Dodge Sprinter 2006 Manual page 859

VA
lit t le lon ger befor e t h e n ext u psh ift . If t h e dr ivin g
st yle is st ill a ggr essive, t h e sh ift poin t is m odified u p
t o t en st eps. If t h e dr ivin g r et u r n s t o n or m a l, t h en
t h e sh ift poin t m odifica t ion a lso r et u r n s t o t h e ba se
posit ion .
Th is a da pt a t ion h a s n o m em or y. Th e a da pt a t ion t o
dr ivin g st yle is n ot h in g m or e t h a n a sh ift poin t m od-
ifica t ion m ea n t t o a ssist a n a ggr essive dr iver. Th e
sh ift poin t s a r e a dju st ed for t h e m om en t a n d r et u r n
t o ba se posit ion a s soon a s t h e in pu t s a r e con t r olled
in a m or e r a t ion a l m a n n er.
Shift Time Adaptation (Shift Overlap Adaptation, Working
Pressure)
Sh ift t im e a da pt a t ion is t h e a bilit y of t h e TCM t o
elect r on ica lly a lt er t h e t im e it t a kes t o go fr om on e
gea r t o a n ot h er. Sh ift t im e is defin ed a s t h e t im e it
t a kes t o disen ga ge on e sh ift m em ber wh ile a n ot h er is
bein g a pplied. Sh ift t im e a da pt a t ion is divided in t o
fou r ca t egor ies:
1. Acceler a t in g u psh ift , wh ich is a n u psh ift u n der
a loa d. F or sh ift t im e a da pt a t ion for t h e 1-2 u psh ift
t o t a ke pla ce, t h e t r a n sm ission m u st sh ift fr om 1st t o
2n d in six differ en t en gin e loa d r a n ges vs. t r a n sm is-
sion ou t pu t speed r a n ges.
2. Deceler a t in g u psh ift , wh ich is a n u psh ift u n der
n o loa d. Th is sh ift is a r ollin g u psh ift a n d is a ccom -
plish ed by let t in g t h e veh icle r oll in t o t h e n ext gea r.
3. Acceler a t in g down sh ift , wh ich is a down sh ift
u n der loa d. Th is sh ift ca n be in it ia t ed by t h e t h r ot t le,
wit h or wit h ou t kickdown . Th e sh ift select or ca n a lso
be u sed.
4. Deceler a t in g down sh ift , wh ich is a ccom plish ed
by coa st in g down . As t h e speed of t h e veh icle
decr ea ses, t h e t r a n sm ission down sh ift s.
Fill Pressure Adaptation (Apply Pressure Adaptation, Modu-
lating Pressure)
F ill pr essu r e a da pt a t ion is t h e a bilit y of t h e TCM
t o m odify t h e pr essu r e u sed t o en ga ge a sh ift m em -
ber. Th e va lu e of t h is pr essu r e det er m in es h ow fir m
t h e sh ift will be.
• If t oo m u ch pr essu r e is u sed, t h e sh ift will be
h a r d.
• If t oo lit t le pr essu r e is u sed, t h e t r a n sm ission
m a y slip.
Th e pr essu r e a dju st m en t is n eeded t o com pen sa t e
for t h e t oler a n ces of t h e sh ift pr essu r e solen oid va lve.
Th e a m ou n t t h e solen oid va lve open s a s well a s h ow
qu ickly t h e va lve ca n m ove, h a s a n effect on t h e pr es-
su r e. Th e r et u r n spr in g for t h e sh ift m em ber pr o-
vides a r esist a n ce t h a t m u st be over com e by t h e
pr essu r e in or der for sh ift m em ber t o a pply. Th ese
r et u r n spr in gs h a ve sligh t ly differ en t va lu es. Th is
a lso a ffect s t h e a pplica t ion pr essu r e a n d is com pen -
sa t ed for by fill pr essu r e a da pt a t ion .
ELECTRONIC CONTROL MODULES 8E - 9
Fill Time Adaptation (Engagement Time Adaptation)
F ill t im e is t h e t im e it t a kes t o fill t h e pist on ca v-
it y a n d t a ke u p a n y clea r a n ces for a fr ict ion elem en t
(clu t ch or br a ke). F ill t im e a da pt a t ion is t h e a bilit y of
t h e TCM t o m odify t h e t im e it t a kes t o fill t h e sh ift
m em ber by a pplyin g a pr eloa d pr essu r e.
CONTROLLER MODES OF OPERA TION
Permanent Limp - In Mode
Wh en t h e TCM det er m in es t h er e is a n on -r ecover-
a ble con dit ion pr esen t t h a t does n ot a llow pr oper
t r a n sm ission oper a t ion , it pla ces t h e t r a n sm ission in
per m a n en t Lim p-In Mode. Wh en t h e con dit ion occu r s
t h e TCM t u r n s off a ll solen oids a s well a s t h e sole-
n oid su pply ou t pu t cir cu it . If t h is occu r s wh ile t h e
veh icle is m ovin g, t h e t r a n sm ission r em a in s in t h e
cu r r en t gea r posit ion u n t il t h e ign it ion is t u r n ed off
or t h e sh ift er is pla ced in t h e "P " posit ion . Wh en t h e
sh ift er h a s been pla ced in "P," t h e t r a n sm ission on ly
a llows 2n d gea r oper a t ion . If t h is occu r s wh ile t h e
veh icle is n ot m ovin g, t h e t r a n sm ission on ly a llows
oper a t ion in 2n d gea r.
Temporary Limp - In Mode
Th is m ode is t h e sa m e a s t h e per m a n en t Lim p-In
Mode except if t h e con dit ion is n o lon ger pr esen t , t h e
syst em r esu m es n or m a l oper a t ion .
Under Voltage Limp - In Mode
Wh en t h e TCM det ect s t h a t syst em volt a ge h a s
dr opped below 8.5 volt s, it disa bles volt a ge-depen -
da n t dia gn ost ics a n d pla ces t h e t r a n sm ission in t h e
t em por a r y Lim p-In Mode. Wh en t h e TCM sen ses
t h a t t h e volt a ge h a s r isen a bove 9.0 volt s, n or m a l
t r a n sm ission oper a t ion is r esu m ed.
Hardware Error Mode
Wh en t h e TCM det ect s a m a jor in t er n a l er r or, t h e
t r a n sm ission is pla ced in t h e per m a n en t Lim p-In
Mode a n d cea ses a ll com m u n ica t ion over t h e CAN
bu s. Wh en t h e TCM h a s en t er ed t h is m ode n or m a l
t r a n sm ission oper a t ion does n ot r esu m e u n t il a ll
DTCs a r e clea r ed fr om t h e TCM.
Loss of Drive
If t h e TCM det ect s a sit u a t ion t h a t h a s r esu lt ed or
m a y r esu lt in a ca t a st r oph ic en gin e or t r a n sm ission
pr oblem , t h e t r a n sm ission is pla ced in t h e n eu t r a l
posit ion . Im pr oper Ra t io, In pu t Sen sor Over speed or
E n gin e Over speed DTCs ca u se t h e loss of dr ive.
Controlled Limp - in Mode
Wh en a fa ilu r e does n ot r equ ir e t h e TCM t o sh u t
down t h e solen oid su pply, bu t t h e fa ilu r e is sever e
en ou gh t h a t t h e TCM pla ces t h e t r a n sm ission in t o a