Power Transistor Test - Honda Civic Service Manual

Heating and Air Gonditioning
a
\
Power Transistor Test
1. Disconnect the 4P connector from the power
Iranslslor.
2, Measure the resistance between the No. 1 and
No. 2 terminals of the power transistor. lt should be
a b o u t
' 1 . 4
1 . 5 k Q .
. lf the resistance iswithln the specifications, go to
step 3.
. lf the resistance is notwithin the specifications,
replace the power transistor.
POWER TRANSISTOB
C a r e f u l l y r e l e a s e t h e l o c k t a b o n t h e N o . 4 t e r m i n a l
(BLUI/EL) (A) in the 4P connector, then remove the
t e r m i n a l a n d i n s u l a t e i t f r o m b o d y g r o u n d .
(To 12 V power source on vehicle)
Reconnect the 4P connector to the power transistor.
S u p p l y 1 2 v o l t s t o t h e N o . 4 c a v i t y w i t h a j u m p e r
w i r e .
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 ) , a n d c h e c k t h a t t h e
b l o w e r m o t o r r u n s .
. lf the blower motor does not run, replace the
power rranstsror.
. l f t h e b l o w e r m o t o r r u n s , t h e p o w e r t r a n s i s t o r i s
oK.
1 2 V p o w e r s o u r c e o n v e h i c l e )
21-38
1 .
Heater Control Panel and Push
Switch Assembly Removal and
Installation
Remove the center panel (see page 20-62).
Remove the dials (A), then remove the self-tapping
screws and the heater control panel (B)from the
center panel (Cl. Remove the self-tapping screws
and the push switch assembly (D)from the center
p a n e l .
lnstall the control panel and push switch assembly
in the reverse order of removal. After installation,
operate the control panel controls to see whether it
worKs propeny.
Run the self-diagnosis function to confirm that
there are no problems in the system (see page 21-
8 ) .
3 .
4 .