Dodge Ram 2004 Service Manual page 300

COMMUNICATION
*NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC —
TEST
8 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII from the DLC.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the PCM SCI Transmit circuit from the Data Link harness
connector (cav 7) to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 9
→ Repair the PCM SCI Transmit circuit for an open.
No
9 If there are no possible causes remaining, view repair.
Repair
ACTION
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1.
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Continued
APPLICABILITY
All
All