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

Hot Coolant Indicator

The PCM continuously monitors the engine coolant temperature sensor. The PCM controls Hot Coolant indicator during the following instances:
^ At an engine coolant temperature of approximately 124°C (255°F)
^ At a sender resistance of approximately 53 Ohm