Dodge Sprinter 2006 Manual page 320

GEN ERAL I N FORM AT I ON
r ea d opposit e swit ch st a t es. N o te : Th e B S a n d
B LS a re in th e s a m e s w itc h h o u s in g .
B RAKE LAMP S WITCH (B LS ): Th is swit ch pr e-
pa r es t h e CAB for a possible a n t ilock even t . Th e
CAB u ses a n ou t pu t st a t e volt a ge fr om t h e BLS
wh en t h e br a ke peda l is eit h er depr essed/r elea sed.
Th e F u sed Ign it ion Swit ch Ou t pu t cir cu it su pplies
12 volt s t o t h e BLS. A depr essed br a ke peda l will
close t h e BLS cir cu it a n d t h e BLS Ou t pu t cir cu it
su pplies 12 volt s a t t h e CAB. Wh en t h e dr iver
r elea ses t h e br a ke peda l, t h e BLS Ou t pu t cir cu it
volt a ge dr ops t o 0 volt s a n d t h e CAB sen ses t h e
br a ke peda l st a t e. Th is t ells t h e CAB wh a t posit ion
t h e br a ke peda l is cu r r en t ly in t o m a ke a n ABS
even t possible. Wh en u sin g t h e DRBIII in In pu t s/
Ou t pu t s, t h e BS a n d BLS will r ea d opposit e swit ch
st a t es. N o te : Th e B S a n d B LS a re in th e s a m e
s w itc h h o u s in g .
TRACTION CON TROL
(TCS S ): Th is swit ch sign a ls t h e CAB t o eit h er t u r n
ON or OF F t h e TCS. Th e dr iver ca n t oggle t h e
TCSS, wh ich r eceives 12 volt s fr om t h e D (+) Rela y
Ou t pu t cir cu it . Depen din g on t h e posit ion of t h e
TCSS, open or closed, t h e CAB r eceives t h e TCSS
st a t e volt a ge on t h e TCS Swit ch Sen se cir cu it .
Wh en 12 volt s a r e a pplied t o t h e TCS Swit ch Sen se
cir cu it , t h e TCS is OF F. Wh en n o volt a ge is pr esen t ,
t h e TCS is ON.
WHEEL S P EED S EN S ORS
WHEELS : Th e Bosch 5.7 syst em u ses on e pa ssive
WSS on ea ch wh eel. Th e sen sor m ea su r es t h e wh eel
speed by m on it or in g a r ot a t in g t on e wh eel. As t h e
t eet h of t h e t on e wh eel m ove t h r ou gh t h e m a gn et ic
field of t h e sen sor a n AC volt a ge a n d a m per a ge is
gen er a t ed. Th is sign a l fr equ en cy in cr ea ses or de-
cr ea ses pr opor t ion a lly t o t h e speed of t h e wh eel.
Th e CAB m on it or s t h is sign a l t o ch eck for a su dden
ch a n ge in sin gle or m u lt iple wh eel deceler a t ion s. If
t h e deceler a t ion of on e or m or e wh eels is n ot wit h in
a pr edet er m in ed a m ou n t , t h e CAB t a kes con t r ol for
a n t ilock a ct ion t h r ou gh t h e H CU. E a ch WSS h a s a
m a gn et ic in du ct ive pick u p coil (WSS) t h a t is
m ou n t ed t o a fixed com pon en t . Th er e is a n a ir ga p
bet ween t h e t on e wh eel a n d t h e speed sen sor a s-
sem bly. Dia gn ost ica lly, t h e coils of t h e Wh eel Speed
Sen sor s h a ve t h e sa m e a m ou n t of r esist a n ce. Wh en
m ea su r ed a cr oss t h e CAB h a r n ess con n ect or t er m i-
n a ls, t h e r esist a n ce sh ou ld be bet ween 1100 - 1800
oh m s. Refer t o ser vice m a n u a l for WSS r epla cem en t
a n d a ir ga p specifica t ion s.
