Honda Odyssey 2004. Manual — part 381
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) (If HVAC maintenance is required)
• To avoid rendering the SRS inoperative, which could lead to personal injury or death in the event of a severe frontal
collision, all SRS service work must be performed by an authorized Honda dealer.
• Improper service procedures, including incorrect removal and installation of the SRS, could lead to personal injury
caused by unintentional deployment of the airbags and/or side airbags.
• Do not bump the SRS unit. Otherwise, the system may fail in a collision, or airbags may deploy if the ignition switch
is ON (II).
• SRS electrical connectors are identified by yellow color coding. Related components are located in the steering
column, front console, dashboard, dashboard lower panel, in the dashboard above the glove box, in the front seats,
and around the floor. Do not use electrical test equipment on these circuits.
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The Odyssey SRS includes a driver’s airbag in the steering wheel hub, a passenger’s airbag in the dashboard above
the glove box, seat belt tensioners in the front seat belt retractors, and side airbags in the front seat-backs. Information
special precautions and tools, and should be done only by an authorized Honda dealer.
necessary to safely service the SRS is included in this Service Manual. Items marked with an asterisk ( * ) on the
contents page include or are located near SRS components. Servicing, disassembling, or replacing these items requires
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Heating/Air Conditioning
Climate Control
Rear Heater-A/C
HVAC (Heating, Ventilation, and Air Conditioning)
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Special Tools
. 21-2
Component Location Index
. 21-3
A/C Service Tips and Precautions
. 21-6
A/C Refrigerant Oil Replacement
. 21-6
General Troubleshooting Infomation
. 21-8
DTC Troubleshooting Index
. 21-9
Symptom Troubleshooting Index
. 21-10
System Description
. 21-11
Circuit Diagram
. 21-14
DTC Troubleshooting
. 21-16
Recirculation Control Motor Circuit
Troubleshooting
. 21-21
Blower Motor Circuit Troubleshooting
. 21-22
Heater Control Power and Ground Circuit
Troubleshooting
. 21-26
Radiator and Condenser Fan Low Speed
Circuit Troubleshooting
. 21-27
Condenser Fan High Speed Circuit
Troubleshooting
. 21-30
Radiator and Condenser Fan High Speed
Circuit Troubleshooting
. 21-31
Compressor Clutch Circuit
Troubleshooting
. 21-32
A/C Pressure Switch Circuit
Troubleshooting
. 21-35
Air Mix Control Motor Test
. 21-37
Air Mix Control Motor Replacement
. 21-37
Mode Control Motor Test
. 21-38
Mode Control Motor Replacement
. 21-38
Recirculation Control Motor Test
. 21-39
Recirculation Control Motor
Replacement
. 21-39
Evaporator Temperature Sensor Test
. 21-40
Heater Fan Switch Test
. 21-40
Heater Control Panel
Removal and Installation
. 21-41
Heater Control Panel
Disassembly and Reassembly
. 21-41
Evaporator Removal and Installation
. 21-42
Evaporator Component Replacement
. 21-43
Dust and Pollen Filter Replacement
. 21-44
Blower Unit Removal and Installation
. 21-45
Blower Unit Component Replacement
. 21-45
Heater Unit/Core Replacement
. 21-46
Heater Valve Cable Adjustment
. 21-48
Compressor Replacement
. 21-49
Compressor Clutch Check
. 21-51
Compressor Clutch Overhaul
. 21-52
Compressor Relief Valve Replacement
. 21-53
Condenser Replacement
. 21-54
Receiver/Dryer Desiccant Replacement
. 21-55
Refrigerant Recovery
. 21-56
System Evacuation
. 21-57
System Charging
. 21-58
Refrigerant Leak Test
. 21-59
A/C System Test
. 21-60
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Component Location Index
. 21-64
General Troubleshooting Infomation
. 21-67
DTC Troubleshooting Index
. 21-71
Symptom Troubleshooting Index
. 21-72
System Description
. 21-73
Circuit Diagram
. 21-76
DTC Troubleshooting
. 21-80
ECT Sensor Circuit Troubleshooting
. 21-106
Recirculation Control Motor Circuit
Troubleshooting
. 21-107
A/C Pressure Switch Circuit
Troubleshooting
. 21-110
Climate Control Power and Ground
Circuit Troubleshooting
. 21-112
Climate Control Panel Troubleshooting
(With Navigation System)
. 21-114
Manual Switch (Navigation System Display)
Troubleshooting
. 21-116
In-car Temperature Sensor Test
. 21-117
In-car Temperature Sensor Replacement
. 21-117
Outside Air Temperature Sensor Test
. 21-118
Outside Air Temperature Sensor
Replacement
. 21-118
Sunlight SensorTest
. 21-119
Sunlight Sensor Replacement
. 21-119
Power Transistor Test
. 21-120
Climate Control Unit
Removal and Installation
(Without Navigation Sytem)
. 21-120
Climate Control Panel
Removal and Installation
(With Navigation System)
. 21-121
Climate Control Unit
Disassembly and Reassembly
(Without Navigation System)
. 21-121
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Component Location Index
. 21-122
Symptom Troubleshooting Index
. 21-123
Circuit Diagram
. 21-124
Rear Blower Motor Circuit
Troubleshooting
. 21-125
Rear Blower Motor Low Speed Circuit
Troubleshooting
. 21-127
Rear Blower Motor Middle Speed Circuit
Troubleshooting
. 21-129
Rear Blower Motor High Speed Circuit
Troubleshooting Hot and/or Cold
. 21-131
Rear Mode Control Motor Circuit
Troubleshooting
. 21-134
Rear Mode Control Motor Test
. 21-139
Rear Mode Control Motor Replacement
. 21-139
Rear Heater-A/C Main Switch
Removal and Installation
. 21-140
Rear Heater-A/C Main Switch Test
. 21-140
Rear Heater-A/C Passenger’s Control Panel
Removal and Installation
. 21-141
Rear Heater-A/C Passenger’s
Control Panel Test
. 21-141
Rear Blower Unit
Removal and Installation
. 21-142
Rear Blower Unit Component
Replacement
. 21-142
Rear Evaporator-Heater Unit
Removal and Installation
. 21-143
Rear Evaporator-Heater Unit Component
Replacement
. 21-144
Rear A/C Line Replacement
. 21-145
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01
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Ref.No.
Tool Number
Description
Qty
21-2
HVAC (Heating, Ventilation, and Air Conditioning)
Special Tools
07SAZ-001000A
Backprobe Set
2
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21-3
Heating/Air Conditioning
Component Location Index
EVAPORATOR
SERVICE VALVE
(HIGH-PRESSURE SIDE)
COMPRESSOR
RECEIVER/DRYER
CONDENSER
EVAPORATOR COMPONENTS
SERVICE VALVE
(LOW-PRESSURE SIDE)
(cont’d)
Removal and Installation, page 21-42
Replacement, page 21-49
Clutch Check, page 21-51
Clutch Overhaul, page 21-52
Relief Valve Replacement, page 21-53
Desiccant Replacement,
page 21-55
(With built-in receiver/dryer)
Replacement, page 21-54
Replacement, page 21-43
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