3.2.5 TRANSMISSION OPERATION AND
SHIFT SCHEDULING
Th e t r a nsm ission cover ed in t h is m an u a l h a s
un iqu e sh ift sch edu les depen ding on th e t em per a-
tu r e of t he t r an sm ission oil. Th e t r an sm ission oil
tem per at u re h a s a decisive effect on t h e sh ift qu al-
it y of th e t ra n sm ission . Th e sh ift sch edu le is modi-
fied t o ext en d t he life of the t ra n sm ission while
opera t in g u n der ext rem e con dit ions an d to impr ove
dr iver com for t by m odifyin g sh ift sch edu les.
Th e t r an sm ission oil t emper a tu r e is m ea su r ed
wit h a Temper a tu r e Sen sor on th e NAG1 t ra n sm is-
sion . Th e Tem pera t ur e Sen sor is a n in t egr al com -
pon en t of t h e Tr a n sm ission Solen oid a ssem bly. If
th e Tem per a tu r e Sen sor is cau sing a pr oblem , a
DTC will be set in t h e TCM.
Th e Tra n sm ission Tem pera t ur e Sen sor is wir ed in
series wit h t h e P a rk /Neu tr a l (P /N) swit ch. Th e P/N
swit ch is a lso loca t ed in th e t r an sm ission . Th e t ra n s-
mission t em per a tu r e is only rea d by th e TCM wh en
th e P /N swit ch cl oses wh ile in th e R, D position .
Wh en the sh ift er lever is in t h e pa rk or n eu t r al
posit ion , th e P /N swit ch open s a n d th e t em per a tu r e
bein g disp la yed is E n gin e t em per a t u r e.
AutoStick Feat ur e ( If equipped)
Th is fea t ur e a llows t h e dr iver to m a n ua lly sh ift t he
tr a nsaxle wh en t h e sh ift lever is m oved sidewa ys to
th e (+ / -) in posit ion D to adju st t he sh ift r a n ge.
3.2.6 TRANSMISSION ADAPTIVES -
INITIALIZE AND STORE
In i t ia l iz e Ad a p ti v e - Th is TCM fu n ction sh ould be
used wh en a n ew tr a nsm ission h a s been pla ced in
th e vehicle. Th is com m an d will r eset t he TCM
ada pt ive to t h e fa ctor y set tin g.
Store Adaptive - Th is comm a nd sh ould be used
aft er t he veh icle h a s been t est dr iven by t he tech -
nicia n to st or e a ny lea r ned a da pt ive ch a nges t ha t
occur r ed du rin g t h e t est dr ive. Du r in g n or m al op-
er a t ion a da pt ive ar e u pda t ed ever y 10 min u tes.
Usin g t his com ma n d th e la t est a da pt ive will be
wr it t en t o t h e TCM im m edia t ely.
3.3 DIAGNOSTIC TROUBLE CODES
Dia gn ost ic tr ouble codes (DTC’s) a re codes st ored
by th e Tra n sm ission Cont r ol Modu le (TCM) a n d t he
Sh ift Lever Assem bly Modu le (SLA) t o h elp dia g-
nose Tra n sm ission a n d Sh ift er pr oblem s. Th ey a re
view ed us ing the DR BI I I # sca n tool.
Alwa ys begin by per form in g a visua l in spect ion of
th e wir in g, con nect or s, cooler lin es a n d t h e t r an s-
mission . An y obviou s wir in g pr oblem s or lea ks
sh ould be repa ir ed pr ior t o per for min g an y dia gn os-
tic t est pr ocedur es. Som e en gin e dr ivea bilit y pr ob-
lem s ca n be m isin ter pr eted as a t ra n sm ission pr ob-
lem . E n su re th a t t h e en gin e is ru n n in g pr oper ly
an d t h at n o E CM DTC’s a r e pr esen t t h at could
cau se a tr a nsmission com pla in t .
If t h ere is a com m un ica t ion K-ABS,Sh ift er or
K-TCM circu it pr oblem , t r ou ble codes will n ot be
accessible u n til t h e pr oblem is fixed. Th e DRBIII#
will displa y a n appr opr ia t e messa ge. Th e followin g
is a possible list of ca u ses for a bu s pr oblem :
– open or sh ort t o gr ou nd/ba t ter y in K lin e
cir cu it .
– in t er n a l fa ilu re of a ny m odu le or com pon ent
conn ect ed to t h e K lin e cir cu it
Ea ch dia gn ost ic tr ou ble code is dia gn osed by
followin g a specific test in g sequen ce. Th e dia gn ost ic
test pr ocedu res con t ain st ep-by-st ep in st r uct ion s
for det er min in g t h e ca u se of a t ra n sm ission dia g-
nost ic t rou ble code. P ossible sou rces of th e code ar e
checked an d elim in a t ed on e by one. It is not n eces-
sa ry t o per for m a ll of th e t est s in t h is book t o
dia gn ose an in dividu al code. Th ese test s ar e ba sed
on t h e pr oblem bein g pr esen t a t th e t im e t h a t th e
test is run.
If t he TCM r ecor ds a DTC t h a t will a dver sely
affect t h e veh icles t ra n sm ission , it will r equest (via
th e comm u nica tion bu s) th a t th e E CM illu min a te
th e Ma lfu n ct ion In dica t or La m p (MIL). All tr a ns-
mission DTC’s will be st or ed in t h e TCM.
3.3.1 ACTIVE (HARD) CODE
Any Diagn ost ic Tr ouble Code (DTC) t ha t is set
wh en ever t h e syst em or com pon en t is mon it or ed is
an Act ive code. Th is m ean s t h a t t h e pr oblem is
th er e ever y t im e th e TCM ch ecks t ha t syst em or
compon en t. Som e codes will set im media tely a t
st ar t u p a n d ot h ers will r equ ir e a r oa d t est un der
specific con dit ions t o set the DTC. It mu st be
deter m in ed if a code is Act ive (repea ta ble) or Stor ed
(In ter m it t en t) befor e a tt em pt in g dia gn osis.
3.3.2 STORED (INTERMITTENT) CODE
A dia gn ost ic tr ouble code t ha t is n ot t h er e ever y
tim e t he TCM checks th e cir cuit or fu n ction is a
St ored (In t er mit ten t ) code. P r oblem s t ha t com e a n d
go like th is a r e th e m ost difficu lt t o dia gn ose, th ey
mu st be looked for un der th e specific con dit ion s
th a t ca use them . If t h e DTC is r eset (a ft er a n
ign it ion cycle) th e DTC will be set t o Stor ed (In ter-
mit ten t ) st a tu s. A DTC st at u s ca n be "Active" or
"St ored" (In ter m it t ent ). Act ive is wh en t h e DTC is
pr esen t in t he cont roller a n d th e t ra n sm ission is in
th e pa rt icu la r m ode of oper a t ion for t h at DTC.
St ored m ea n s th a t th e DTC occur r ed a t som e point ,
bu t is n ot cu r r ent ly pr esen t, or t he con dit ion s ha ve
not been r igh t t o ch eck for t he pr esen ce of t h e
pr oblem , wh en a DTC is cla ssified a s St or ed (In ter-
mit ten t ), no TCM rea ct ion is r equ ired.
4
GEN ERAL I N FORM AT I ON
To Next Page
Loading...
