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

ICM3 - Check ICM Wire For Open



- Key OFF.

- Install Breakout Box (leave PCM disconnected).

- Disconnect the 6-pin distributor connector.

- Measure the resistance between BOB Test Pin ICM and the ICM terminal at the 6-pin distributor connector.

- Is the resistance less than 5 ohms?

Yes -- Go to ICM4. ICM4 - Check ICM Wire For Short

No -- Service the ICM wire for open(s).