Honda 2004 Odyssey, Service Manual

Page: 1603 / 2459

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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
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