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

Engine Coolant Level

The scan tool displays coolant level as Low or OK.

The PCM checks the engine coolant level continuously. If the coolant level switch indicates low coolant level at any time, the PCM will send information through serial data to the Instrument Panel Cluster (IPC) to turn ON the low coolant level telltale.