Honda Civic Service Manual page 773

21-2
z t-'5
z t - o
z t - o
21-8
21-9
21-10
21-11
21-14
z t - t o
HVAC (Heating, Ventilation, and Air Gonditioningl
Heating and Air Conditioning
S p e c i a l T o o l s
Comoonent Location lndex ........
A/C Service Tios and
Precautions
A,/C Refrigerant Oil
ReDlacement
General Troubleshooting
lnformation
DTC Troubleshooting Index .......
Symptom Troubleshooting
1 n d e x . . . . . . . . . . . . . .
System Description .....................
Circuit Diagram
D T C T r o u b l e s h o o t i n g . . . . . . . . . . . . . . . . . .
Recirculation Control Motor
CircuitTroubleshooting
.......... 21-25
Heater Control Power and Ground
Circuits Troubleshooting ........ 21-27
Condenser Fan Circuit
Troubleshooting ...................... 21-28
Radiator and Condenser Fans
Common Circuit
Troubfeshooting ...................... 21-29
Compressor Clutch Circuit
T r o u b l e s h o o t i n g . . . . . . . . . . . . . . . . . . . . . . 2 1 - 3 0
A,/C Pressure Switch Circuit
Troubleshooting ...................... 21-32
Air Mix Control Motor
Test and Reolacement ............. 21-34
Mode Control Motor
Test and Replacement ............. 21-35
Recirculation Control Motor
Test and Reolacement ............. 21-36
Evaporator Temperature Sensor
Reolacement and Test ............. 21-31
Power Transistor Test .................
21 -38
Heater Control Panel and
Push Switch Assemblv
Removal and Installation ........ 21-38
Dust and Pollen Filter
R e o l a c e m e n t . . 2 1 - 3 9
Blower Unit Removal and
lnstallation
...... 21-39
Blower Unit Comoonents
R e D l a c e m e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 - 4 1
Evaporator Core
R e o l a c e m e n t
. . 2 1 - 4 2
*Heater Unit/Core
R e D l a c e m e n t
. . 2 1 - 4 3
Heater Valve Cable
A d j u s t m e n t . . . . . 2 1 - 4 6
CompressorReplacement
.......... 21-47
Comoressor Clutch Check .......... 21-48
Comoressor Clutch Overhaul ..... 21-49
Compressor Thermal Protector
R e o 1 a c e m e n t
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 - 5 1
Comoressor Relief Valve
R e o l a c e m e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 - 5 1
Condenser Reolacement ............ 21-52
Refrigerant Recovery .................. 21-53
System Evacuation ...................... 21-54
System CharginS .........................
21-55
Refrigerant LeakTest .................. 21-56
A,/C Svstem Tests ........................
21-57