Honda Odyssey 2004. Manual — part 399
S0X4A10G10500000000HBAT00
Symptom
Diagnostic procedure
Also check for
21-72
Climate Control
Symptom Troubleshooting Index
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The blower motor does not run
immediately even through the
engine is fully warmed up.
NOTE: The temperature control
dial must be set between 60°F
(18°C) and 90°F (32°C).
ECT sensor circuit
troubleshooting (see page 21-
106)
Cleanliness and tightness of all
connectors
Recirculation control doors do not
change between Fresh and
Recirculate.
Recircuration control motor
circuit troubleshooting (see
page 21-107)
HVAC DTCs (see page 21-67)
Blown fuse No. 3 (7.5A) in the driver’s
under-dash fuse/relay box
Cleanliness and tightness of all
connectors
Blower, heater controls, and A/C
do not work.
Climate control power and
ground circuit troubleshooting
(see page 21-112)
HVAC DTCs (see page 21-67)
Blown fuse No. 54 (40A) in the under-
hood fuse/relay box, No. 3 (7.5A) in the
driver’s under-dash fuse/relay box, and
No. 13 (7.5A) in the passenger’s under-
dash fuse/relay box
Poor ground at G401
Cleanliness and tightness of all
connectors
The climate control panel display
does not work.
Climate control panel
troubleshooting (see page 21-
114)
HVAC DTCs (see page 21-67)
Cleanliness and tightness of all
connectors
The manual switch (With
navigation system) does not work.
Manual switch (With navigation
system) troubleshooting (see
page 21-116)
HVAC DTCs (see page 21-67)
Cleanliness and tightness of all
connectors
Both fans do not run at low speed
with the A/C on when the
refrigerant pressure is below
1,520 kPa (15.5 kgf/cm , 220 psi).
Radiator and condenser fan low
speed circuit troubleshooting
(see page 21-27)
HVAC DTCs (see page 21-67)
Blown fuse No. 58 (30A) in the under-
hood fuse/relay box, and No. 3 (7.5A) in
the driver’s under-dash fuse/relay box
Poor ground at G201
Cleanliness and tightness of all
connectors
Condenser fans does not run at
high speed when the engine
coolant temperature is above
210°F (99°C) or the refrigerant
pressure is above 1,520 kPa (15.5
kgf/cm , 220 psi) with the A/C on.
Condenser fan high speed
circuit troubleshooting (see
page 21-30)
HVAC DTCs (see page 21-67)
Blown fuse No. 3 (7.5A) in the driver’s
under-dash fuse/relay box
Poor ground at G201
Cleanliness and tightness of all
connectors
Both fans do not run at high speed
with the A/C on when the
refrigerant pressure is above
1,520 kPa (15.5 kgf/cm , 220 psi).
Radiator and condenser fan
high speed circuit
troubleshooting (see page 21-
31)
HVAC DTCs (see page 21-67)
Cleanliness and tightness of all
connectors
Compressor clutch does not
engage. (but both fans run with
the A/C on)
Compressor clutch circuit
troubleshooting (see page 21-
32)
HVAC DTCs (see page 21-67)
Blown fuse No. 59 (7.5A) in the under-
hood fuse/relay box, and No. 3 (7.5A) in
the driver’s under-dash fuse/relay box
Cleanliness and tightness of all
connectors
A/C system does not come on
(both fans and compressor do not
work); heater is OK
A/C pressure switch circuit
troubleshooting (see page 21-
110)
HVAC DTCs (see page 21-67)
Cleanliness and tightness of all
