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

A/C Request

The scan tool displays YES or NO. YES displayed indicates that the HVAC system has requested A/C compressor operation. The HVAC system sends the A/C request information to the PCM via the Class 2 serial data circuit.