Dodge Sprinter 2006 Manual page 2162

GEN ERAL I N FORM AT I ON
Th e NAG1 will defa u lt in t h e cu r r en t gea r posit ion
if a DTC is det ect ed, t h en a ft er a key cycle or sh ift
t o pa r k t h e t r a n sm ission will go in t o Lim p-in , wh ich
is m ech a n ica l 2n d gea r. Som e DTC's m a y a llow t h e
t r a n sm ission t o r esu m e n or m a l oper a t ion (r ecover )
if t h e det ect ed pr oblem goes a wa y. P er m a n en t
lim p-in DTC will r ecover wh en t h e key is cycled, bu t
if t h e sa m e DTC is det ect ed for t h r ee key cycles t h e
syst em will n ot r ecover a n d t h e DTC m u st be
clea r ed fr om t h e TCM wit h t h e DRBIII sca n t ool.
On ce t h e DRBIII is in t h e Tr a n sm ission por t ion
of t h e dia gn ost ic pr ogr a m , it con st a n t ly m on it or s
t h e TCM t o see if t h e syst em is in lim p-in m ode. If
t h e t r a n sm ission is in lim p-in m ode, t h e DRBIII
will fla sh t h e r ed LE D.
3.2.1 CONTROLLER MODES OF
OPERA TION
P e rm a n e n t lim p -in m o d e
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 will n ot a llow
pr oper t r a n sm ission oper a t ion , it will pla ce t h e
t r a n sm ission in per m a n en t lim p-in m ode. Wh en t h e
con dit ion occu r s t h e TCM will t u r n off a ll solen oids
a s well a s t h e solen 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
will r em a in in t h e cu r r en t gea r u n t il t h e ign it ion is
t u r n ed off or sh ift er is pla ced in t h e P posit ion .
On ce t h e sh ift er h a s been pla ced in P t h e Tr a n s-
m ission will on ly a llow 2n d gea r oper a t ion . If t h e
pr oblem 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 will on ly a llow 2n d gea r oper a t ion .
Te m p o ra ry lim p -in m o d e
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
m ode except if t h e con dit ion is n o lon ger pr esen t t h e
syst em will r esu m e n or m a l oper a t ion . (Recover a ble
DTC)
U n d e rv o lta g e lim p -in m o d e
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 will disa ble volt a ge de-
pen da n t dia gn ost ics a n d pla ce t h e t r a n sm ission in
t h e t em por a r y lim p-in m ode. 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 will be r esu m ed.
Ha rd w a re Erro r Mo d e
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 will be pla ced in t h e per m a n en t
lim p-in m ode a n d cea se a ll com m u n ica t ion over t h e
CAN bu s. On ce 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 will n ot r esu m e u n -
t il a ll DTC's a r e clea r ed fr om t h e TCM.
Lo s s o f D riv e
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 en gin e or t r a n sm ission fa ilu r e, t h e
t r a n sm ission will be 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 DTC's will ca u se t h e loss of dr ive.
Co n tro lle d Lim p -in Mo d e
Wh en a fa ilu r e con dit ion 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
of a degr ee wh er e t h e TCM will pla ce t h e t r a n sm is-
sion in t o a pr edefin ed gea r, t h er e will be sever a l
sh ift per for m a n ce issu es. E xa m ples of t h is a r e, wit h
t h e t r a n sm ission slippin g t h e con t r oller will a t -
t em pt t o pla ce t h e t r a n sm ission in t o t h ir d gea r a n d
m a in t a in t h ir d gea r for a ll for wa r d dr ive con dit ion s.
An ot h er exa m ple is som e of t h e CAN bu s m essa ge
issu es if t h e TCM does n ot r eceive r equ ir ed in for-
m a t ion fr om t h e E n gin e Con t r oller, t h en defa u lt
va lu es a r e u sed wh ich m a y r esu lt in poor t r a n sm is-
sion sh ift per for m a n ce.
3.2.2 MIL ILLUMINA TION
F or fa ilu r es det ect ed by t h e Tr a n sm ission Con -
t r oller t h a t r esu lt in t h e con t r oller pla cin g t h e
t r a n sm ission in t o a lim p-in m ode, except for Syst em
Over volt a ge a n d Syst em Un der volt a ge DTCs, t h e
MIL will be illu m in a t ed. Th e Tr a n sm ission Con t r ol
Modu le will in for m t h e E CM over t h e CAN bu s t h a t
a fa ilu r e h a s occu r r ed. Th e E CM will illu m in a t e t h e
MIL. If t h e con dit ion is r em oved a n d t h e fa ilu r e
becom es St or ed (In t er m it t en t ), t h e Tr a n sm ission
con t r oller will st op r epor t in g t h a t t h e DTC is a ct ive
a n d t h e E CM will ext in gu ish t h e MIL.
NOTE: The MIL will light when the problem is
first detected and it will not go off until the
next ignition cycle,
conditions have been checked for their
presence. This
minutes of driving.
3.2.3 SOLENOIDS
1-2/4-5 s o le n o id - Th e 1-2/4-5 solen oid is a ct iva t ed
wh en t h e TCM det er m in es t h a t t h e t r a n sm ission
m u st sh ift in t o or ou t of 2n d gea r or 5t h gea r. Th e
solen oid is on ly a ct iva t ed du r in g t h e sh ift in g of t h e
t r a n sm ission . Wh en t h e solen oid is a ct iva t ed, h y-
dr a u lic pr essu r e is a pplied t o t h e pr oper sh ift ele-
m en t s in t h e t r a n sm ission t o a llow t h e desir ed sh ift .
On ce t h e sh ift is com plet ed, t h e solen oid is t u r n ed
off.
2-3 s o le n o id - Th e 2-3 solen oid is a ct iva t ed wh en
t h e TCM det er m in es t h a t t h e t r a n sm ission m u st
sh ift in t o or ou t of 3r d gea r. Th e solen oid is on ly
a ct iva t ed du r in g t h e sh ift in g of t h e t r a n sm ission .
Wh en t h e solen oid is a ct iva t ed h ydr a u lic pr essu r e
is a pplied t o t h e pr oper sh ift elem en t s in t h e t r a n s-
m ission t o a llow t h e desir ed sh ift . On ce t h e sh ift is
com plet ed, t h e solen oid is t u r n ed off.
2
after all problem
normally takes several