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 MANUALSAUDI2007A3 BASE, AUTOMATIC DCTREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALGAUGESINSTRUMENTS90 INSTRUMENTSDESCRIPTION AND OPERATIONDATA BUS ON BOARD DIAGNOSTIC INTERFACE CONNECTOR
2007 Audi A3 Base, Automatic DCT
Data Bus On Board Diagnostic Interface Connector
2007 Audi A3 Base, Automatic DCTSECTION Data Bus On Board Diagnostic Interface Connector
20-pin connector, black
- Battery + (terminal 30)
- Battery + (terminal 30)
- Reserved for external diagnosis
- Reserved for K-lead
- Comfort CAN bus Low
- Powertrain CAN bus Low
- Reserved for shielding
- CAN Bus instrument cluster Low
- Diagnostic CAN bus Low
- CAN-Bus Infotainment Low
- ground - (terminal 31)
- ground - (terminal 31)
- Instrument cluster prompt input
- Terminal 15
- Comfort CAN bus high
- Power CAN bus high
- Reserved for shielding
- CAN Bus instrument cluster High
- Diagnostic CAN bus High
- CAN-Bus Infotainment High
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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.