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

Service Engine Soon Indicator

The SERVICE ENGINE SOON indicator is turned on with the ignition switch in the ON position. After the engine is started, the SERVICE ENGINE SOON indicator remains on for a prove out duration of three seconds. If the PCM fails to send the REC an OFF status message, the SERVICE ENGINE SOON indicator will remain illuminated. After the prove out duration, the SERVICE ENGINE SOON indicator is controlled directly by the PCM via the SCP to the HEC.