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Symptom: *NO RESPONSE FROM ECM AND PCM (DIESEL ONLY) POSSIBLE CAUSES ATTEMPT TO COMMUNICATE WITH ANOTHER VEHICLE CHECK ECM POWERS AND GROUNDS POWERTRAIN CONTROL MODULE - SCI TRANSMIT CONTROLLER ANTILOCK BRAKE - SCI TRANSMIT SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE SCI CIRCUITS SHORTED TOGETHER SCI TRANSMIT CIRCUIT SHORTED TO GROUND SCI TRANSMIT CIRCUIT OPEN GROUND CIRCUITS AT DLC OPEN ENGINE CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → No → Repair or replace the DRB or DRB cable as necessary. 2 Perform the symptom Checking ECM and PCM Power and Ground Circuits in the All Yes → No → Repair as necessary. 3 Turn the ignition off. All Yes → Replace the Powertrain Control Module. No → 32 COMMUNICATION |