## HVAC (Heating, Ventilation, and Air Conditioning)

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Heating

System Description | 21-2
Circuit Diagram | 21-3

Air Conditioning

Component Location Index | 21-5
A/C Service Tips and Precautions | 21-7
A/C Refrigerant Oil Replacement | 21-7
Symptom Troubleshooting Index | 21-9
System Description | 21-10
Circuit Diagram | 21-11
Radiator and Condenser Fans Low Speed Circuit Troubleshooting | 21-13
Condenser Fan High Speed Circuit Troubleshooting | 21-16
Radiator and Condenser Fans High Speed Circuit Troubleshooting | 21-17
Compressor Clutch Circuit Troubleshooting | 21-18
A/C Pressure Switch Circuit Troubleshooting | 21-20
Compressor Replacement | 21-25
Compressor Clutch Check | 21-26
Compressor Clutch Overhaul | 21-27
Compressor Relief Valve Replacement | 21-28
Condenser Replacement | 21-29
A/C System Tests | 21-30

Climate Control

Symptom Troubleshooting Index | 21-32
System Description | 21-33
Circuit Diagram | 21-34
A/C Pressure Switch Circuit Troubleshooting | 21-36

NOTE: Refer to the 2001 Civic Shop Manual P/N 62S5A00, on this CD for items not shown in this section.

Outline of Model Changes

The Turbo Diesel model has been added; related information is included.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) (If HVAC maintenance is required)

This model has an SRS which 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, seat belt buckle tensioners in the front seat belt buckles, and side airbags in the front seat-backs. Information necessary to safely service the SRS is included in the '01 Civic Shop Manual on this CD, P/N 62S5A00. Items marked with an asterisk (*) on the contents page include or are located near SRS components. Servicing, disassembling or replacing these items will require special precautions and tools, and should be done only by an authorised Honda dealer.

- 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 authorised 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 when the ignition switch is ON (II).
- SRS electrical wiring connectors are identified by yellow colour 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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