Honda Accord Electrical Troubleshooting Manual — part 41
50
Multiplex Control System
Canada
US: DX and LX
See
page
14-11.
G551
20A
Under-hood
Fuse/Relay
Box
HOT AT ALL TIMES
BLK
G401
WHT/YEL
7
6
A15
BRN
A1
Ignition
Key
Light
Steering
Lock
Ignition key
light control
Key in
ignition
input
Ignition
Key Switch
1 = Key in
ignition
1
Steering
Lock
BLK
1
BLK
BLU/WHT
Security System
Connector
(Option)
2
BLU/WHT
BLU/WHT
Commu-
nication
line
Check
connector
input
BLK
Ground
A15
A14
A2
3
A13
B1
Commu-
nication
line
Commu-
nication
line
Battery
input
A19
Ground
B
Door Multiplex
Control Unit
A1
WHT/BLK
Battery
input
A12
WHT/
YEL
(Not
used)
7.5A
Driver’s
Under-dash
Fuse/Relay
Box
HOT IN ON OR START
7.5A
HOT AT ALL TIMES
PNK
Ignition
input
Driver’s
Multiplex
Control
Unit
Battery
input
YEL
Ignition
input
A22
WHT/
YEL
B9
Commu-
nication
line
G581
A8
Ground
Passenger’s
Multiplex
Control Unit
A
A24
A24
Multiplex
Control
Inspection
Connector
Passenger’s
Under-dash
Fuse/Relay
Box
WHT/YEL
WHT/YEL
Interlock System
BLK
BLK
See page
10-12.
WHT/
YEL
See page
10-9.
See page
10-12.
See
page
10-9.
A13
See
page
14-12.
See page
10-12.
A
B
WHT/
YEL
WHT/
YEL
Buzzer
See page
14-12.
BLK
C402
YEL
See
page
14-9.
G401
A12
Ground
BLK
BLK
B22
Ground
G504
BLK
B11
G503
BLK
Ground
BLK
BLK
BLK
See page
14-13.
See page
14-13.
BLK
BLK
s
t
s
t
60
HVAC
See page
14-6.
Manual A/C – Blower Controls
BLK
G202
3
C202
YEL/BLK
YEL/BLK
7.5A
BLK/YEL
BLK/YEL
BLK
G401
4
3
2
1
Off
GRN
BLU/RED
BLU
BLU/BLK
BLU/YEL
Heater
Fan
Switch
1
Blower
Resistor
M
4
5
6
3
2
5
4
2
1
BLU/RED
Blower
Motor
BLU/RED
2
1
Heater
Control
Panel
21
4
1
3
2
40A
HOT AT ALL TIMES
Driver’s
Under-dash
Fuse/Relay
Box
Under-hood
Fuse/Relay
Box
Blower
Motor
Relay
See page
10-5.
A/C Compressor Controls
BLK
See page
14-8.
BLK
HOT IN ON
s
t
s
t
+
–
60-1
HVAC
See page
14-8.
See page
10-12.
Manual A/C – Air Delivery
7.5A
Driver’s
Under-dash
Fuse/Relay
Box
HOT IN ON
16
GRY
7
S5V
19
PNK/BLK
3
AMD-P
13
RED/WHT
1
M-COOL
12
RED/YEL
2
M-HOT
14
BLU/WHT
2
M-VENT
15
BLU/BLK
1
M-DEF
18
GRN/BLK
6
MODE1
8
GRN/YEL
5
MODE2
7
LT GRN/
BLK
4
MODE3
6
BLU/GRN
3
MODE4
17
YEL/GRN
20
BRN
2
9
BLK
G401
Heater
Control
Panel
1
YEL/GRN
Mode
Control
Motor
Air Mix
Control
Motor
5
YEL/GRN
S-COM
7
YEL/GRN
S-COM
Evaporator
Temperature
Sensor
7.5A
Passenger’s
Under-dash
Fuse/Relay
Box
HOT AT ALL TIMES
5
GRN/RED
11
7
1
Recirculation
Control
Motor
BLK/YEL
1
IG2
BLK/YEL
WHT/YEL
3
2
BLK/YEL
FRS
REC
GRN/WHT
See page 10-12.
WHT/YEL
10
22
RED/BLK
RED
BLK
GRY
GRY
s
t
s
t
60-2
HVAC
See page
14-8.
See page
10-5.
BLK/YEL
BLK/YEL
RED
(ACC)
Relay control
A/C ON input
(ACS)
Manual A/C – Compressor Controls
7.5A
1
4
2
3
A/C
Compressor
Clutch Relay
Under-hood
Fuse/Relay
Box
20A
HOT AT ALL TIMES
Driver’s
Under-dash
Fuse/Relay
Box
BLK/YEL
BLK
G401
4
3
2
1
OFF
Heater
Fan
Switch
1
GRN
2
5
21
YEL/GRN
1
C201
YEL/GRN
7.5A
WHT/YEL
Passenger’s
Under-dash
Fuse/Relay
Box
2
3
BLU/RED
RED
21
C204
1
2
A/C
Pressure
Switch
1 = Low
2 = High
1
Passenger’s
Under-dash
Fuse/Relay
Box
PCM or ECM
RED
A/C
Compressor
Clutch
BLK
G401
9
Heater
Control
Panel
BLU/RED
2
BLK/YEL
WHT/YEL
See page 10-12.
See
page 10.
Blower controls
10
22
RED/BLK
RED
BLK
LT BLU
YEL/GRN
17
20
YEL/GRN
GRY
2
Evaporator
Temperature
Sensor
BRN
GRY
1
BLK
HOT IN ON
HOT AT ALL TIMES
LT BLU
LT BLU
A/C
Compressor
See page
10-12.
s
t
s
t
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