Chrysler Sebring 2005 Service Manual page 2994

H EAT I N G & A/C
*B LOWER MOTOR IN OP ERATIVE - ATC —
TES T
14 Tu r n t h e ign it ion off.
Recon n ect a ll pr eviou sly discon n ect ed com pon en t s.
Con n ect t h e DRBIII Scope In pu t Ca ble CH 7058, Ca ble-To-P r obe Ada pt er CH 7062,
a n d t h e Red (+) a n d Bla ck (-) X1 Test Lea ds CH 7030 t o t h e DRBIII .
Select t h e followin g fr om t h e DRBIII m en u : P E P Modu le Tools; La b Scope; Live
Da t a ; a n d La b Scope.
Set t h e t im e t o 0.4m s/Div.
Set t h e volt a ge r a n ge t o +20.0v.
Set t h e Offset t o 4.00v.
Set t h e P r obe t o X1.
St a r t t h e en gin e.
Tu r n Au t om a t ic Tem per a t u r e Con t r ol on .
Usin g t h e Red (+) X1 Test Lea d, ba ck pr obe t h e Blower Mot or Con t r ol cir cu it in t h e
Blower P ower Modu le C1 h a r n ess con n ect or.
Con n ect t h e Bla ck (-) X1 Test Lea d t o gr ou n d.
N OTE: Ov e r th e B lo w e r Mo to r Co n tro l c irc u it, th e B lo w e r P o w e r Mo d u le
p ro v id e s a ba tte ry s u p p ly v o lta g e s ig n a l to th e B o d y Co n tro l Mo d u le (B CM)
w h ile th e B CM p ro v id e s a v a ria ble d u ty c y c le g ro u n d ba s e d o n in p u t fro m
th e blo w e r c o n tro l s w itc h .
N OTE: Wh e n th e blo w e r c o n tro l s w itc h is s e t to Lo s p e e d , th e B CM p ro v id e s
a s h o rt d u ty c y c le (le s s tim e g ro u n d in g th e s ig n a l). As h ig h e r blo w e r s p e e d s
a re re qu e s te d , th e B CM in c re a s e s th e d u ty c y c le (m o re tim e g ro u n d in g th e
s ig n a l).
N OTE: Wh e n th e blo w e r c o n tro l s w itc h is s e t to Hig h s p e e d , th e d u ty c y c le
in c re a s e s to w h e re th e s ig n a l p a tte rn is a fla t lin e o n g ro u n d .
Set t h e blower con t r ol t o LO speed a n d t h en slowly t u r n it t o H I speed wh ile
obser vin g t h e DRBIII displa y.
Th e du t y cycle pa t t er n sh ou ld ch a n ge sm oot h ly a s t h e blower swit ch is t u r n ed fr om
Lo t o H igh . Th e h igh pa r t of t h e cycle will decr ea se a s t h e blower speed in cr ea ses.
Does t h e DRBIII displa y t h e sign a l a s descr ibed a bove?
Yes
No
15 Tu r n t h e ign it ion off.
Discon n ect t h e Blower P ower Modu le C1 h a r n ess con n ect or.
Discon n ect t h e Blower P ower Modu le C2 h a r n ess con n ect or.
Con n ect a ju m per wir e bet ween t h e F u sed Ign it ion Swit ch Ou t pu t cir cu it in t h e
Blower P ower Modu le C1 h a r n ess con n ect or a n d t h e Blower Mot or Su pply cir cu it in
t h e Blower P ower Modu le C2 h a r n ess con n ect or.
Con n ect a ju m per wir e bet ween t h e Gr ou n d cir cu it in t h e Blower P ower Modu le C1
h a r n ess con n ect or a n d t h e Blower Mot or Gr ou n d cir cu it in t h e Blower P ower Modu le
C2 h a r n ess con n ect or.
Tu r n t h e ign it ion on .
Does t h e Blower Mot or oper a t e a t fu ll speed?
Yes
No
ACTION
→ Go To 15
→ Repla ce a n d pr ogr a m t h e Body Con t r ol Modu le in a ccor da n ce
wit h t h e Ser vice In for m a t ion .
P er for m BODY VE RIF ICATION TE ST - VE R 1.
→ Repla ce t h e Blower P ower Modu le in a ccor da n ce wit h t h e Ser vice
In for m a t ion .
P er for m BODY VE RIF ICATION TE ST - VE R 1.
→ Repla ce t h e Blower Mot or in a ccor da n ce wit h t h e Ser vice In for-
m a t ion .
P er for m BODY VE RIF ICATION TE ST - VE R 1.
Co n tin u e d
332
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