Dodge Sprinter 2006 - No Communication with Ecm (Active)

Symptom:
NO COMMUNICATION WITH ECM (ACTIVE)
Wh e n Mo n i to re d a n d S e t Co n d it i o n :
NO COMMUNICATION WITH ECM (ACTIVE)
Wh en Mon it or ed: Wit h t h e ign it ion on .
Set Con dit ion : This DTC will set if t h e Au tom a t ic Tem per a tu r e Con tr ol (ATC) fa ils t o
receive a ll m essa ges fr om t h e E CM.
POSSIBLE CAUSES
CAN C BUS CIRCUIT(S) SH ORTE D OR OP E N
ENGINE CONTROL MODU LE DTC(S) P RE SE NT
ENGINE CONTROL MODU LE ’S P OWE R/GROUN D CIRCUIT(S) SH ORTE D OR OP E N
ENGINE CONTROL MODULE
CAN C BUS (+)/CAN C BUS (-) CIRCUIT(S) OP E N TO EN GINE CONTROL MODULE
AUTOMATIC TE MPE RATURE CONTROL (ATC)
CAN C BUS (+)/CAN C BUS (-) CIRCUIT(S) OP E N TO AUTOMATIC TE MPE RATURE CONTROL
TE S T ACTION AP PLICAB ILITY
1 Tur n th e ign it ion on .
Wit h th e DRBIII", r ea d Aut om a t ic Tem per a t u r e Con t r ol DTCs.
Does t h e DRBIII" display: NO COMMUNICATION BUS?
All
Ye s → Refer t o t h e Com m u n ica t ion ca tegor y for th e r ela t ed sym pt om .
Per for m BODY VERIFICATION TE ST - VE R 1.
No → Go To 2
2 Tur n th e ign it ion on .
Wit h th e DRBIII", r ea d E ngin e Con t r ol Modu le DTCs.
Does t h e DRBIII" display a ny DTCs?
All
Ye s → Refer t o P ower t r ain Dia gn ost ic in for m a t ion for th e rela t ed sym p-
tom (s).
Per for m BODY VERIFICATION TE ST - VE R 1.
No → Go To 3
3 Tur n th e ign it ion on .
Wit h th e DRBIII", check th e TCM, IC, a n d ABS m odu le for th e sa m e or sim ila r No
Com m u n ica t ion wit h E n gin e Con t r ol Modu le DTC.
Does t h e DRBIII" displa y sa m e or sim ila r DTC in TCM, IC, & ABS m odu le?
All
Ye s → Go To 4
No → Go To 6
163
HEAT IN G & A/C