Post on 24-Aug-2019
SJC8A000000000J1001ZCAT00
Engine Cooling
Cooling System
Fan Controls
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Component Location Index . 10-2Radiator Cap Test . 10-3Radiator Test . 10-3Fan Motor Test . 10-4Thermostat Test . 10-4Water Pump Inspection . 10-5Water Pump Replacement . 10-5Coolant Check . 10-6Coolant Replacement . 10-6Thermostat Replacement . 10-8Water Passage Replacement . 10-9Radiator and Fan Replacement . 10-12
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Component Location Index . 10-15Symptom Troubleshooting Index . 10-16Circuit Diagram . 10-17Radiator Fan High Speed Circuit Troubleshooting . 10-18
07/05/09 16:41:59 61SJC020_100_0001
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SJC8A00A14400000000DAAT00
10-2
Cooling System
Component Location Index
RADIATOR CAP
RADIATOR
WATER PASSAGE
THERMOSTAT
WATER PUMP
RADIATOR FAN ASSEMBLY
Test,page 10-3
Replacement, page 10-12
Replacement, page 10-9
Test, page 10-4Replacement, page 10-8
Inspection, page 10-5Replacement, page 10-5
Replacement, page 10-12Fan Motor Test, page 10-4
07/05/09 16:42:02 61SJC020_100_0002
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SJC8A00A14400049201FEAT01
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SJC8A00A14400049001FEAT02
10-310-3
Radiator Cap Test Radiator Test
B
A
A
1. Remove the radiator cap (A). Wet its seal withengine coolant, then install it on a commerciallyavailable pressure tester (B).
2. Apply a pressure of 93 123 kPa (0.951.25 kgf/cm , 14 18 psi).
3. Check for a drop in pressure.
4. If the pressure drops, replace the cap.
1. Wait until the engine is cool, then carefully removethe radiator cap, and fill the radiator with enginecoolant to the top of the filler neck.
2. Attach a commercially available pressure tester (A)to the radiator, and apply a pressure of 93 123 kPa(0.95 1.25 kgf/cm , 14 18 psi).
3. Inspect for engine coolant leaks and a drop inpressure.
4. Remove the tester, then reinstall the radiator cap.
2
2
07/05/09 16:42:02 61SJC020_100_0003
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SJC8A00A14400049401FEAT01
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SJC8A00A14400059301FEAT02
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Standard Thermostat
Lift Height: Above 10.0 mm (0.39 in.)
Starts Opening: 169 176 °F (76 80 °C)
Fully Open: 194 °F (90 °C)
10-410-4
Cooling System
Fan Motor Test Thermostat Test
A B
B
A
1. Disconnect the 2P connectors from the radiator fanmotor (A) and condenser fan motor (B).
2. Test each motor by connecting battery power to theNo. 1 terminal and ground to the No. 2 terminal.
3. If either motor fails to run or does not run smoothly,replace it (see page 10-12).
Replace the thermostat if it is in the stuck open positionat room temperature.
To test a closed thermostat:
1. Suspend the thermostat (A) in a container of water.Do not let the thermometer (B) touch the bottom ofthe hot container.
2. Heat the water and check the temperature with athermometer. Note the temperature at which thethermostat first opens, and at which it is fully open.
3. Measure the lift height of the thermostat when it isfully open.
Terminal side ofmale terminals
07/05/09 16:42:02 61SJC020_100_0004
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SJC8A00A14400065101MAAT01
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SJC8A00A14400065101KBAT02
10-510-5
Water Pump Inspection Water Pump Replacement
A
A
6 x 1.0 mm12 N·m(1.2 kgf·m, 8.7 lbf·ft)
A
B
1. Remove the timing belt (see page 6-13).
2. Turn the water pump pulley counterclockwise.Check that it turns freely. If it doesn’t turn smoothly,replace the water pump (see page 10-5).
NOTE: When you check the water pump, you maysee a small amount of ‘‘weeping’’ from the bleedholes (A). This is normal.
