Dodge 2006 Sprinter, Руководство пользователя

Страница: 919 / 2315

pr ocedu r es, fu r t h er det a ils on wir e h a r n ess r ou t in g
a n d r et en t ion , a s well a s pin -ou t a n d loca t ion views
for t h e va r iou s wir e h a r n ess con n ect or s, splices a n d
gr ou n ds.
Th e E MIC m odu les for t h is m odel a r e ser viced on ly
a s com plet e u n it s. Th e E MIC m odu le ca n n ot be
a dju st ed or r epa ir ed. If a ga u ge, a n LE D in dica t or,
t h e m u lt i-fu ct ion in dica t or LCD u n it , a n elect r on ic
t on e gen er a t or, t h e elect r on ic cir cu it boa r d, t h e cir-
cu it boa r d h a r dwa r e, t h e clu st er over la y, t h e clu st er
h ou sin g, t h e clu st er h ood, t h e clu st er len s, or t h e
clu st er r ea r cover a r e da m a ged or fa u lt y, t h e en t ir e
E MIC m odu le m u st be r epla ced.
OPERATION
Th e E lect r oMech a n ica l In st r u m en t Clu st er (E MIC)
is design ed t o a llow t h e veh icle oper a t or t o m on it or
t h e con dit ion s of m a n y of t h e veh icle com pon en t s a n d
oper a t in g syst em s. Th e ga u ges, m et er s a n d in dica t or s
in t h e E MIC pr ovide va lu a ble in for m a t ion a bou t t h e
power t r a in , fu el a n d em ission s syst em s, coolin g sys-
t em , ligh t in g syst em s, sa fet y syst em s a n d m a n y
ot h er con ven ien ce it em s. Th e E MIC is in st a lled in
t h e in st r u m en t pa n el so t h a t a ll of t h ese m on it or s
ca n be ea sily viewed by t h e veh icle oper a t or wh en
dr ivin g, wh ile st ill a llowin g r ela t ive ea se of a ccess for
ser vice. Th e m icr opr ocessor-ba sed E MIC h a r dwa r e
a n d soft wa r e u ses va r iou s in pu t s t o con t r ol t h e
ga u ges a n d in dica t or s visible on t h e fa ce of t h e clu s-
t er. Som e of t h ese in pu t s a r e h a r d wir ed, bu t m a n y
a r e in t h e for m of elect r on ic m essa ges t h a t a r e t r a n s-
m it t ed by ot h er elect r on ic m odu les over t h e Con t r ol-
ler Ar ea Net wor k (CAN) da t a bu s n et wor k. (Refer t o
8 - E LE CTRICAL/E LE CTRONIC CONTROL MOD-
ULE S/COMMUNICATION - OP E RATION).
Th e E MIC m icr opr ocessor sm oot h s t h e in pu t da t a
u sin g a lgor it h m s t o pr ovide ga u ge r ea din gs t h a t a r e
a ccu r a t e, st a ble a n d r espon sive t o oper a t in g con di-
t ion s. Th ese a lgor it h m s a r e design ed t o pr ovide
ga u ge r ea din gs du r in g n or m a l oper a t ion t h a t a r e con -
sist en t wit h cu st om er expect a t ion s. H owever, wh en
a bn or m a l con dit ion s exist su ch a s h igh coola n t t em -
per a t u r e, t h e a lgor it h m ca n dr ive t h e ga u ge poin t er
t o a n ext r em e posit ion a n d t h e m icr opr ocessor ca n
sou n d a ch im e t h r ou gh t h e on -boa r d a u dible t on e
gen er a t or t o pr ovide dist in ct visu a l a n d a u dible in di-
ca t ion s of a pr oblem t o t h e veh icle oper a t or. Th e
in st r u m en t clu st er cir cu it r y a lso pr ovides a u dible
t u r n sign a l a n d h a za r d wa r n in g su ppor t by em u la t -
in g t h e “t ickin g” sou n d a ssocia t ed wit h a con ven -
t ion a l elect r o-m ech a n ica l fla sh er u sin g a con t a ct less
r ela y. Th e r ela y will a lso pr ovide a n in dica t ion of a
t u r n sign a l fa ilu r e by sou n din g a t dou ble t h e u su a l
fr equ en cy. E a ch a u dible wa r n in g is pr ovided t o t h e
veh icle oper a t or t o su pplem en t a visu a l in dica t ion .
