DTC P1698: No Bus Message From Trans Control Module: Notes
WARNING: This page is about a different car, the 2002 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit identification and wiring diagram, see WIRING DIAGRAMS
article. After each repair procedure has been completed, reconnect all components. Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS to ensure system is functioning properly.