3. Install the timing belt (see page 6-16).
1. Drain the engine coolant (see page 10-6).
2. Remove the timing belt (see page 6-13).
3. Remove the timing belt adjuster (see page 6-24).
4. Remove the water pump (A) by removing the fivebolts.
5. Inspect and clean the O-ring groove and the matingsurface of the engine block.
6. Install the water pump with a new O-ring (B) in thereverse order of removal.
7. Clean up any spilled engine coolant.
8. Install the timing belt adjuster (see page 6-24).
9. Install the timing belt (see page 6-16).
10. Refill the radiator with engine coolant, then bleedthe air from the cooling system (see step 9 on page10-7).
07/05/09 16:42:03 61SJC020_100_0005
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SJC8A00A14400017301MAAT01
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10-610-6
Cooling System
Coolant Check Coolant Replacement
B
A
A
B9.8 N·m(1.0 kgf·m, 7.2 lbf·ft)
A
1. Look at the coolant level in the coolant reservoir.Make sure it is between the MAX mark (A) and MINmark (B).
2. If the coolant level in the coolant reservoir is at orbelow the MIN mark, add coolant to bring itbetween the MIN and MAX marks, then inspect thecooling system for leaks.
1. Start the engine. Set the heater temperature controldial to maximum heat, then turn off the ignitionswitch. Make sure the engine and radiator are coolto the touch.
2. Remove the radiator cap.
3. Remove the splash shield (see step 30 on page 5-5).
4. Loosen the drain plug (A), and drain the coolant.
5. Install a rubber hose (A) on the drain bolt (B)located at the rear of the engine block, then loosenthe drain bolt.
6. When the coolant stops draining, tighten the drainbolt. Remove the rubber hose.
7. Tighten the radiator drain plug securely.
8. Install the splash shield (see step 31 on page 5-17).
07/05/09 16:42:03 61SJC020_100_0006
03
04
Engine Coolant Capacities (Including the reserve
tank capacity of 0.6 L (0.16 US gal)):
After Coolant Change: 6.2 L (1.64 US gal)
After Engine Overhaul: 8.1 L (2.14 US gal)
10-7
A
9. Remove, drain, and reinstall the reserve tank.
10. Fill the reserve tank to the MAX mark (A) withHonda Long Life Antifreeze/Coolant Type 2 (P/NOL999-9001).
11. Pour Honda Long Life Antifreeze/Coolant Type 2into the radiator up to the base of the filler neck.
NOTE:• Always use Honda Long Life Antifreeze/Coolant
Type 2 (P/N OL999-9001). Using a non-Hondacoolant can result in corrosion, causing thecooling system to malfunction or fail.
• Honda Long Life Antifreeze/Coolant Type 2 is amixture of 50 % antifreeze and 50 % water. Donot add water.
12. Install the radiator cap loosely.
13. Start the engine and let it run until it warms up (theradiator fan comes on at least twice).
14. Turn off the engine. Check the level in the radiatorand add Honda Long Life Antifreeze/Coolant Type 2,if needed.
15. Put the radiator cap on tightly, then run the engineagain, and check for leaks.
16. Clean up any spilled engine coolant.
07/05/09 16:42:03 61SJC020_100_0007
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SJC8A00A14400059301KBAT00
10-8
Cooling System
Thermostat Replacement
PIN
THERMOSTAT COVER
GROUND CABLE
RUBBER SEAL
THERMOSTAT
6 x 1.0 mm12 N·m(1.2 kgf·m, 8.7 lbf·ft)
1.
2. Drain the engine coolant (see page 10-6).
3. Remove the ground cable and thermostat cover, then remove the thermostat.
4. Install the new thermostat with a new rubber seal.
5. Refill the radiator with engine coolant, then bleed air from the cooling system (see step 9 on page 10-7).
6. Clean up any spilled engine coolant.
Replace.
Install with pin up.
07/05/09 16:42:04 61SJC020_100_0008
Disconnect the breather pipe, then remove the air intake duct (see step 9 on page 5-2).
