Pcm Messages Not Received - Dodge Ram 2004 Service Manual

INSTRUMENT CLUSTER
Symptom:

PCM MESSAGES NOT RECEIVED

When Monitored and Set Condition:
PCM MESSAGES NOT RECEIVED
When Monitored: With the ignition on.
Set Condition: The MIC does not receive any messages from the PCM for at least 5
seconds.
PCM MESSAGES NOT RECEIVED
ATTEMPT TO COMMUNICATE WITH THE PCM
PCI BUS CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST
1 Turn the ignition on.
NOTE: To proceed in this test, the DTC must be active.
With the DRB, enter SYSTEM MONITORS then J1850 MODULE SCAN.
Is the PCM active on the BUS?
Yes → Check the condition of the J1850 Bus circuit wiring. Erase DTC,
→ Go To 2
No
2 Turn the ignition on.
With the DRB, attempt to communicate with the PCM.
Was the DRB able to communicate with the PCM?
Yes → Go To 3
→ Refer to the communication category and perform the appropriate
No
POSSIBLE CAUSES
ACTION
if DTC resets replace the Instrument Cluster in accordance with
the service information.
Perform BODY VERIFICATION TEST - VER 1.
symptom.
Perform BODY VERIFICATION TEST - VER 1.
434
APPLICABILITY
All
All