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.
Data Bus On Board Diagnostic Interface -J533- Connector, From My 2009
2009 Audi A6 BaseSECTION Data Bus On Board Diagnostic Interface -J533- Connector, From My 2009
Optical MOST-Bus Connection (fiber optic) -A-
Fig 1: View Of Optical MOST-Bus Connection (Fiber Optic) -A- And 20-pin Connector -B- (From MY 2009)
- Input
- Output
20-pin Connector -B-
Fig 2: View Of Optical MOST-Bus Connection (Fiber Optic) -A- And 20-pin Connector -B- (From MY 2009)
- Battery + (Terminal 30)
- LIN 1
- ACC Rel.
- ESL
- Convenience CAN bus low
- CAN bus Low (drivetrain)
- CAN bus Low (extended)
- CAN bus Low (instrument cluster)
- CAN bus Low (diagnosis)
- Shielding (Most diagnosis)
- Ground - (terminal 31)
- LIN 2
- Instrument cluster wake-up
- Terminal 15
- Convenience CAN bus high
- CAN bus High (drivetrain)
- CAN bus High (extended)
- CAN bus High (instrument cluster)
- CAN bus High (diagnosis)
- Shielding
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.