Operation CHARM: Car repair manuals for everyone.
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

Data Link Communications Operation

The Class 2 serial data link is used so the following modules can communicate data with each other:
^ The Body Control Module (BCM)
^ The Electronic Brake Control Module (EBCM)
^ The Inflatable Restraint Sensing and Diagnostic Module (SDM)
^ The Instrument Panel Cluster
^ The Powertrain Control Module (PCM)
^ The Heater-A/C Control