Index Honda Honda Accord Electrical Troubleshooting Manual - 1998-2002 year

Content .. 41 42 43 44 ..

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

PHOTO 9
VIEW 68

7.5A

Driver’s
Under-dash
Fuse/Relay
Box

PHOTO 85
VIEW 60

HOT IN ON

BLK/YEL

BLK/YEL

(Not Used)

M

BLK

G101

1

2

6

C101

PHOTO 34
VIEW 29

GRN

GRN

GRN

YEL/GRN

1

C201

PHOTO 120
VIEW 45

YEL/GRN

5

Heater
Control
Panel

PHOTO 170
VIEW 54

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

(Not Used)

BLK

BLK

BLU or

BLU/BLK

BLK

BLU/BLK

BLK

1

BLK

How the Circuit Works

How the Circuit Works

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+

–

63-1

Radiator and Condenser Fans

BLK

See page
14-8.

BLK/YEL

PCM

PHOTO 114
VIEW 66

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

PHOTO 85
VIEW 60

HOT IN ON OR START

(Not Used)

M

BLK

1

2

4

C103

PHOTO 63
VIEW 41

GRN

GRN

YEL/GRN

1

C201

PHOTO 120
VIEW 45

YEL/GRN

Climate
Control Unit

PHOTO 83
VIEW 57

Passenger’s
Under-dash
Fuse/Relay
Box

PHOTO 91
VIEW 67

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

PHOTO 120
VIEW 45

GRN

Radiator
Fan
Control
Module

PHOTO 117
VIEW 28

YEL/WHT

3

13

YEL

YEL/WHT

7

7.5A

HOT IN ON

2

BLK/YEL

8

GRN

18

C301

PHOTO 98
VIEW 51

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

PHOTO 9
VIEW 68

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

PHOTO 170
VIEW 54

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

How the Circuit Works

How the Circuit Works

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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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64

Rear Window Defogger

Manual A/C

HOT IN ON

7.5A

Driver’s
Under-dash
Fuse/Relay
Box

PHOTO 85
VIEW 60

Passenger’s
Under-dash
Fuse/Relay
Box

PHOTO 91
VIEW 67

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)

PHOTO 170
VIEW 54

BRN/YEL

HOT AT ALL TIMES

40A

Under-hood
Fuse/Relay
Box

PHOTO 9
VIEW 68

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

How the Circuit Works

How the Circuit Works

s

t

s

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