DTC P1698: No Bus Message From Trans Control Module: Description

Messages from Transmission Control Module (TCM) are monitored when engine on and battery voltage more than 10 volts. The Powertrain Control Module (PCM) and TCM communicate messages across the Chrysler Collision Detection (CCD) bus, as information from either module is needed to operate their respective systems. DTC will set in PCM memory if no CCD bus messages are received from TCM for 10 seconds. Possible causes for DTC to set are: open circuit on CCD bus, defective PCM, defective TCM, or defective connectors or wiring.