Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2012A3 (8PA) L4-2.0L TURBO (CBFA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSDIAGRAMSCONNECTOR VIEWSDATA BUS ON BOARD DIAGNOSTIC INTERFACE CONNECTOR
2012 Audi A3 (8PA) L4-2.0L Turbo (CBFA)
Data Bus On Board Diagnostic Interface Connector
2012 Audi A3 (8PA) L4-2.0L Turbo (CBFA)SECTION 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
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.