Dodge Ram 2004 - Compass;Mini-Trip Computer; Bus Messages Missing

Symptom:
BUS MESSAGES MISSING
POSSIBLE CAUSES
NO RESPONSE - PCI BUS - PCM
NO REPONSE - PCI BUS - MIC
CMTC
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, select SYSTEM MONITORS, then J1850 Module Scan..
Does the DRBIIIt display PCM Active on the Bus?
All
Yes → Go To 2
No → Refer to COMMUNICATION category for the related symptom.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition on.
With the DRBIIIt, select Electro/Mechanical Instrument Cluster.
Is there a response from the Instrument Cluster?
All
Yes → Replace and configure the CMTC in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Refer to COMMUNICATION category for the related symptom.
Perform BODY VERIFICATION TEST - VER 1.
302
COMPASS/MINI-TRIP COMPUTER