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

Malfunction Indicator Lamp: Description and Operation

The CHECK ENGINE lamp (MIL) is located in the main instrument display panel and supplied with current from the +15 circuit. The lamp is controlled from pin 8 of the control module and lights up when the ignition switch is turned to the ON position. It goes out as soon as the control module receives signals from the crankshaft position sensor unless activated by the OBD II system.