No Response From Ecm (Pci Bus) - Diesel Only - Dodge Ram 2004 Service Manual

COMMUNICATION
Symptom:

*NO RESPONSE FROM ECM (PCI BUS) - DIESEL ONLY

ECM PCI NO RESPONSE
PCI BUS CIRCUIT OPEN
ENGINE CONTROL MODULE
TEST
1 Turn the ignition on.
NOTE: As soon as one or more module communicates with the DRB, answer
the question.
With the DRBIII , enter Anti-Lock Brakes.
With the DRBIII , enter Body then Electro/Mechanical Cluster (MIC).
With the DRBIII , enter Passive Restraints then Airbag.
Were you able to establish communications with any of the modules?
Yes → Go To 2
→ Refer to symptom PCI Bus Communication Failure in the Com-
No
POSSIBLE CAUSES
ACTION
munications category.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIE-
SEL).
270
APPLICABILITY
All