Honda Accord Electrical Troubleshooting Manual — part 43
63
Radiator and Condenser Fans
BLK/YEL
A/C
on
output
L4
1
2
A/C
Pressure
Switch
1 = Low
2 = High
1
BLU/RED
2
HOT AT ALL TIMES
1
3
2
4
Radiator
Fan Relay
20A
1
3
2
4
Condenser
Fan Relay
20A
Under-
hood
Fuse/
Relay
Box
7.5A
Driver’s
Under-dash
Fuse/Relay
Box
HOT IN ON
BLK/YEL
BLK/YEL
(Not Used)
M
BLK
G101
1
2
6
C101
GRN
GRN
GRN
YEL/GRN
1
C201
YEL/GRN
5
Heater
Control
Panel
Passenger’s
Under-dash
Fuse/Relay Box
PCM or ECM
BLU/RED
GRN
(FANC)
Fan
control
(ACS)
A/C ON
input
(Not
Used)
M
BLU/BLK
1
BLK
BLU/YEL
1
BLK
Radiator
Fan Motor
A/C
Condenser
Fan Motor
2
2
G201
Radiator
Fan Switch
1 = Above 199
F (93
C)
GRN
See page 10-5.
See
page 10.
(Not Used)
BLK
BLK
BLU or
BLU/BLK
BLK
BLU/BLK
BLK
See page 10-5.
1
BLK
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–
63-1
Radiator and Condenser Fans
BLK
See page
14-8.
BLK/YEL
PCM
YEL
A/C
on
output
V6
1
2
1
BLU/RED
2
HOT AT ALL TIMES
1
3
2
4
Radiator
Fan
Relay
20A
1
3
2
4
Condenser
Fan
Relay
20A
15A
Driver’s
Under-dash
Fuse/Relay
Box
HOT IN ON OR START
(Not Used)
M
BLK
1
2
4
C103
GRN
GRN
YEL/GRN
1
C201
YEL/GRN
Climate
Control Unit
Passenger’s
Under-dash
Fuse/Relay
Box
BLU/RED
GRN
(FANC)
Fan
control
(ACS)
A/C ON
input
M
BLU/YEL
1
BLK
BLU/BLK
1
Radiator
Fan
Motor
A/C
Condenser
Fan Motor
2
2
G201
Radiator
Fan
Switch A
1 = Above
199
F
(93
C)
WHT
6
1
14
C201
GRN
Radiator
Fan
Control
Module
YEL/WHT
3
13
YEL
YEL/WHT
7
7.5A
HOT IN ON
2
BLK/YEL
8
GRN
18
C301
GRN
4
BLK
G401
BLK
G101
2
1
3
WHT/GRN
WHT/GRN
Radiator
Fan
Switch B
(See S/M
page 10-14)
1 = Above
225
F
(107
C)
5
19
WHT/GRN
WHT
5
C203
GRN
Under-
hood
Fuse/
Relay
Box
See page 10-5.
BLK
(Not
Used)
BLU/BLK
BLK
A/C Pressure
Switch
1 = Low
2 = High
YEL/GRN
A2
Manual A/C
A/C
on
output
Heater
Control
Panel
YEL/GRN
5
Auto A/C
BLK
BLK/YEL
BLK
BLU
BLK
See page 14-3 (’98-’99)
or 14-5 (’00-’02).
BLK
1
1
BLK
GRY
GRY
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63-2
Radiator and Condenser Fans
How the Circuit Works
L4
Voltage is provided at all times to the radiator fan
relay contacts through fuse 57 and to the
condenser fan relay contacts through fuse 58. With
the ignition switch ON (II), voltage is provided to
the coils of the relays through fuse 3 (in the
driver’s under-dash fuse/relay box).
The relays are grounded by either the radiator fan
switch or by the PCM or ECM. Grounding the
relays energizes their coils and applies battery
voltage to the radiator and condenser fan motors.
Both fans then run until ground is removed from
the relay coils.
Refer to the Service Manual (Section 10,
Cooling System) for specific tests and
troubleshooting procedures.
V6
Voltage is provided at all times to the radiator fan
relay contacts through fuse 57 and to the
condenser fan relay contacts through fuse 58. The
radiator fan control module controls power to the
coils of the relays.
The radiator fan control module is supplied battery
voltage at all times through fuse 58. When the
ignition switch ON (II), voltage is also supplied to
the module through fuses 3 and 6 (in the driver’s
under-dash fuse/relay box).
The relays are grounded by either radiator fan
switch A or the PCM. Grounding the relays
energizes their coils and applies battery voltage
to the radiator and condenser fan motors. Both
fans then run until ground is removed from the
relay coils.
If the engine coolant temperature is more than 107
(225
F) when you turn the ignition switch to LOCK
(0), the radiator fan control module will turn on the
radiator fan and let it run for about 15 minutes.
Refer to the Service Manual (Section 10,
Cooling System) for specific tests and
troubleshooting procedures.
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Rear Window Defogger
Manual A/C
HOT IN ON
7.5A
Driver’s
Under-dash
Fuse/Relay
Box
Passenger’s
Under-dash
Fuse/Relay
Box
BLK/YEL
BLK/YEL
Rear
Window
Defogger
B1
B2
B
A
A
Window
Antenna
Coil
BLK/GRN
(Not Used)
4
9
Heater Control Panel
(Rear window defogger
switch, defogger timer
circuit, and ON indicator
LED are built into the
heater control panel)
BRN/YEL
HOT AT ALL TIMES
40A
Under-hood
Fuse/Relay
Box
WHT/GRN
BLK
BLK
G401
2
4
1
3
Rear window
defogger
relay control
Rear Window
Defogger
Relay
BLK/GRN
BLK
BLK/YEL
BLK/YEL
2
Ignition
input
Ground
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