connectors
2
2
2
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*01
S0X4A10G10500000000CAAT00
Climate Control Unit Inputs and Outputs (Without Navigation System)
CONNECTOR A (
on Circuit Diagram)
Cavity
Wire color
Signal
CONNECTOR B (
on Circuit Diagram)
Cavity
Wire color
Signal
21-73
System Description
CLIMATE CONTROL UNIT CONNECTORS
CONNECTOR A (8P)
CONNECTOR B (20P)
1
BLK/YEL
IG2 (Power)
INPUT
2
WHT/YEL
B (Power)
INPUT
3
RED/WHT
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
INPUT
4
BLU/ORN
BLOWER MOTOR HIGH RELAY
INPUT
5
ORN/BLK
POWER TRANSISTOR CONTROL
OUTPUT
6
BLU/RED
BLOWER FEEDBACK
INPUT
7
BRN/YEL
REAR WINDOW DEFOGGER RELAY
OUTPUT
8
BLK
GROUND (G401)
INPUT
1
PNK/BLK
AIR MIX POTENTIAL
INPUT
2
RED/WHT
A/C PRESSURE SWITCH
OUTPUT
3
GRN/RED
FRESH
OUTPUT
4
GRN/WHT
RECIRCULATE
OUTPUT
5
BLU/BLK
MODE DEF
OUTPUT
6
BLU/WHT
MODE VENT
OUTPUT
7
RED/YEL
AIR MIX HOT
OUTPUT
8
RED/BLK
COMBINATION LIGHT SWITCH or TAILLIGHT RELAY
INPUT
9
RED/WHT
AIR MIX COOL
OUTPUT
10
RED
MULTIPLEX CONTROL UNIT (DRIVER’S)
INPUT
11
YEL/GRN
SENSOR COMMON GROUND
OUTPUT
12
WHT/RED
SUNLIGHT SENSOR
INPUT
13
GRY
AIR MIX POTENTIAL
5 V
OUTPUT
14
BRN
EVAPORATOR TEMPERATURE SENSOR
INPUT
15
BRN/WHT
OUTSIDE AIR TEMPERATURE SENSOR
INPUT
16
YEL/RED
IN-CAR TEMPERATURE SENSOR
INPUT
17
BLU/GRN
MODE 4
INPUT
18
LT GRN/BLK
MODE 3
INPUT
19
GRN/YEL
MODE 2
INPUT
20
GRN/BLK
MODE 1
INPUT
(cont’d)
Wire side of female terminals
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*02
Climate Control Unit Inputs and Outputs (With Navigation System)
CONNECTOR A (
on Circuit Diagram)
Cavity
Wire color
Signal
CONNECTOR B (
on Circuit Diagram)
Cavity
Wire color
Signal
21-74
Climate Control
System Description (cont’d)
CLIMATE CONTROL UNIT CONNECTORS
CONNECTOR A (16P)
CONNECTOR B (26P)
1
2
3
WHT/RED
DS0
INPUT
4
WHT/YEL
DS1
INPUT
5
LT BLU
DS2
INPUT
6
WHT/BLK
D2
OUTPUT
7
WHT/BLU
D1
OUTPUT
8
BRN
D0
OUTPUT
9
BLU/ORN
BLOWER MOTOR HIGH RELAY
INPUT
10
BRN/YEL
REAR WINDOW DEFOGGER RELAY
OUTPUT
11
YEL/GRN
LATCH
INPUT
12
YEL/WHT
DATA
INPUT
13
YEL/BLK
CLK1
INPUT
14
GRN/ORN
SI
INPUT
15
YEL/BLU
CLK2
OUTPUT
16
RED/GRN
SO
OUTPUT
1
YEL/GRN
SENSOR COMMON GROUND
OUTPUT
2
GRN/WHT
FL
OUTPUT
3
GRY
AIR MIX POTENTIAL
5 V
OUTPUT
4
RED/WHT
A/C PRESSURE SWITCH
OUTPUT
5
GRN/BLK
MODE 1
INPUT
6
GRN/YEL
MODE 2
INPUT
7
LT GRN/BLK
MODE 3
INPUT
8
BLU/GRN
MODE 4
INPUT
9
10
BLU/WHT
MODE VENT
OUTPUT
11
BLU/BLK
MODE DEF
OUTPUT
12
ORN/BLK
POWER TRANSISTOR CONTROL
OUTPUT
13
BLK/YEL
IG2 (Power)
INPUT
14
BLU/RED
BLOWER FEEDBACK
INPUT
15
BLK
GROUND (G401)
INPUT
16
BLK/WHT
PANEL GROUND
INPUT
17
YEL/RED
IN-CAR TEMPERATURE SENSOR
INPUT
18
BRN/WHT
OUTSIDE AIR TEMPERATURE SENSOR
INPUT
19
WHT/RED
SUNLIGHT SENSOR
INPUT
20
BRN
EVAPORATOR TEMPERATURE SENSOR
INPUT
21
PNK/BLK
AIR MIX POTENTIAL
INPUT
22
RED/WHT
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
INPUT
23
GRN/RED
FRESH
OUTPUT
24
GRN/WHT
RECIRCULATE
OUTPUT
25
RED/YEL
AIR MIX HOT
OUTPUT
26
RED/WHT
AIR MIX COOL
OUTPUT
Wire side of female terminals
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S0X4A100000000J2101ZAAT00
21-75
03/07/29 10:12:09 61S0X050_210_0076
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