Dodge Sprinter 2006 Manual page 319

F ou r Wh eel Speed Sen sor s/Ton e Wh eel a ssem -
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blies
ABS wa r n in g in dica t or
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TCS (ASR) even t in dica t or
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TCS (ASR) wa r n in g in dica t or
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St eer in g An gle Sen sor
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La t er a l Acceler a t ion /Ya w Ra t e Sen sor
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Br a ke P r essu r e Sen sor
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E SP even t in dica t or
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Br a ke F lu id Level swit ch
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Br a ke Swit ch (BS)
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Br a ke La m p Swit ch (BLS)
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TCS Swit ch (TCSS)
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K - ABS
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CAN C Bu s
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F u ses, gr ou n ds, a n d wir in g
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3.7.1 ABS AND TCS (ASR) INDICA TORS
Th is syst em is equ ipped wit h a n ABS wa r n in g
in dica t or, TCS (ASR) wa r n in g in dica t or, a n d TCS
(ASR) even t in dica t or t o a ler t t h e dr iver of a
m a lfu n ct ion /even t it h a s det ect ed. Th e CAB ca n
r equ est t h e illu m in a t ion of t h e ABS wa r n in g in di-
ca t or, TCS (ASR) wa r n in g in dica t or, a n d TCS (ASR)
even t in dica t or via CAN C BUS. Th e CAB con t r ols
t h e ABS wa r n in g in dica t or by:
Ligh t st ea dy du r in g a n in it ia l t est a t t h e begin -
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n in g of a n ign it ion cycle t o fu n ct ion a s a bu lb
ch eck
Ligh t st ea dy wh en a syst em m a lfu n ct ion exist s
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(DTC)
Ligh t st ea dy - If you h a ve n ot m et t h e speed
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r equ ir ed t o r eset /r et est t h e ABS com pon en t s
Th e In st r u m en t Clu st er (IC) con t r ols t h e in dica -
t or s. Th e In st r u m en t Clu st er t r a n sm it s a m essa ge
over t h e CAN C Bu s r ela t in g t o dia gn ost ics a n d
cu r r en t la m p st a t u s for t h e ABS a n d TCS (ASR)
in dica t or s. Th e CAB ca n con t r ol t h e oper a t ion of
TCS wa r n in g a n d TCS even t in dica t or s by:
Bot h ligh t st ea dy wit h en gin e off a n d bot h go ou t
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wit h en gin e r u n n in g
TCS wa r n in g in dica t or ligh t s st ea dy wh en a TCS
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m a lfu n ct ion exist s
TCS even t in dica t or will fla sh wh en TCS is in a n
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a ct ive even t
3.7.2 CONTROLLER ANTILOCK BRAKE
(CAB)
Th e CAB is m ou n t ed dir ect ly t o t h e H ydr a u lic
Con t r ol Un it (H CU) t h a t in clu des a m icr opr ocessor
a n d t welve solen oids t h a t con t r ol va lves t h a t con -
GEN ERAL I N FORM AT I ON
t r ol br a ke pr essu r e du r in g a n t ilock br a kin g or t r a c-
t ion con t r ol even t s. Th e CAB a lso h a s cir cu it s t h a t
m on it or t h e followin g:
Dou ble br a ke swit ch ou t pu t s a r e m on it or ed t o
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det er m in e wh et h er or n ot t o pr epa r e for possible
ABS br a kin g
Wh eel Speed Sen sor s a r e m on it or ed t o det er m in e
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wh en a wh eel is t en din g t o lock u p. Th e CAB will
oper a t e t h e va lves in t h e H CU t o con t r ol br a kin g
pr essu r e du r in g ABS br a kin g
Det ect ABS syst em r ela t ed pr oblem s a n d t a ke
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dia gn ost ic a ct ion
Able t o execu t e self-t est s a n d ou t pu t con t r ol com -
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m a n ds
Wh en equ ipped wit h E lect r on ic St a bilit y (E SP ),
t h e CAB a lso m on it or s t h e followin g:
Th e E SP looks a t t h e St eer in g An gle Sen sor va lu e
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a n d m on it or s t h e speed of t h e in n er a n d ou t er
wh eels t o en su r e t h a t t h e va lu es a r e pla u sible.
Th e St eer in g An gle Sen sor a lso m on it or s t h e
speed t h a t t h e st eer in g wh eel is t u r n ed.
Th e La t er a l Acceler a t ion /Ya w Ra t e Sen sor is con -
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t a in ed in on e u n it . Th e sen sor m ea su r es side t o
side (la t er a l) m ot ion a n d r ot a t ion a l m ot ion (h ow
fa st t h e veh icle is t u r n in g).
Th e E SP u ses da t a fr om t h e Br a ke P r essu r e
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Sen sor t o a n a lyze h ow h a r d a n d fa st t h a t t h e
dr iver wa n t s t o br a ke.
3.7.3 HYDRAULIC CONTROL UNIT (HCU)
Th e H CU on t h e Bosch 5.7 h a s a n in t egr a l va lve
body for con t r ollin g t h e fr on t a n d r ea r br a kes.
Wit h in t h e H CU a r e in let , ou t let , a n d sh u t t le
va lves, t o r elea se br a ke pr essu r e a s r equ ir ed t o
a void wh eel locku p, keepin g t h e wh eels r ollin g, a n d
m a in t a in opt im u m deceler a t ion wit h st a bilit y. Th e
P u m p Mot or is a t t a ch ed t o t h e H CU wh ich wor ks
wit h t h e ABS a n d TCS a n d is con t r olled by t h e
CAB. Th e pr im a r y fu n ct ion is t o pr ovide ext r a
a m ou n t of flu id wh en n eeded.
3.7.4 SWITCHES/SENSORS
B RAKE S WITCH (B S ): Th is swit ch pr epa 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 BS wh en t h e br a ke
peda l is eit h er r elea sed/depr essed. Th e F u sed Ign i-
t ion Swit ch Ou t pu t cir cu it su pplies 12 volt s t o t h e
BS. A r elea sed br a ke peda l will close t h e BS cir cu it
a n d t h e BS Ou t pu t cir cu it su pplies 12 volt s t o t h e
CAB. Wh en t h e dr iver depr esses t h e br a ke peda l,
t h e BS 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
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