P1698 No Bus Message From Trans Control Module

NAME OF CODE
No CCD/PCI BUS Message From Trans Control Module

WHEN MONITORED
Equipped with auto trans, the ignition key on, engine running, trans in drive, vehicle road speed, and battery voltage greater than 10 volts.

SET CONDITION
No CCD messages from the TCM for 10 seconds, two trips required.

THEORY OF OPERATION
The Chrysler Programmable Communication Interface multiplex system (PCI BUS) consists of a single wire. The Body Control Module (BCM) acts as a hub for all modules and connects to the Data Link Connector (DLC). Each Module on the PCI Bus uses a local ground as a Bus reference. Continuous information is broadcast across the PCI Bus in order for Modules to share sensor information from a common sensor.

POSSIBLE CAUSE
- Open BUS wire between PCM and BCM
- Open BUS wire between TCM and BCM
- BCM BUS circuit internally open
- PCM BUS circuit internally open
- TCM BUS circuit internally open
- BUS shorted to ground
- BUS shorted to voltage