On Board Diagnostics, or OBD, is an automotive term
referring to a vehicle's self-diagnostic and reporting
capability. OBD systems give the vehicle owner or repair
technician access to the status o
The electronic throttle control (ETC) system consists of the
accelerator-pedal module, the engine control module (ECM), and
the electronic throttle body. The electronic throttle body
mainly consist
Ignition
A spark ignition (SI) engine requires a spark to initiate
combustion in the combustion chamber. Voltage is supplied to the
spark plug where the electricity will arc across a gap at a
volta
General Description
The following procedure is used to diagnose the Engine
Component Power Supply Relay -J757- and the power supply voltage
that is provided to the engine components.
Special tools and workshop equipment
required
Multimeter.
Wiring Diagram.
Scan Tool.
Test requirements
Fuse
Fig. 194 Driver side cockpit: fuse panel with plastic bracket
Fuse panel (1) (black)
Convenience access and start authorization
control module
Audi phone box, USB connection
Head-up display
Audi music interface, USB connection
Steering column lock
Upper/lower display
Instrument cluster
On Board Diagnostic Systems
