Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Circuit Operation
There are two data lines that can be accessed with a scan tool. The Serial Data Line UART (800 CKT) allows the scan tool (when connected),
Powertrain Control Module, Instrument Panel Cluster, Sensing Diagnostic Module, and the Electronic Brake Control Module to communicate via serial data. The Serial Data Line Class 2 (1807 CKT) allows a scan tool to directly access the Powertrain Control Module to read emissions related information. A scan tool can gain access to both data lines through the Data Link Connector
(DLC). System operations can then be monitored or controlled for diagnostic purposes.