01
02
03
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SJC8A00A14400065091KBAT00
10-9
Water Passage Replacement
A
B
A B C
D
A
B
1. Drain the engine coolant (see page 10-6).
2. Remove the intake manifold (see page 9-3).
3. Remove the upper radiator hose (A) and lowerradiator hose (B).
4. Remove the water bypass hose (A) and groundcable (B).
5. Remove the harness holder mounting bolt (C), thenremove the harness holder (D) from the bracket.
6. Remove the heater hoses.
7. Remove the engine wire harness connectors fromthe water passage.
• Engine coolant temperature (ECT) sensor 1connector
• Engine coolant temperature (ECT) sensor 2connector
• Exhaust gas recirculation (EGR) valve connector
8. Remove the water passage (A) and connecting pipe(B).
(cont’d)
07/05/09 16:42:04 61SJC020_100_0009
0506
07
10-10
Cooling System
Water Passage Replacement (cont’d)
A
D
F
G
E
H
6 x 1.0 mm12 N·m(1.2 kgf·m, 8.7 lbf·ft)
I
H
8 x 1.25 mm22 N·m(2.2 kgf·m, 16 lbf·ft)
B12 N·m(1.2 kgf·m, 8.7 lbf·ft)
C12 N·m(1.2 kgf·m, 8.7 lbf·ft)
B
A
D
8 x 1.25 mm22 N·m(2.2 kgf·m, 16 lbf·ft)
C
C
9. Remove the EGR valve (A), ECT sensor 1 (B), ECTsensor 2 (C), thermostat cover (D), and thermostat(E).
10. Install the new rubber seal (F) onto the thermostat,then install the thermostat with pin (G) up, andinstall the thermostat cover.
11. Install the ECT sensor 1 and ECT sensor 2, using thenew O-rings (H).
12. Install the EGR valve, using a new gasket (I).
13. Install the connecting pipe (A) and water passage(B), using the new O-rings (C) and new gaskets (D).
14. Install the heater hoses.
07/05/09 16:42:05 61SJC020_100_0010
08
09
10-11
C D
A
6 x 1.0 mm12 N·m(1.2 kgf·m, 8.7 lbf·ft)
B6 x 1.0 mm12 N·m(1.2 kgf·m, 8.7 lbf·ft)
