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

In Dynamic Chamber




1. Connect circuit tester to sensor terminals.
2. Ensure resistance is 41.5 ± 4.15k ohms at 68°F, 11.85 ± 1.19k ohms at 122°F and 3.5 ± .35k ohms at 185°F.