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

Tire Monitoring System: Service and Repair



If a warning light is observed, check tire(s) and inflate to specified pressures. The resonant circuit remains closed as long as the tire inflation pressure remains above a specific setpoint value for the switch, turning warning light off.