Air Mix Control Motor - Honda Civic Service Manual

Heating and Air Conditioning
Air Mix Control Motor Test
1. Disconnect the 5P connector from the air mix
control motor.
2. Connect battery powertothe No. l terminal ofthe
air mix control motor, and ground the No. 2
t e r m i n a l ; t h e a i r m i x c o n t r o l m o t o r s h o u l d r u n , a n d
stop at Max Cool. lf it doesn't, reverse the
connections;the air mix control motor should run,
and stop at Max Hot. lf the air mix control motor
does not run, remove it. then check the air mix
control linkage and door for smooth movement.
. lf the linkage and door move smoothly, replace
the air mix control motor.
. l f t h e l i n k a g e o r d o o r s t i c k o r b i n d , r e p a i r t h e m a s
needed.
. lf the air mix control motor runs smoothly, go to
step 3.
AIR MIX CONTROL MOTOR
3 .
4 .
Measure the resistance between the No. 4 and
No. 5 terminals. lt should be between 2.1 k to
3 . 9 k Q .
Reconnect the air mix control motor 5P connector,
t h e n t u r n t h e i g n i t i o n s w i t c h O N { l l ) .
Using the Backprobe Set, measure the voltage
between the No. 3 and No. 4 terminals.
Max Cool about 1V
Max Hot about 4 V
lf either the resistance or voltage readings are not
as specified, replace the air mix cotrol motor.
21-34
Air Mix Control Motor Replacement
1 . Remove the under-dash fuse/relay box (see page
22-491.
Disconnect the 5P connector {A) from the air mix
control motor (B). Remove the self-tapping screws
and the air mix control motor from the heater unit.
R e m o v e t h e r o d ( C ) f r o m t h e a r m ( D ) o f t h e a i r m i x
controi motor.
Install the motor in the reverse order of removal.
After installation, make sure the motor runs
smoothly.
3 .
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