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)

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EGR Control Solenoid: Testing and Inspection



1. Unplug solenoid electrical connector.
2. Connect a 12 volt source to 1 of the solenoid terminals.
3. Connect & disconnect a ground to the other solenoid terminal.
If the solenoid clicks each time the ground is provided, the solenoid is operating properly.
If the solenoid does not click when the ground is provided, the solenoid is not operating correctly & should be replaced.