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10-20Cooling System
Radiator and Fan Replacement (cont’d)
B
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)A
C
C
5. Disconnect the reservoir hose (A) and remove the radiator cap base mounting bolts (B), and the
radiator upper brackets (C) and bolts (D).
6. Disconnect the upper radiator hose.
7. Raise the vehicle on the lift. 8. Remove the splash shield.
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Î Î
10-21
BA
C
A B
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
A
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft) C
9. Disconnect the engine coolant temperature (ECT)
sensor 2 connector (A), and remove the harness
clamp (B).
10. Disconnect the lower radiator hose (C) from the radiator.
11. A/T model: Disconnect the automatic transmission fluid (ATF) cooler hoses (A), then plug the lines and
the hoses. 12. Lower the vehicle on the lift.
13. Remove the condenser bracket mounting bolts (A)
and the bulkhead mounting bolts (B), then remove
the bulkhead (C).
(cont’d)
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10-22Cooling System
Radiator and Fan Replacement (cont’d)
RADIATOR FAN MOTOR
6x1.0mm
7 N·m
(0.7 kgf·m, 5 lbf·ft) RADIATOR FAN
UPPER RADIATOR HOSE
LOWER RADIATOR HOSE
O-RING
RADIATOR CAP
RADIATOR
O-RING LOWER CUSHION
DRAIN PLUG
6x1.0mm
7 N·m
(0.7 kgf·m, 5 lbf·ft)
A/C CONDENSER
FAN/SHROUD ASSEMBLY
RADIATOR FAN SHROUD
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
3.85 N·m
(0.393 kgf·m, 2.84 lbf·ft)
6.0 N·m
(0.61 kgf·m, 4.4 lbf·ft)
QUICK CONNECTOR
O-RING
14. Pull up the radiator, then remove the fan shroud assemblies and other parts from the radiator.
15. Install the radiator in the reverse order of removal. Make sure the upper and lower cushions are set securely.
16. Connect the lower radiator hose to the radiator.
17. Install the bulkhead in the reverse order of removal. Apply body paint to the bulkhead mounting bolts.
18. Do the battery installation procedure (see page 22-69).
19. Fill the radiator with engine coolant, and bleed the air from the cooling system with heater valve open (see step 6 on page 10-8).
20. Clean up any spilled engine coolant.
Replace. Replace.
Replace.
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10-23
Fan Controls
Component Location Index
FAN CONTROL RELAY
UNDER-HOOD FUSE/RELAY BOX
RADIATOR FAN RELAY
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 1
A/C CONDENSER FAN RELAY
Test, page 22-70
Test, page 22-70
Motor Test, page 10-5
Replacement, page 10-19 Motor Test, page 10-5
Replacement, page 10-19 Replacement, page 11-225Replacement, page 11-225
Test, page 22-70
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Symptom Diagnostic Procedure Also check for
10-24
Fan Controls
Symptom Troubleshooting Index
Engine overheats
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12. Check the coolant level.
Check for engine coolant leakage (from gaskets,
hoses, O-rings, etc.).
Check for dirt, leaves, or insects on radiator
and A/C condenser.
Check for deteriorated coolant.
Check for a damaged or deformed fan shroud.
Inspect the fan motors (see page 10-5) or fan
relays (see page 22-70).
Check the radiator cap (see page 10-4).
Check the thermostat (see page 10-5).
Inspect the water pump (see page 10-6).
Check for a clogged or deteriorated radiator
hoses.
Check for clogged heater core or hoses.
Check for a damaged cylinder head gasket.
The radiator fan does not run at
high speed Radiator fan high speed circuit troubleshooting
(see page 10-26). Cleanliness and
tightness of all
connectors
Both the radiator fan and the A/C
condenser fan do not run at low
speed Radiator and A/C condenser fans low speed circuit
troubleshooting (see page 21-56).
