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)

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Data Bus On Board Diagnostic Interface Connector






Data Bus On Board Diagnostic Interface Connector

20-pin connector, black






1. Battery + (terminal 30)

2. Battery + (terminal 30)

3. Reserved for external diagnosis

4. Reserved for K-lead

5. Comfort CAN bus Low

6. Powertrain CAN bus Low

7. Reserved for shielding

8. CAN Bus instrument cluster Low

9. Diagnostic CAN bus Low

10. CAN-Bus Infotainment Low

11. ground - (terminal 31)

12. ground - (terminal 31)

13. Instrument cluster prompt input

14. Terminal 15

15. Comfort CAN bus high

16. Power CAN bus high

17. Reserved for shielding

18. CAN Bus instrument cluster High

19. Diagnostic CAN bus High

20. CAN-Bus Infotainment High