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

Checking IAC Motor

Tests 1 - 4:




Tests 5 - 8:




SYMPTOM
CHECKING IDLE AIR CONTROL MOTOR

POSSIBLE CAUSES
- Engine speed within tolerance
- IAC motor connector observable defect
- Engine has vacuum leaks
- IAC motor defective