Cleanliness and
tightness of all
connectors
The A/C condenser fan does not
runathighspeed A/C condenser fan high speed circuit troubleshooting
(see page 21-60). Cleanliness and
tightness of all
connectors
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10-25
Circuit Diagram
ECT2
SG6
SG2
ECT1 FANH
FANL
SUBRLY IG2HOTinON(II)
PNK
5V No. 15 (7.5 A)
A21
PUR
ECM/PCM
2G301
BLK
2
1
No. 11 (15 A)
(10 A) No. 36
B23
RED/WHT GRN/BLK B33
BLU GRY
BRN
A33
BLK GRN A9 IGNITION SWITCH
IG2
BAT
RED
3
2 5
4 1
A4
A5 13
4
2
1 2 23 4
1 No. 2 (50 A)
BLK
UNDER-HOOD FUSE/RELAY BOX
BATTERY
G301No. 1 (100 A)
No. 6 (20 A)
A/C
CONDENSER
FAN RELAY
ENGINE COOLANT
TEMPERATURE
(ECT) SENSOR 1
A/C
CONDENSER
FAN MOTOR
FAN
CONTROL
RELAY
RADIATOR
FAN
MOTOR
ENGINE COOLANT
TEMPERATURE
(ECT) SENSOR 2 RADIATOR
FAN
RELAY
PGM-FI
SUB RELAY
H1
3 4
ORN
G12
D1
F16
F7
F2
F12
F14
F1
F11 No. 7 (20 A)
21
1 UNDER-DASH
FUSE/RELAY
BOX
BRN
WHT
43
12 C3
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Î
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µ
µ
µ
µ
µ
µ µ
µ
YES
NO
YES
NO
YES
NO
YES
NO
10-26Fan Controls
Radiator Fan High Speed Circuit Troubleshooting
RADIATOR FAN RELAY 4P SOCKET
FAN CONTROL RELAY 5P SOCKET
JUMPER WIRE
RADIATOR FAN RELAY 4P SOCKET JUMPER WIRE
1. Check the No. 7 (20 A) fuse in the under-hood fuse/relay box and the No. 36 (10 A) fuse in the under-
dash fuse/relay box.
Reinstall the fuse(s), then go to step 2.
Replace the fuse(s), and recheck. If the fuse
continues to blow, locate and repair the short in the
circuit between the under-hood fuse/relay box and
the radiator fan motor, or between the under-dash
fuse/relay box connector terminal G12, the under-
hood fuse/relay box and the engine control module
(ECM)/powertrain control module (PCM).
2. Remove the radiator fan relay and the fan control relay from the under-hood fuse/relay box, and test
them (see page 22-70).
Go to step 3.
Replace the radiator fan relay and/or fan
control relay.
3. Measure the voltage between the radiator fan relay 4P socket terminal No. 1 and body ground.
Go to step 4.
Replace the under-hood fuse/relay box. 4. Connect fan control relay 5P socket terminals No. 1
andNo.2withajumperwire.
5. Connect radiator fan relay 4P socket terminals No. 1 and No. 2 with a jumper wire.
Go to step 10.
Go to step 6.
Terminal side of female terminals Terminal side of female terminals
Terminal side of female terminals
Ar e t he f uses OK ? Ar e t he r el ay s OK ?
Is there battery voltage? Does t he r ad i at or f an r un at hi gh speed ?
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µ
µ
µ
µ µ
µ
YES
NO
YES
NO YES
NO
10-27
FAN CONTROL RELAY 5P SOCKET
RADIATOR FAN RELAY 4P SOCKET
RADIATOR FAN MOTOR 2P CONNECTOR BRN
6. Remove the jumper wires, then check for continuity
between fan control relay 5P socket terminal No. 2
and body ground.
Go to step 7.
Repair open in the wire between fan control
relay 5P socket terminal No. 2 and body ground.
7. Test the radiator fan motor (see page 10-5).
Go to step 8.
Replace the radiator fan motor (see page
10-19). 8. Check for continuity between radiator fan relay 4P
socket terminal No. 2 and radiator fan motor 2P
connector terminal No. 2.
Go to step 9.
Repair open in the wire between radiator fan
relay 4P socket terminal No. 2 and radiator fan
motor 2P connector terminal No. 2.
(cont’d)
Terminal side of female terminals Terminal side of female terminals
Wire side of female terminals
Is there continuity? I s t he mot or OK ? Is there continuity?
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