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

Replacement of PCM (ECM) and SMARTRA

In case of a defective ECM, the unit has to be replaced by "virgin" or "neutral" ECM. All keys have to be programmed into the new ECM. Keys, which are not programmed into ECM, are invalid for the new ECM. Refer to key teaching procedure. The vehicle specific data have to be left unchanged due to the unique programming of transponder.

In case of a defective SMARTRA, there is no special procedure required. A new SMARTRA device simply replaces the old one. There are no transponder - related data stored in this device.