Dodge Sprinter 2006 - No Can Communication with Ecm

Symptom:
NO CAN COMMUNICATION WITH ECM
POSSIBLE CAUSES
DTC P RE SE N T
OP E N CAN CIRCUITS AT INSTRUMENT CLUSTE R
INSTRUMENT CLUSTER
CH E CK P OWERS AND GROUN DS TO THE AFF ECTE D MODULE
OP E N CAN CIRCUITS AT E CM
ECM
TE S T ACTION AP PLICAB ILITY
1 Wit h th e DRBIII", r ecor d a nd er a se DTC’s.
Cycle th e ign it ion swit ch from ON t o OF F t o ON.
Wit h th e DRBIII",readDTC’s.
Did t h is DTC r eset ?
All
Ye s → Go To 2
No → Th e con dit ion s th a t cau sed th is code t o set a r e n ot pr esen t at th is
tim e. Usin g t h e wir in g dia gr a m /schem a t ic as a guide, in spect th e
wir in g a n d con n ect ors for a n in t er mit t en t con dit ion .
Per for m BODY VERIFICATION TE ST - VE R 1.
2 Wit h t h e DRBIII", ch eck t h e TCM, ABS, a n d th e ATC Modu le for t his sa m e or sim ila r
ECM m essa ge er r or DTC.
Is t h e sa m e or sim ila r DTC set in th e oth er m odu les?
All
Ye s → Go To 3
No → Go To 5
3 Tur n th e ign it ion off.
Discon n ect t he E CM ha r n ess con n ect or.
Ch eck ea ch power a n d gr ou n d cir cu it to th e modu le.
Wer e an y pr oblem s fou n d?
All
Ye s → Refer to th e wir in g dia gr a m s loca t ed in t h e ser vice in for m a t ion t o
help isola t e an open or sh or t ed con dit ion . Repa ir as n ecessa r y.
Per for m BODY VERIFICATION TE ST - VE R 1.
No → Go To 4
4 Tur n th e ign it ion off t o t h e lock posit ion .
Discon n ect t he E CM ha r n ess con n ect or.
Mea su r e t h e r esist a n ce bet ween t h e CAN C Bu s (+) cir cu it a n d th e CAN C Bu s (-)
cir cu it in th e ECM h a r n ess con n ector.
Is t h e resista n ce 120 ohm s, ± 3.0 oh m s?
All
Ye s → Repla ce th e E CM in a ccor da n ce with t h e ser vice in for ma t ion .
Per for m BODY VERIFICATION TE ST - VE R 1.
No → Repa ir t h e CAN C Bus (+) or th e CAN C Bu s (-) cir cu it for a n open .
Per for m BODY VERIFICATION TE ST - VE R 1.
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INSTRUMENT CLUSTER