Th e E MIC cir cu it r y oper a t es on ba t t er y cu r r en t
r eceived t h r ou gh a n on -swit ch ed fu sed B(+) cir cu it ,
a n d on a fu sed ign it ion swit ch ou t pu t cir cu it . Th e
E MIC cir cu it r y is gr ou n ded t h r ou gh a gr ou n d cir cu it
a n d t a ke ou t of t h e fr a m e wir e h a r n ess wit h a n eye-
let t er m in a l con n ect or t h a t is secu r ed t o a st u d by a
n u t a t a gr ou n d loca t ion on t h e da sh pa n el ju st for-
wa r d of t h e in st r u m en t clu st er. Sepa r a t e swit ch ed
gr ou n d in pu t s fr om t h e key-in ign it ion swit ch a n d
t h e fr on t door ja m b swit ch es pr ovide wa ke-u p sign a ls
t o t h e E MIC cir cu it r y. Th is a r r a n gem en t a llows t h e
E MIC t o pr ovide som e fea t u r es r ega r dless of t h e ign i-
t ion swit ch posit ion , wh ile ot h er fea t u r es will oper a t e
on ly wit h t h e ign it ion swit ch in t h e On posit ion .
P r oper dia gn osis a n d t est in g of t h e E MIC, t h e
CAN da t a bu s, t h e da t a bu s elect r on ic m essa ge
in pu t s t o a n d ou t pu t s fr om t h e E MIC, a s well a s t h e
r et r ieva l or er a su r e of a Dia gn ost ic Tr ou ble Code
(DTC) r equ ir es t h e u se of a dia gn ost ic sca n t ool.
Refer t o t h e a ppr opr ia t e dia gn ost ic in for m a t ion . See
t h e own er ’s m a n u a l in t h e veh icle glove box for m or e
in for m a t ion on t h e fea t u r es, u se a n d oper a t ion of t h e
E MIC.
GAUGES
All ga u ges r eceive ba t t er y cu r r en t t h r ou gh t h e
E MIC cir cu it r y on ly wh en t h e in st r u m en t clu st er
det ect s t h e ign it ion swit ch is in t h e On posit ion . Wit h
t h e ign it ion swit ch in t h e Off posit ion , ba t t er y cu r-
r en t is n ot su pplied t o a n y ga u ges a n d t h e E MIC cir-
cu it r y is pr ogr a m m ed t o m ove a ll of t h e ga u ge
n eedles ba ck t o t h e low en d of t h eir r espect ive sca les.
Th er efor e, t h e ga u ges do n ot a ccu r a t ely in dica t e a n y
veh icle con dit ion u n less t h e ign it ion swit ch is in t h e
On posit ion .
All of t h e E MIC ga u ges a r e a ir cor e m a gn et ic
u n it s. Two fixed elect r om a gn et ic coils a r e loca t ed
wit h in ea ch ga u ge. Th ese coils a r e wr a pped a t r igh t
a n gles t o ea ch ot h er a r ou n d a m ova ble per m a n en t
m a gn et . Th e m ova ble m a gn et is su spen ded wit h in
t h e coils on on e en d of a pivot sh a ft , wh ile t h e ga u ge
n eedle is a t t a ch ed t o t h e ot h er en d of t h e sh a ft . On e
of t h e coils h a s a fixed cu r r en t flowin g t h r ou gh it t o
m a in t a in a con st a n t m a gn et ic field st r en gt h . Cu r r en t
flow t h r ou gh t h e secon d coil ch a n ges, wh ich ca u ses
ch a n ges in it s m a gn et ic field st r en gt h . Th e cu r r en t
flowin g t h r ou gh t h e secon d coil is ch a n ged by t h e
E MIC cir cu it r y in r espon se t o m essa ges r eceived over
t h e CAN da t a bu s. Th e ga u ge n eedle m oves a s t h e
m ova ble per m a n en t m a gn et a lign s it self t o t h e
ch a n gin g m a gn et ic fields cr ea t ed a r ou n d it by t h e
elect r om a gn et s.
P r oper dia gn osis a n d t est in g of t h e ga u ges, t h e
CAN da t a bu s a n d t h e elect r on ic da t a bu s m essa ge
in pu t s t o t h e E MIC t h a t con t r ol ea ch ga u ge r equ ir e
t h e u se of a dia gn ost ic sca n t ool. Refer t o t h e a ppr o-
pr ia t e
dia gn ost ic in for m a t ion . Specific oper a t ion
det a ils for ea ch ga u ge m a y be fou n d elsewh er e in
t h is ser vice in for m a t ion .
VA INSTRUMENT CLUSTER 8J - 5