI-15, "Removal and Installation".
2. Drain engine coolant from radiator. Refer to CO-36, "
Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
3. Remove air duct (inlet). Refer to EM-135
.
4. Remove reservoir tank as follows:
a. Disconnect reservoir tank hose.
b. Release the tab (A) in the direction shown by the arrow ( ).
c. Lift up while removing the reservoir tank hose, and remove it.
5. Disconnect harness connector from fan motor, and move harness aside.
6. Disconnect CVT or A/T fluid cooler hoses if equipped. • Install plug to avoid leakage of CVT or A/T fluid if equipped.
7. Remove radiator hoses (upper and lower).
8. Remove radiator core support cover. Refer to BL-19
.
9. Remove cooling fan assembly.
10. Remove radiator core support (upper) bolts, bolts of stationary part on the radiator core support side and clip. Lift radiator from
radiator (upper) mount part of radiator core support (upper) (2).
11. Move radiator assembly (1) to the rearward direction of vehicle, and then lift it upward to remove.
CAUTION:
Do not damage or scratch A/C condenser if equipped and
radiator core when removing.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not damage or scratch A/C condenser if eq uipped and radiator core when installing.
INSPECTION AFTER INSTALLATION
• Check for leaks of engine coolant. Refer to CO-36, "Inspection".
• Start and warm up engine. Visually check for leaks of engine coolant and CVT or A/T fluid if equipped. Refer
to CVT-14
or AT- 1 7.
PBIC3800E
PBIC3805E
Revision: January 20102010 Versa

COOLING FANCO-43
< SERVICE INFORMATION > [MR18DE]
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Removal and InstallationINFOID:0000000005398220
REMOVAL
1. Partially drain engine coolant from radiator. Refer to
CO-36, "Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
2. Remove air duct (inlet). Refer to EM-135, "
Component".
3. Remove reservoir tank. Refer to CO-40, "
Component".
4. Disconnect radiator hose (upper) at radiator side. Refer to CO-40, "
Component".
5. Disconnect harness connectors from fan motor, and move harness aside.
6. Remove cooling fan assembly. CAUTION:
Be careful not to damage or scratch the radiator core.
INSTALLATION
Installation is in the reverse order of removal.
• Cooling fans are controlled by ECM. For details, refer to EC-910, "
System Description".
CAUTION:
Be careful not to damage or scratch the radiator core.
Disassembly and AssemblyINFOID:0000000005398221
DISASSEMBLY
1. Remove cooling fan from fan motor.
2. Remove fan motor from fan shroud.
INSPECTION AFTER DISASSEMBLY
Inspect cooling fan for crack or unusual bend.
• If anything is found, replace cooling fan.
ASSEMBLY
Assembly is in the reverse order of disassembly.
Revision: January 20102010 Versa