A
B
15. Install harness holder (A) to the bracket, thentighten the mounting bolt (B).
16. Install the water bypass hose (C) and ground cable(D).
17. Install the upper radiator hose (A) and lowerradiator hose (B).
18. Install the intake manifold (see page 9-5).
19. After installation, check that all tubes, hoses andconnectors are installed correctly.
20. Refill the radiator with engine coolant, then bleedair from the cooling system (see step 9 on page10-7).
21. Clean up any spilled engine coolant.
07/05/09 16:42:05 61SJC020_100_0011
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02
03
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10-12
Cooling System
Radiator and Fan Replacement
A
C
A
B
B
A
B
1. Drain the engine coolant (see page 10-6).
2. Remove the front air intake duct.
3. Remove the bulkhead cover.
4. Disconnect the fan motor connectors (A), thenremove the harness clamps (B) and reservoir tankhose (C).
5. Remove the upper radiator hose (A) and lowerradiator hose (B).
07/05/09 16:42:06 61SJC020_100_0012
05
06
07
10-13
A
B
A
A B A
6. Remove the splash shield.
7. Remove the automatic transmission fluid (ATF)cooler hoses (A) from the radiator, then plug theline and hose.
8. Unclamp the ATF cooler hoses clamp (B) on theATF cooler line.
9. Remove the harness clamps (A) and A/Ccompressor clutch connector (B) from the A/Ccondenser fan shroud.
(cont’d)
07/05/09 16:42:07 61SJC020_100_0013
08
10-14
Cooling System
Radiator and Fan Replacement (cont’d)
UPPER RADIATOR HOSE
LOWER RADIATOR HOSE
RADIATOR FAN SHROUD
RADIATOR FAN MOTOR
A/C CONDENSER FAN/SHROUD ASSEMBLY
RADIATOR FAN
LOWER CUSHION
RADIATOR
DRAIN PLUG
RESERVE TANK
UPPER BRACKETAND CUSHION
RADIATOR CAP
6 x 1.0 mm9.8 N·m(1.0 kgf·m, 7.2 lbf·ft)
6.0 N·m(0.61 kgf·m, 4.4 lbf·ft)
6 x 1.0 mm7.1 N·m(0.72 kgf·m, 5.2 lbf·ft)
6 x 1.0 mm7.1 N·m(0.72 kgf·m, 5.2 lbf·ft)
O-RING
10. Remove the upper bracket cushions, then pull up the radiator.
11. Remove the fan shroud assemblies and other parts from the radiator.
12. Install the radiator in the reverse order of removal. Make sure the upper and lower cushions are set securely.
13. Fill the radiator with engine coolant, then bleed air from the cooling system (see step 9 on page 10-7).
Replace.
07/05/09 16:42:07 61SJC020_100_0014
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10-15
Fan Controls
Component Location Index
AUXILIARY UNDER-HOOD RELAY BOX
A/C CONDENSER FANRELAY
RADIATOR FAN RELAY
FAN CONTROL RELAY
A/C CONDENSER FANASSEMBLY
ENGINE COOLANTTEMPERATURE (ECT)SENSOR 1
RADIATOR FAN ASSEMBLY
ENGINE COOLANTTEMPERATURE (ECT)SENSOR 2
Test, page 22-75
Test, page 22-75
Test, page 22-75
Motor Test, page 10-4
Replacement, page 11-201
Motor Test, page 10-4
Replacement, page 11-201
07/05/09 16:42:09 61SJC020_100_0015
SJC8A00A14426100000HBAT00
Symptom Diagnostic Procedure Also check for
10-16
Fan Controls
Symptom Troubleshooting Index
••
Engine overheats 1.2.
3.
4.5.6.
7.8.9.10.
11.12.
Check the coolant level.
A/C condenser.
Check for damaged or deformed fan shroud.Inspect the fan motors (see page 10-4) or fanrelays (see page 22-75).Check the radiator cap (see page 10-3).Check the thermostat (see page 10-4).Inspect the water pump (see page 10-5).Check for a plugged or deteriorated radiatorhoses.Check for plugged heater core or hoses.Check for a damaged cylinder head gasket.
The radiator fan runs at low speed,but it does not run at high speedwhen the engine coolanttemperature is above 206 °F(97 °C)
Radiator fan high speed circuit troubleshooting(see page 10-18).
Cleanliness andtightness of allconnectors
With the A/C off and the enginecoolant temperature at 206 °F(97 °C) or below, the A/Ccondenser fan runs at high speedand the radiator fan does not run.When the engine coolanttemperature is above 206 °F(97 °C), both fans run at highspeed
Remove the fan control relay, and test.If the relay is faulty, replace it.If the relay is OK, check for a short in the wirebetween fan control relay 5P socket terminal No. 1and condenser fan motor 2P connector terminalNo. 1.
Cleanliness andtightness of allconnectors
The radiator fan runs at highspeed with the ignition switch ON(II), the A/C off, and the enginecoolant temperature below 204 °F(95 °C)
Check for a short in the wire between radiator fanrelay 4P socket terminal No. 3 and PCM connectorterminal A5.
Cleanliness andtightness of allconnectors
Both the radiator fan and the A/Ccondenser fan run at low speedwith the ignition switch ON (II)and the A/C off
Check for a short in the wire between A/C condenserfan relay 4P socket terminal No. 3 and PCM connectorterminal A4.
Cleanliness andtightness of allconnectors
Both the radiator fan and the A/Ccondenser fan do not run at lowspeed with the A/C on
Radiator and A/C condenser fans low speed circuittroubleshooting (see page 21-40).
Cleanliness andtightness of allconnectors
The A/C condenser fan does notrun at all. The radiator fan doesnot run at low speed, but it runs athigh speed
A/C condenser fans high speed circuittroubleshooting (see page 21-44).
