VTD Class 2 Communications Description. Chevrolet Cavalier 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Cavalier 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 VTD Class 2 Communications Description

The Passlock™ system requires the following components to communicate various functions in order to operate:

•	The powertrain control module (PCM)

•	The instrument cluster

The communication occurs over the UART serial data line, or CKT 800. Refer to Instrument Panel Cluster Microprocessor for an explanation of the operation of the UART.