ADT Network Communication & CAN Bus Systems 3

Question 1

For which type of application was FlexRay introduced into Audi vehicles?

Accepted Answer

Safety-critical and time-deterministic functions such as active chassis control and steer-by-wire

Answer

FlexRay was adopted for applications requiring guaranteed, time-deterministic data delivery at high speed, such as active suspension, electronic stability systems, and drive-by-wire technologies.

Question 2

What maximum data rate does FlexRay achieve on each channel compared to standard high-speed CAN?

Accepted Answer

FlexRay reaches up to 10 Mbps per channel

Answer

FlexRay supports up to 10 Mbps per channel (two channels possible for 20 Mbps total), far exceeding the 500 kbps of standard HS-CAN.

Question 3

Which automotive Ethernet standard is used in modern Audi vehicles to transmit high-bandwidth data such as camera and radar sensor streams over a single unshielded twisted pair?

Accepted Answer

100BASE-T1 (BroadR-Reach / OPEN Alliance Single Pair Ethernet)

Answer

100BASE-T1, also known as BroadR-Reach or OPEN Alliance STP Ethernet, transmits 100 Mbps over a single unshielded twisted pair, making it ideal for ADAS sensor data in automotive environments.

Question 4

In ODIS, which diagnostic function performs an automatic scan of all network-connected control modules and displays their stored fault codes in a single report?

Accepted Answer

Vehicle self-diagnosis (auto-scan)

Answer

The vehicle self-diagnosis (auto-scan) function in ODIS automatically queries every module on all network buses and compiles their DTCs into a unified fault report.

Question 5

Fault code U0100 is stored in several control modules of an Audi. What does U0100 specifically indicate?

Accepted Answer

Lost communication with the Engine Control Module (ECM/ECU)

Answer

U0100 is the standardized SAE J2012 code for 'Lost Communication with ECM/PCM,' meaning the storing module cannot receive expected messages from the engine control unit.

(ADT) Audi Diagnostic Technician Practice Test

(ADT) Audi Diagnostic Technician Practice Test

ADT Network Communication & CAN Bus Systems 3