Cor r ect ABS oper a t ion is depen den t on Ton e
Wh eel speed sign a l fr om t h e WSS. Th e veh icle
wh eels a n d t ir es sh ou ld a ll be t h e sa m e size a n d
t ype t o get a ccu r a t e sign a ls. In a ddit ion , a ll t ir es
sh ou ld be a t r ecom m en ded t ir e pr essu r es.
S YS TEM S WITCH
AN D TON E
3.7.5 SELF TESTS
Th e syst em soft wa r e in clu des sever a l self t est s
t h a t a r e per for m ed ever y t im e t h e ign it ion is t u r n ed
on a n d t h e veh icle is dr iven . Som e of t h e self t est s
occu r im m edia t ely, wh ile ot h er s occu r u n der n or m a l
dr ivin g con dit ion s wh ile n ot in a n t ilock oper a t ion .
Th e CAB ch ecks con t in u ou sly for a m issin g or
er r a t ic WSS sign a ls/cir cu it s, t on e wh eels, solen oids,
pu m p m ot or or solen oid r ela y by per for m in g sever a l
t est s su ch a s: dyn a m ic, st a t ic, oh m ic, volt a ge dr op,
a n d t im ed r espon se. If a n y com pon en t exh ibit s a
fa u lt du r in g t est in g, t h e CAB will r equ est t o illu m i-
n a t e t h e ABS a n d TCS wa r n in g in dica t or s.
As a n a ddit ion a l ch eck of t h e E SP syst em , a r oa d
t est pr ocedu r e is a va ila ble on t h e DRBIII . Th is
t est sh ou ld be ca r r ied ou t wh en a n y E SP com pon en t
is r epla ced in or der t o en su r e pr oper fu n ct ion . Sin ce
t h e wh eel speed sen sor s a r e r equ ir ed in pu t s t o t h e
E SP, t h is t est sh ou ld a lso be per for m ed if t h e wh eel
speed sen sor s a r e r epla ced.
F ir st , t h e br a kes a r e a pplied wit h t h e veh icle
st a t ion a r y. Th en , t h e veh icle is dr iven a t a ppr oxi-
m a t ely 6 MP H . Th e dr iver h a s t o m a ke left a n d
r igh t t u r n s, wit h a m in im u m 90 degr ee st eer in g
t u r n in g a n gle. If t h e in dica t or la m p goes ou t , ever y-
t h in g is in or der. If t h e la m p r em a in s illu m in a t ed,
t h e DRBIII will displa y t h e fa u lt codes t h a t a r e
ca u sin g t h e t est t o fa il. Th e r oa d t est fu n ct ion is set
in t h e E SP con t r ol m odu le, a n d ca n on ly be dea ct i-
va t ed on ce t h er e a r e n o m or e fa u lt codes det ect ed.
Th e St eer in g An gle Sen sor m u st be in it ia lized. A
pr ocedu r e is ca r r ied ou t u sin g t h e DRBIII
en su r e t h a t t h e m odu le det ect s t h e exa ct posit ion of
t h e sen sor. Th e sen sor m u st be ca libr a t ed a n y t im e
wh eel a lign m en t is ch a n ged, t h e st eer in g colu m n is
r em oved a n d r e-in st a lled, or t h e sen sor is r epla ced.
3.8 USING THE DRBIII
Refer t o t h e DRBIII u ser 's gu ide for in st r u ct ion s
a n d a ssist a n ce wit h r ea din g dia gn ost ic t r ou ble
codes, er a sin g dia gn ost ic t r ou ble codes a n d ot h er
DRBIII fu n ct ion s.
3.9 DRBIII ERROR MESSAGES
Un der n or m a l oper a t ion , t h e DRBIII
pla y on e of on ly t wo er r or m essa ges:
— User-Requ est ed WARM Boot or User-Requ est ed
COLD Boot .
If t h e DRBIII sh ou ld displa y a n y ot h er er r or
m essa ge, r ecor d t h e en t ir e displa y a n d ca ll t h e
STAR Cen t er for in for m a t ion a n d a ssist a n ce. Th is
is a sa m ple of su ch a n er r or m essa ge displa y:
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will dis-