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

Reset Procedure

Reset Procedure

1. Turn on condition
A. When tire pressure is below allowed threshold.
B. Indicates that tire needs to be re-inflated to placard pressure / repaired.

2. Turn off condition
A. Under-inflation ; When tire pressure is above (warning threshold + hysteresis).
B. Rapid Leak ; When tire pressure is above (leak warning threshold).