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

Clearing Trouble Codes

Any time a repair is made, CLEAR the memory by:
1. Turn ignition switch OFF.
2. Disconnect the small (16-pin) connector on the 4EAT Control Unit.
3. Remove the STAR Tester, Volt Ohm Meter (VOM), or 4EAT Tester.
4. Then repeat Quick Test Steps 2.0 and 3.0 to ensure that the repair was effective.