Honda Odyssey 2004. Manual — part 74
S0X4A00A14426100000HBAT01
Symptom
Diagnostic procedure
Also check for
10-20
Fan Controls
Symptom Troubleshooting Index
•
•
Radiator fan does not run at all,
but condenser fan runs with A/C
ON
Radiator and condenser fan circuit troubleshooting A (see
page 10-22).
Both radiator fan and condenser
fan do not run on low or high
speed with the A/C ON or when
the engine coolant temperature
is above 210°F (99°C)
Check the No. 3 (15A) fuse in the driver’s under-dash
fuse/relay box.
If the fuse is faulty, replace it.
If the fuse is OK, repair the open in the wire between the
No. 3 (15A) fuse in the driver’s under-dash fuse/relay
box and the radiator and condenser fan relays.
Condenser fan runs but radiator
fan does not run when the
engine coolant temperature is
above 199°F (93°C), but both
fans run with the A/C ON
Replace the radiator fan control relay.
Both the radiator fan and
condenser fan do not run at low
speed when the engine coolant
temperature is above 199°F
(93°C), but both fans run with
A/C ON and when the engine
coolant temperature is above
210°F (99°C)
Radiator and condenser fan circuit troubleshooting B (see
page 10-23).
Both radiator and condenser
fans do not run when the
engine coolant temperature is
above 199°F (93°C), but radiator
fan runs with A/C ON
Radiator and condenser fan low speed circuit
troubleshooting (see page 21-27).
Both radiator fan and condenser
fan run with ignition switch ON
(II), with A/C OFF, and when the
engine coolant temperature is
below 199°F (93°C)
Radiator and condenser fan circuit troubleshooting C (see
page 10-24).
Both radiator fan and condenser
fan do not run at high speed
with the A/C ON
Radiator and condenser fan high speed circuit
troubleshooting (see page 21-31).
Both radiator fan speed and
condenser fan speed do not
change from low to high when
the engine coolant temperature
is above 210°F (99°C), but both
fans speed change with A/C ON
Radiator and condenser fan high speed circuit
troubleshooting (see page 10-24).
Condenser fan speed does not
change from low to high with
A/C ON or the when engine
coolant temperature is above
210°F (99°C)
Condenser fan high speed circuit troubleshooting (see
page 21-31).
03/07/29 09:15:23 61S0X050_100_0020
01
S0X4A00A14426100000EAAT00
−
−
−
10-21
Circuit Diagram
IG2 HOT in ON (II)
2
3
1
4
3
2
4
1
IGNITION SWITCH
1
2
2
1
BOX
FUSE/RELAY
UNDER DASH
PASSENGER’S
G201
3
2
4
BLK
BLU/RED
BLU/RED
FAN MAIN
RELAY
RADIATOR
5
BLK/YEL
1
BLU/BLK
BLU/BLK
1
2
BLK
FAN SWITCH B
RADIATOR
G101
Closed : Above
210°F (99°C)
BLU/RED
BLU/RED
GRN
BLU/RED
GRN
1
2
BLU/RED
BLK/YEL
BLK/YEL
FAN MOTOR
CONDENSER
BLU/RED
SYSTEM
AIR
CONDITIONING
DRIVER’S
GRN
BLU/YEL
RELAY
FAN
CONDENSER
UNDER HOOD FUSE/RELAY BOX
BATTERY
No.3
(7.5A)
BAT
IG2
199°F (93°C)
Closed : Above
UNDER DASH
G201
G101
No.41 (120A)
RADIATOR
FAN
RELAY
BLU/BLK
RADIATOR
WHT
YEL
FUSE/RELAY
BOX
RADIATOR
FAN SWITCH A
BLK
BLK
No.42 (50A)
No.57 (30A)
No.58 (30A)
FAN MOTOR
GRN
03/07/29 09:15:23 61S0X050_100_0021
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−
−
−
−
−
−
−
*01
*02
01
S0X4A00A14426149101FAAT31
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
10-22
Fan Controls
Radiator and Condenser Fan Circuit Troubleshooting A
RADIATOR FAN RELAY 4P SOCKET
RADIATOR FAN RELAY 4P SOCKET
JUMPER
WIRE
RADIATOR FAN RELAY 4P SOCKET
NOTE: Refer to the symptom troubleshooting index
before troubleshooting.
1. Check the No. 57 (30A) fuse in the under-hood
fuse/relay box.
Go to step 2.
Check for a short in the wire between the
radiator fan relay, radiator fan motor and fan
control relay, condenser fan motor or a faulty fan
motor.
2. Remove the radiator fan relay from the under-hood
fuse/relay box and test it (see page 22-88).
Go to step 3.
Replace radiator fan relay.
3. Measure the voltage between radiator fan relay 4P
socket terminal No. 1 and body ground.
Go to step 4.
Replace the under-hood fuse/relay box.
4. Connect a jumper wire between radiator fan relay
4P socket terminals No. 1 and No. 2.
Go to step 5.
Go to step 7.
5. Disconnect the jumper wire, and turn the ignition
switch ON (II).
6. Measure the voltage between radiator fan relay 4P
socket terminal No. 4 and body ground.
Repair an open in the wire between the
radiator fan relay and the A/C pressure switch.
Replace the under-hood fuse/relay box.
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Is the f use OK ?
Is the r elay OK ?
Is ther e batter y voltage?
Does the r adiator f an r un?
Is ther e batter y voltage?
03/07/29 09:15:24 61S0X050_100_0022
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−
−
−
−
−
−
−
02
21
22
S0X4A00A14426149101FAAT32
YES
NO
YES
NO
YES
NO
YES
NO
10-23
10-23
Radiator and Condenser Fan Circuit
Troubleshooting B
RADIATOR FAN MOTOR 2P CONNECTOR
BLU/BLK
GRN
RADIATOR FAN SWITCH A
2P CONNECTOR
RADIATOR FAN SWITCH A
2P CONNECTOR
BLK
7. Disconnect the radiator fan motor 2P connector.
8. Measure the voltage between fan motor 2P
connector terminal No. 2 and body ground.
Go to step 9.
Repair an open in the wire between radiator
fan relay 4P socket terminal No. 2 and radiator 2P
connector terminal No. 2.
9. Disconnect the jumper wire.
10. Test the radiator fan motor (see page 10-11).
Repair an open in the wire between radiator
fan motor 2P connector terminal No. 1 and body
ground G201.
Replace the radiator fan motor.
NOTE: Refer to the symptom troubleshooting index
before troubleshooting.
1. Disconnect the radiator fan switch A 2P connector.
2. Turn the ignition switch ON (II).
3. Measure the voltage between the radiator fan
switch A 2P connector terminal No. 2 and body
ground.
Go to step 4.
Repair an open in the wire between the
radiator fan switch A connector and under-hood
fuse/relay box.
4. Turn the ignition switch OFF, and check for
continuity between the radiator fan switch A 2P
connector terminal No. 1 and body ground.
Replace radiator fan switch A.
Check for an open in the wire between the
radiator fan switch A connector and body ground. If
the wire is OK, check for poor ground at G101.
Wire side of female terminals
Wire side of
female terminals
Wire side of
female terminals
Is ther e batter y voltage?
Is the f an motor OK ?
Is ther e batter y voltage?
Is ther e continuity?
03/07/29 09:15:24 61S0X050_100_0023
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