Dodge Sprinter 2006 Manual page 858

8E - 8 ELECTRONIC CONTROL MODULES
N2 and N3 Speed Sensors
Th e N2 a n d N3 In pu t Speed Sen sor s a r e t wo H a ll-
effect speed sen sor s t h a t a r e m ou n t ed in t er n a lly in
t h e t r a n sm ission a n d a r e u sed by t h e TCM t o ca lcu -
la t e t h e t r a n sm ission 's in pu t speed. Sin ce t h e in pu t
speed ca n n ot be m ea su r ed dir ect ly, t wo of t h e dr ive
elem en t s a r e m ea su r ed. Two in pu t speed sen sor s
wer e r equ ir ed beca u se bot h dr ive elem en t s a r e n ot
a ct ive in a ll gea r s.
CAN C Bus Indirect Input Signals
A 2.5-volt bia s (oper a t in g volt a ge) is pr esen t on t h e
CAN C bu s a n y t im e t h e ign it ion swit ch is in t h e
RUN posit ion . Bot h t h e TCM a n d t h e ABS a pply t h is
bia s. On t h is veh icle, t h e CAN C bu s is u sed for m od-
u le da t a exch a n ge on ly. Th e in dir ect in pu t s u sed on
t h e NAG1 elect r on ic con t r ol syst em a r e:
• Wh eel Speed Sen sor s.
• Br a ke Swit ch .
• E n gin e RP M.
• E n gin e Tem per a t u r e.
• Cr u ise Con t r ol St a t u s.
• Gea r Lim it Requ est .
• Th r ot t le P osit ion - 0% a t idle, 100% a t WOT. If
open , TCM a ssu m es idle (0% t h r ot t le open in g).
• Odom et er Milea ge
• Ma xim u m E ffect ive Tor qu e.
• E n gin e in Lim p-In Mode/Milea ge Wh er e DTC
Wa s Set .
BRAKE TRANSMISSION SHIFT INTERLOCK (BTSI)
Th e BTSI solen oid pr even t s sh ift in g ou t of t h e
PARK posit ion u n t il t h e ign it ion key is in t h e RUN
posit ion a n d t h e br a ke peda l is pr essed. Th e TCM
con t r ols t h e gr ou n d wh ile t h e ign it ion swit ch su pplies
power t o t h e BTSI solen oid. Th e P CM m on it or s t h e
br a ke swit ch a n d br oa dca st s br a ke swit ch st a t u s
m essa ges over t h e CAN C bu s. If t h e pa r k br a ke is
depr essed a n d t h er e is power (Ru n /St a r t ) t o SLA, t h e
BTSI solen oid dea ct iva t es.
SHIFT SCHEDULES
Th e ba sic sh ift sch edu le in clu des u p a n d down -
sh ift s for a ll five gea r s. Th e TCM a da pt s t h e sh ift
pr ogr a m a ccor din g t o dr ivin g st yle, a cceler a t or peda l
posit ion a n d devia t ion of veh icle speed. In flu en cin g
fa ct or s a r e:
• Roa d Con dit ion s.
• In clin e, Declin e a n d Alt it u de.
• Tr a iler Oper a t ion , Loa din g.
• E n gin e Coola n t Tem per a t u r e.
• Cr u ise Con t r ol Oper a t ion .
• Spor t y Dr ivin g St yle.
• Low a n d H igh ATF Tem per a t u r e.
Upshift 1-2
To:
Activat- 1-2/4-5
ed By
Sole-
noid:
Shift 17.8
Point km/h
(at (11.6
35.2% mph)
of throt-
tle)
Down- 5-4
shift
From:
Activat- 1-2/4-5
ed By
Sole-
noid:
Shift 55.7
Point km/h
(34.61
mph)
DOWNSHIFT SAFETY
Select or lever down sh ift s a r e n ot per for m ed if in a d-
m issible h igh en gin e r pm is sen sed.
ADAPTA TION
To equ a lize t oler a n ces a n d wea r, a n a u t om a t ic
a da pt a t ion t a kes pla ce for :
• Sh ift Tim e.
• Clu t ch F illin g Tim e.
• Clu t ch F illin g P r essu r e.
• Tor qu e Con ver t er Lock-Up Con t r ol.
Ada pt a t ion da t a m a y be st or ed per m a n en t ly a n d t o
som e ext en t , ca n be dia gn osed.
Driving Style Adaptation
Th e sh ift poin t is m odified in st eps ba sed on t h e
in for m a t ion fr om t h e in pu t s. Th e con t r ol m odu le
looks a t in pu t s su ch a s:
• veh icle a cceler a t ion a n d deceler a t ion (ca lcu la t ed
by t h e TCM).
• r a t e of ch a n ge a s well a s t h e posit ion of t h e
t h r ot t le peda l (fu el in ject ion in for m a t ion fr om t h e
E CM).
• la t er a l a cceler a t ion (ca lcu la t ed by t h e TCM).
• gea r ch a n ge fr equ en cy (h ow oft en t h e sh ift
occu r s).
Ba sed on h ow a ggr essive t h e dr iver is, t h e TCM
m oves u p t h e sh ift so t h a t t h e pr esen t gea r is h eld a
2-3 3-4
2-3 3-4 1-2/4-5
32.1 67.5
km/h km/h
(19.95 (41.94 (45.86
mph) mph)
4-3 3-2
3-4 2-3 1-2/4-5
40.5 24.4
km/h km/h
(25.17 (15.16
mph) mph)
VA
4-5
73.8
km/h
mph)
2-1
15.1
km/h
(9.38
mph)