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

Boost Solenoid: Testing and Inspection

Solenoid Valve Check:






1. Remove solenoid if necessary.
2. Blow through valve from port A; make sure air does not flow from port B.
3. Apply battery voltage to solenoid and check that air now flows through from A to B.
4. Check solenoid resistance. It should be:

29 - 33 ohms @ 68°F (20°C)

5. If not as specified, replace solenoid valve.