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

On-Board Diagnostic



Tools

The following tools are required for troubleshooting:

Porsche System Tester 2 or commercially available generic scan tool







Special tool 9637







Commercially available digital multimeter







Special tool V.A.G 1315 A/1







Special tool 9160/1








Special tool P 378a with connecting wire 9559







Special tool 9103/2







HC tester







NOTE: For resistance measurements on the components, the special tool 9637 must be connected only to the wiring harness, as the values could otherwise be falsified via the DME control module.