Dodge Sprinter 2006 Manual page 1658

11 - 6 EXHAUST SYSTEM
INSPECTION
Visu a lly in spect t h e ch a r ge a ir cooler for cr a cks,
h oles, or da m a ge. In spect t h e t u bes, fin s, a n d welds
for t ea r s, br ea ks, or ot h er da m a ge. Repla ce t h e
ch a r ge a ir cooler if da m a ge is fou n d.
P r essu r e t est t h e ch a r ge a ir cooler, u sin g Ch a r ge
Air Cooler Test er Kit .
INSTALLA TION
(1) In st a ll ch a r ge a ir cooler t o r a dia t or (F ig. 3).
(2) Con n ect power st eer in g cooler loop t o ch a r ge
a ir cooler (F ig. 3).
(3) Con n ect ch a r ge a ir h oses (F ig. 3).
(4) In st a ll bot h r a dia t or t r im pieces (F ig. 3).
(5) In st a ll fr on t gr ille wit h fr on t cr oss m em ber.
(6) In st a ll h ea dla m p a ssem blies.
(7) In st a ll fr on t bu m per.
T U RBOCH ARGER
DESCRIPTION
Th e boost pr essu r e va cu u m solen oid is loca t ed
u n der t h e a ir filt er h ou sin g a n d is r espon sible for
t u r bo-ch a r ger boost pr essu r e. It gen er a t es a con t r ol
va cu u m in r espon se t o a P WM sign a l fr om t h e E CM.
Va cu u m is a ch ieved by m ixin g t h e syst em va cu u m
(fr om t h e va cu u m pu m p) wit h a t m osph er ic pr essu r e
t o a cer t a in degr ee. Th e r esu lt in g va cu u m is sen t t o
t h e va cu u m u n it a t t h e t u r boch a r ger (F ig. 4).
Fig. 4 CHARGE PRESSURE VACUUM TRANSDUCER
1 - CONNECTION TO TURBOCHARGER VACUUM UNIT
2 - VENT
3 - SUPPLY FROM VACUUM PUMP
OPERA TION
Th e va cu u m solen oid r eceives 12V fr om t h e E CM.
Th e E CM con t r ols t h e solen oid t h r ou gh a P WM sig-
n a l. Wh en t h e solen oid r eceives a sign a l it closes t h e
pa ssa ge t o a t m osph er ic pr essu r e. Th e su bch a m ber is
n o lon ger u n der a t m osph er ic pr essu r e, it 's spr in g ca n
pu sh t h e dia ph r a gm a n d va lve down wa r ds; t h is
r elea ses t h e VAC du ct . Va cu u m ca n n ow go fr om h er e
t h r ou gh t h e t h r ot t le h ole, filt er s a n d ou t t h e con n ec-
t ion t o t h e t u r boch a r ger va cu u m u n it (F ig. 5).
VA