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

VTEC Solenoid Valve Test

VTEC Solenoid Valve Test

1. Disconnect the VTEC solenoid valve connector.




2. Measure resistance between the VTEC solenoid valve 1P connector terminal No.1 (A) and body ground.

- If the resistance is as specified, go to step 3.
- If the resistance is not as specified, replace the VTEC solenoid valve.




3. Remove the VTEC solenoid valve/oil filter assembly (A) from the oil pump, and check the VTEC solenoid valve filter (B) for a restriction. If there is a restriction, replace the VTEC solenoid valve filter, the engine oil filter, and the engine oil.




4. If the filter is not restricted, remove the VTEC solenoid valve (A) and push the valve (B) with your finger to check its movement. If the valve moves freely, it is normal, check the engine oil pressure. If the valve binds or sticks, replace the VTEC valve assembly.