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)

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Input Signals

Input Signals

With this menu item, input signals of the heating/air-conditioning system can be read in using the Porsche System Tester 2. This allows the function of the input signals to be assessed very quickly.

The following input signals can be read in:
- A/C button
- Compressor voltage
- Engine signal (indication of engine start)
- Terminal 58 (lighting)