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
If it fails: lemon-manuals.org.ua

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On Board Diagnostics II (OBDII) Symbol

On Board Diagnostics II (OBDII) Symbol:

The OBDII symbol is used on circuit diagrams to alert the technician that the circuit is essential for proper OBDII emission control circuit operation. Any circuit which, if it fails, causes the SERVICE ENGINE SOON indicator to turn on, is identified as an OBDII circuit.