Honda 2004 Odyssey Service Manual page 1603

Climate Control
Symptom Troubleshooting Index
Symptom
The blower motor does not run
immediately even through the
engine is fully warmed up.
Recirculation control doors do not
change between Fresh and
Recirculate.
Blower, heater controls, and A/C
do not work.
The climate control panel display
does not work.
The manual switch (With
navigation system) does not work.
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).
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
2
kgf/cm , 220 psi) with the A/C on.
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).
Compressor clutch does not
engage. (but both fans run with
the A/C on)
A/C system does not come on
(both fans and compressor do not
work); heater is OK
21-72
Diagnostic procedure
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)
Recircuration control motor
circuit troubleshooting (see
page 21-107)
Climate control power and
ground circuit troubleshooting
(see page 21-112)
Climate control panel
troubleshooting (see page 21-
114)
Manual switch (With navigation
system) troubleshooting (see
page 21-116)
Radiator and condenser fan low
speed circuit troubleshooting
(see page 21-27)
2
Condenser fan high speed
circuit troubleshooting (see
page 21-30)
Radiator and condenser fan
high speed circuit
troubleshooting (see page 21-
2
31)
Compressor clutch circuit
troubleshooting (see page 21-
32)
A/C pressure switch circuit
troubleshooting (see page 21-
110)
Also check for
• Cleanliness and tightness of all
connectors
• 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
• 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
• HVAC DTCs (see page 21-67)
• Cleanliness and tightness of all
connectors
• HVAC DTCs (see page 21-67)
• Cleanliness and tightness of all
connectors
• 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
• 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
• HVAC DTCs (see page 21-67)
• Cleanliness and tightness of all
connectors
• 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
• HVAC DTCs (see page 21-67)
• Cleanliness and tightness of all
connectors