Cleanliness andtightness of allconnectors
Both the radiator fan and the A/Ccondenser fan do not run at highspeed when the engine coolanttemperature is above 206 °F(97 °C)
Check for an open in the wire between radiator fanrelay 4P socket terminal No. 3 and PCM connectorterminal A5.
Cleanliness andtightness of allconnectors
07/05/09 16:42:09 61SJC020_100_0016
Check for any engine coolant leaks(from gaskets, hoses, O-rings, etc.).
Check for deteriorated coolant.
Check for dirt, leaves, or insects on radiator and
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10-17
Circuit Diagram
TW SG2 TW2
MRLYFANLFANH
D7X1D16
A4D10
D2 D5
E6
G1
YEL/GRNYEL
PCM
GRN
BLU/BLK
BLK/YEL
WHT/RED
YEL
YEL
No.23(7.5 A)
WHT/GRN
WHTBLK/YEL
No.8 (15 A)
GRN/REDGRN/YELRED/WHT
C27 C14 C36
A6A5 A4
5 V
YEL/WHT RED/YEL
(7.5 A)No.30
IG2 HOT in ON (III)
2 3
41
GRN/YEL
2 3
41
G201
GRN
BLK
1 5
4 2 3
GRN
BLU/BLK
1
2
1
2
No.23 (IG) (50 A)
BLU/YEL
UNDER HOOD FUSE/RELAY BOX
BATTERY
IGNITION SWITCH
BLK/YEL
G201
No.22 (BAT) (120 A)
BLU/BLK
BLK
No.19 (30 A) No.20 (30 A)
RADIATORFANMOTOR
FANCONTROLRELAY
A/CCONDENSERFANMOTOR
PGM FIMAINRELAY 1
RADIATORFANRELAY
A/CCONDENSERFANRELAY
ENGINE COOLANTTEMPERATURE(ECT) SENSOR 1
ENGINE COOLANTTEMPERATURE(ECT) SENSOR 2
UNDER DASHFUSE/RELAYBOX
AUXILIARYUNDER HOOD RELAY BOX
42
IG2
BAT
07/05/09 16:42:09 61SJC020_100_0017
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02
03
SJC8A00A14426149419FAAT00
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-
-
-
-
-
-
-
-
-
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
10-18
Fan Controls
Radiator Fan High Speed Circuit Troubleshooting
RADIATOR FAN RELAY 4P SOCKET
RADIATOR FAN RELAY 4P SOCKET
JUMPER WIRE
RADIATOR FAN RELAY 4P SOCKET
1. Check the No. 19 (30 A) fuse in the under-hoodfuse/relay box, and the No. 23 (7.5 A) fuse in theunder-dash fuse/relay box.
Go to step 2.
Replace the fuse(s) and recheck.
2. Remove the radiator fan relay from the auxiliaryunder-hood relay box and test it (see page 22-75).
Go to step 3.
Replace the radiator fan relay.
3. Measure the voltage between the radiator fan relay4P socket terminal No. 1 and the body ground.
Go to step 4.
Repair open in the wire between radiator fanrelay 4P socket terminal No. 1 and the under-hoodfuse/relay box.
4. Connect radiator fan relay 4P socket terminalsNo. 1 and No. 2 with a jumper wire.
Go to step 5.
Repair open in the wire between the radiatorfan relay 4P socket terminal No. 2 and radiator fanmotor 2P connector terminal No. 2.
5. Turn the ignition switch ON (II).
6. Measure voltage between radiator fan relay 4Psocket terminal No. 4 and the body ground.
Repair open in the wire between the radiatorfan relay 4P socket terminal No. 3 and thepowertrain control module (PCM) (A5).
Repair open in the wire between the radiatorfan relay 4P socket terminal No. 4 and the under-dash fuse/relay box.
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Are the fuses OK ?
Is the relay OK ?
Is there battery voltage?
Does the radiator fan run at high speed?
Is there battery voltage?
07/05/09 16:42:10 61SJC020_100_0018