Definitions

Definitions
These explanations refer only to this assembly group: 6-speed automatic transmission 09G. These definitions are not necessarily valid generally.

Further information concerning this subject can be found in the respective Self-study program.

ABS
Anti-locking brake system. Further information on ABS can be found in the relevant self-study programs.

ATF (Automatic Transmission Fluid)
Transmission oil for automatic transmission

ATF level
Level of ATF in transmission when full.

Automatic transmission 09G
A further development of the dynamic shift program and is equipped with planetary gear set and Ravigneaux planetary gearbox.

Data bus low (high)
The voltage used to transport data is low (high). Further information concerning this subject can be found in Self-study program "CAN-BUS Operation".

Torque converter
Transfers the engine torque to the automatic transmission and acts as an hydraulic drive-away clutch. The torque converter also contains the lock-up clutch.

DSP (Dynamic Shift Program)
Further information concerning this subject can be found in Self-study program No. 180.

Hill climbing program
The hill program is an item of software in the control module which influences the shift points when the vehicle is being driven up hill.

Short to Ground
Current flows incorrectly to Ground without supplying an electrical consumer.

Short to positive
Current flows incorrectly to a live component without supplying a consumer.

On-Board Diagnostic (OBD) or Self-diagnosis
The capability of the control module: to detect faults, to react to faults, to store faults, to register faults and make them available to the measured value block.

"[]" Button
Entry zone on screen of VAS 5051, also known as the "Advance" button.

Further information concerning this subject can be found in Self-study program No. 202.

Performing electrical check
A targeted check of the electronic components by certain measurements.

Performing vehicle OBD or self-diagnosis
Connecting the Vehicle Diagnosis, Test and Information System VAS 5051 to, among other things, read Diagnostic Trouble Code (DTC) memories, perform default settings or the read measured value blocks.

Vehicle Diagnosis, Testing and Information System VAS 5051
The operating modes "Vehicle self-diagnosis", "Measurement technology" and "Guided fault finding" offer the most complete of current technical information.

It replaces and expands all functions that were previously possible with the V.A.G 1551 Scan Tool or Vehicle test system V.A.G 1552.

Further information concerning this subject can be found in Self-study program No. 202.

Sender for transmission output RPM -G195-
The sensor records the speed of the output gear and transmits it to the automatic transmission control module.

Sensor for transmission RPM -G182-
The sensor records the speed of the planetary carrier in the Ravigneaux planetary gear set and transmits it to the automatic transmission control module.

Transmission fluid temperature sensor -G93-
Monitors the temperature of the ATF to ensure the transmission does not overheat. It is located on valve body in the wiring harness to the sensors.

Guided Fault finding
An operating mode of the Vehicle Diagnosis, Testing and Information System VAS 5051.

Initiate basic setting
Learned values in a control module are reset to factory (default) settings.

Initialization
A predetermined setting activated by a predetermined program sequence.

Clutches
Together with the brakes, they engage the individual gears.

Shift lock solenoid -N110-
Located in the selector mechanism close to the selector lever. Prevents involuntary movement of the selector lever out of positions "P" and "N" as long as the brake pedal is not depressed.

Solenoid valves or pressure control valves
A solenoid valve opens or closes an oil channel to a clutch or brake.

A pressure control valve regulates the ATF pressure to a clutch or brake.

Multi-function Transmission Range (TR) switch -F125-
Electrical switch with various functions.

Emergency running
When a sensor fails the control module selects a replacement signal and introduces replacement functions. If this is possible an emergency mode will be initiated.

The emergency running mode is a "Condition of the control module", which ensure faults detected by the control module will not affect continued driving safety. It protects the transmission from damage while impairing the driving characteristics only as much as necessary.

Parking lock
The selector lever locks the parking lock wheel when the vehicle is stationary and prevents the vehicle from rolling (involuntarily).

Starting interlock relay -J207-
When selector lever is in position "R" the relay switch on the back-up lights. The required signal comes from the multifunction switch.

In selector lever positions "P" and "N" the relay allows the use of the starter motor.

Valve body
Located on the bottom of the transmission and is enclosed in the ATF oil pan. Its valves regulate the hydraulic pressure and distributes it via the oil channels to switch elements (clutches and brakes)

Automatic Transmission Control Module (TCM) -J217-
The electronic control module defines the shift points. The function of the transmission is monitored via On-Board Diagnostic (OBD). If a component or sensor fails, an emergency running program is initiated to ensure the vehicle can still be driven.

Tiptronic
A supplementary selector gate to the right of the normal selector gate which when manually tipping the selector lever toward Up (+) will change up a gear, and when tipping to Down (-) will change down a gear.

TCC (Torque converter lock-up clutch)
It transfers the engine torque mechanically to the transmission.

Shift lock
Prevents involuntary movement of the selector lever out of positions "P" and "N" as long as the brake pedal is not depressed.

Ignition key withdrawal lock
Ensures that the ignition key can only be withdrawn when park position is selected and in addition mechanically locks the selector lever in this position.