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

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Main Relay (Computer/Fuel System): Testing and Inspection




INSPECTION
Operation check
Listen for operational sound of the main relay while cranking the engine.

Continuity Inspection
1. Remove the main relay.




2. Apply battery positive voltage (B+) and check continuity between terminals of the relay.
3. If not as specified, replace the main relay.