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

Signal Description, Accessory Electronic Module (AEM)






Signal description. Accessory electronic module (AEM)









Note! It is important to connect the breakout box and check the ground terminals before taking readings.

Other information
- Connecting the breakout box. Accessory electronic module Connecting the Breakout Box, Accessory Electronic Module (AEM)
- Checking the ground terminal Checking the Ground Terminal. Accessory Electronic Module