Audi TT Vehicle Systems and Diagnostics 2

Question 1

What type of all-wheel-drive coupling does the transverse-engine Audi TT quattro use to send torque to the rear axle?

Accepted Answer

Haldex electro-hydraulic multi-plate clutch

Answer

The TT is built on a transverse platform, so its quattro system uses a Haldex multi-plate clutch at the rear axle instead of a Torsen or crown-gear center differential.

Question 2

What does Audi magnetic ride on the TT use to change damping force?

Accepted Answer

Magnetorheological fluid whose viscosity changes in a magnetic field

Answer

Magnetic ride dampers hold fluid with magnetic particles that line up when a coil is energized, which changes damping almost instantly.

Question 3

Which dealer-level diagnostic software does Audi use to diagnose and program control modules in the TT?

Accepted Answer

ODIS (Offboard Diagnostic Information System)

Answer

ODIS is the VW Group's official diagnostic and flashing software used in Audi dealerships.

Question 4

A third-generation (8S) TT shows P0300 with no single-cylinder misfire code. What does this code mean?

Accepted Answer

Random or multiple cylinder misfire detected

Answer

P0300 means the ECU has detected misfires that it can't pin to one specific cylinder.

Question 5

What does a failed PCV/oil separator valve typically cause on a TT with the EA888 2.0 TFSI?

Accepted Answer

A whistling noise, lean fuel trim codes, and higher oil consumption

Answer

A torn PCV diaphragm lets in unmetered air, which causes lean codes like P0171, a whistle, and oil getting pulled into the intake.

Audi TT - Certified Audi TT Specialist Practice Test

Audi TT - Certified Audi TT Specialist Practice Test

Audi TT Vehicle Systems and Diagnostics 2