Mode Control Motor - Honda Civic Service Manual

Mode Control Motor Test
Disconnect the 10P connector from the mode
control motor.
Connect battery power to the No. 1 terminal of the
mode control motor, and ground the No. 2
terminal; the mode control motor should run
smoothly and stop at Defrost. lf it doesn't, reverse
the connections; the mode control motor should
run smoothly and stop at Vent. When the mode
control motor stops running, disconnect battery
power immediately.
' 1 .
4 .
MODE CONTROL MOTOR
3. lfthe mode control motor does not run in step 2,
remove it, then check the mode control linkage and
doors for smooth movement.
. lf the linkage and doors move smoothly. replace
the mode control motor.
. l f t h e l i n k a g e o r d o o r s s t i c k o r b i n d , r e p a i r t h e m
as neeoeo.
. lfthe mode control motor runs smoothly, go to
step 4.
Use a digital multimeter with an output of 1 mA or
less at the 20 k Q range. With the mode control
motor running as in step 2, check for continuity
b e t w e e n t h e N o . 4 , 5 , 6 , 7 , 8 , a n d 9 t e r m i n a l s a n d
t h e N o . 1 0 t e r m i n a l i n d i v i d u a l l y . T h e r e s h o u l d b e
c o n t i n u i t y f o r a m o m e n t a t e a c h t e r m i n a l a s t h e
motor moves past each mode position.
lf there is no continuity for a moment at each
terminal. replace the mode control motor.
Mode Control Motor Replacement
2.
3 .
1 . R e m o v e t h e E C M ( s e e p a g e 1 1 - 4 ) .
Remove the relay mount bracket bolt, and move
the relays out of the way.
Disconnect the 10P connector {A) from the mode
control motor (B). Remove the self-tapping screws
and the mode control motor from the heater unit.
lnstallthe motor in the reverse order of removal.
lvlake sure the pin on the linkage is properly
engaged with the motor. After installation. make
sure the motor runs smoothly.
4 .
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