Honda Civic Service Manual page 782

Heating and Air Conditioning
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Svmptom
Diagnostic procedure
Also check for
Recirculation control doors do not
change between Fresh and Recirculate
Recirculation Control Motor
Circuit Troubleshooting (see page
21 251
C l e a n l i n e s s a n d t i g h t n e s s o f a l l
connectors
Both heater and Ay'C do not work
Heater Control Power and Ground
Circuits Troubleshooting (see
page 21-27)
B l o w n f u s e N o . ' 1 4 ( 1 0 A ) i n t h e
under-dash fuse/relay box
Poor ground at G501
C l e a n l i n e s s a n d t i g h t n e s s o f a l l
conneclors
Condenser fan does not run at all (but
radiator fan runs with the Ay'C on)
C o n d e n s e r F a n C i r c u i t
Troubleshooting {see page 21-28)
. P o o r g r o u n d a t G 3 0 1
. C l e a n l i n e s s a n d t i g h t n e s s o f a l l
connectors
Both fans do not run with the A,/C on
R a d i a t o r a n d C o n d e n s e r F a n s
Common Circuit Troubleshooting
( s e e p a g e 2 1 - 2 9 )
B l o w n f u s e N o . 1 ( 2 0 A ) a n d N o . 4
(20A) in the under-hood fuse/relay
box
P o o r g r o u n d a t G 3 0 l
C l e a n l i n e s s a n d t i g h t n e s s o f a l l
connectors
Compressor clutch does not engage
(both fans run with A,/C on)
Compressor Clutch Circuit
T r o u b l e s h o o t i n q ( s e e D a q e 2 1 - 3 0 )
C l e a n l i n e s s a n d t i g h t n e s s o f a l l
connectors
A/C system does not come on (both
fans and compressor)
Ay'C Pressure Switch Circuit
T r o u b l e s h o o t i n g ( s e e p a g e 2 1 - 3 2 )
B l o w n f u s e N o . 1 ( 2 0 A ) a n d N o . 4
(20A) in the under-hood fuse/relay
box
Poor ground at G301
C l e a n l i n e s s a n d t i g h t n e s s o f a l l
connectors
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Symptom Troubleshooting Index
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21-10
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