Dodge Sprinter 2006 Manual page 419

1 .0 I N T RODU CT I ON
Th e pr ocedu r es con t a in ed in t h is m a n u a l in clu de
a ll specifica t ion s, in st r u ct ion s a n d gr a ph ics n eeded
t o dia gn ose en gin e con t r ol m odu le (E CM) a n d sen -
t r y key r em ot e en t r y m odu le (SKRE E M) pr oblem s;
t h ey a r e n o st a r t , dia gn ost ic t r ou ble code (DTC) a n d
n o t r ou ble code pr oblem s for t h e E CM. Th e dia gn os-
t ics in t h is m a n u a l a r e ba sed on t h e t r ou ble con di-
t ion or sym pt om bein g pr esen t a t t h e t im e of dia g-
n osis.
Wh en r epa ir s a r e r equ ir ed, r efer t o t h e a ppr opr i-
a t e ser vice in for m a t ion for t h e pr oper r em ova l a n d
r epa ir pr ocedu r e.
Dia gn ost ic pr ocedu r es ch a n ge ever y yea r. New
dia gn ost ic syst em s m a y be a dded; ca r r yover sys-
t em s m a y be en h a n ced. IT IS RE COMME NDE D
TH AT YOU RE VIE W TH E E NTIRE MANUAL TO
BE COME FAMILIAR WITH ALL NE W AND
CH ANGE D DIAGNOSTIC P ROCE DURE S.
Th is m a n u a l will cover a ll t h e n ecessa r y r equ ir e-
m en t s t o begin a logica l dia gn ost ic pa t h for ea ch
pr oblem . If t h er e is a dia gn ost ic t r ou ble code (DTC)
det ect ed, go t o t h e t r ou ble code t est . If t h er e a r e n o
DTCs pr esen t , go t o a n o t r ou ble code (*), sym pt om
ba sed t est .
Th is book r eflect s m a n y su ggest ed ch a n ges fr om
r ea der s of pa st issu es. Aft er u sin g t h is book, if you
h a ve a n y com m en t s or r ecom m en da t ion s, plea se fill
ou t t h e for m a t t h e ba ck of t h e book a n d m a il it ba ck
t o u s.
1.1 SYSTEM COVERAGE
Th is dia gn ost ic pr ocedu r es m a n u a l cover s 2005
Spr in t er veh icles equ ipped wit h t h e 2.7L com m on
r a il diesel en gin e.
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Dia gn osis of t h e en gin e con t r ol m odu le (E CM)
a n d sen t r y key im m obilizer syst em (SKRE E M) is
don e in six ba sic st eps:
ver ifica t ion of com pla in t
•
ver ifica t ion of a n y r ela t ed sym pt om
•
sym pt om a n a lysis
•
pr oblem isola t ion
•
r epa ir of isola t ed pr oblem
•
ver ifica t ion of pr oper oper a t ion
•
NOTE: All tests in this manual should be per-
formed with the engine at operating temperature,
unless otherwise specified within a particular test.
GEN ERAL I N FORM AT I ON
2 .0 I DEN T I FI CAT I ON OF
SY ST EM
Th e E CM is loca t ed t o t h e left of t h e st eer in g
colu m n beh in d t h e st eer in g colu m n open in g cover.
Th e sen t r y r em ot e en t r y m odu le (SKRE E M) is
a t t a ch ed t o t h e r ea r of t h e in st r u m en t clu st er.
3 .0 SY ST EM DESCRI PT I ON AN D
FU N CT I ON AL OPERAT I ON
3.1 GENERAL DESCRIPTION
Th e 2.7L dir ect in ject ion diesel en gin e syst em is
equ ipped wit h t h e la t est t ech n ica l a dva n ces. Th e
on -boa r d dia gn ost ics in cor por a t ed in t h e en gin e
con t r ol m odu le a n d SKRE E M a r e in t en ded t o a ssist
t h e field t ech n icia n in r epa ir in g veh icle pr oblem s by
t h e qu ickest m ea n s.
Th e en gin e syst em in cor por a t es a com m on r a il
fu el deliver y design wit h exh a u st em ission feed-
ba ck. Th is design u t ilizes elect r on ica lly con t r olled
solen oid va lve t ype fu el in ject or s. E a ch in ject or is
con t r olled in dividu a lly by t h e E CM. In ject or t im in g
a n d fu el qu a n t it y a r e con t r olled by t h e E CM ba sed
on in pu t s fr om va r iou s sen sor s. Th e pr ecision con -
t r ol of t h e in ject or s by t h e E CM h elps t o r edu ce t h e
en gin e n oise, odor a n d sm oke.
3.2 FUNCTIONAL OPERA TION
3.2.1 ECM ON-BOARD DIAGNOSTICS
Th e E CM is pr ogr a m m ed t o m on it or differ en t
cir cu it s of t h e diesel fu el in ject ion syst em . Th is
m on it or in g is ca lled on -boa r d dia gn ost ics.
Cer t a in cr it er ia m u st be m et for a dia gn ost ic
t r ou ble code t o be en t er ed in t o t h e E CM m em or y.
Th e cr it er ia m a y be a r a n ge of: en gin e r pm , en gin e
t em per a t u r e, t im e or ot h er in pu t sign a ls t o t h e
E CM. If a ll of t h e cr it er ia for m on it or in g a syst em or
cir cu it a r e m et , a n d a pr oblem is sen sed, t h en a
DTC will be st or ed in t h e E CM m em or y.
It is possible t h a t a DTC for a m on it or ed cir cu it
m a y n ot be en t er ed in t o t h e E CM m em or y, even
t h ou gh a m a lfu n ct ion h a s occu r r ed. Th is m a y h a p-
pen wh en t h e m on it or in g cr it er ia h a ve n ot been
m et .
Th e E CM com pa r es in pu t sign a l volt a ges fr om
ea ch in pu t device wit h specifica t ion s (t h e est a b-
lish ed h igh a n d low lim it s of t h e in pu t r a n ge) t h a t
a r e pr ogr a m m ed in t o it for t h a t device. If t h e in pu t
volt a ge is n ot wit h in t h e specifica t ion s a n d ot h er
t r ou ble code cr it er ia a r e m et , a DTC will be st or ed
in t h e E CM m em or y.
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