Audi Workshop Service and Repair Manuals > A3 Mk1 > Power transmission | Automatic gearbox 01M, self-diagnosis | Self diagnosis, V.A.G Inspection Service

Checking a "two-wire bus system” > < Checking gearbox speed sender G38 with 2-pin connector

CAN bus

Bus:

Bus is the term used to describe a data transfer and distribution system.

CAN:

A Controller Area Network is a bus system operating with two wires. They are called bus wires. The bus wires transmit data signals in serial form (one after the other) to the control units connected to the system.

The following control units communicate via the bus, i.e. data exchange between the various control units is carried out via the CAN data bus.

1 -	Automatic gearbox control unit -J217-

2 -	BUS driver

3 -	Engine control unit

4 -	BUS driver

5 -	Matching resistor

6 -	Drivetrain data bus (CAN bus, two wires twisted together)

7 -	Matching resistor

8 -	BUS driver

9 -	ABS control unit -J104-

Power transmission
Automatic gearbox 01M, self-diagnosis / Self diagnosis, V.A.G Inspection Service
CAN bus

Checking a "two-wire bus system” > < Checking gearbox speed sender G38 with 2-pin connector

Audi Workshop Service and Repair Manuals

A3 Mk1

Power transmission Automatic gearbox 01M, self-diagnosis / Self diagnosis, V.A.G Inspection Service CAN bus

Power transmission Automatic gearbox 01M, self-diagnosis / Self diagnosis, V.A.G Inspection Service CAN bus

Power transmission
Automatic gearbox 01M, self-diagnosis / Self diagnosis, V.A.G Inspection Service
CAN bus

Power transmission
Automatic gearbox 01M, self-diagnosis / Self diagnosis, V.A.G Inspection Service
CAN bus