Definitions
Definitions, 09G, 6 Spd. A/T
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 respective Self-study programs.
ATF (Automatic Transmission Fluid)
Oil for automatic transmission
ATF pump
A gear type pump. It is driven by the torque converter.
Supplies the automatic gear changes, all lubricating points and the torque converter with ATF.
ATF level
"Level" of ATF in the transmission.
Automatic transmission 09G
Portrays a further development of the dynamic shift program and is equipped with planetary gear set and Ravigneaux planetary gearbox.
Brakes
These select the individual forward and reverse gears of the planetary gearbox in combination with the clutches and provides various ratios for the forward gears. Different from the clutches, the brakes support against the transmission housing.
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 No. WSP 52141900, The CAN Data Bus.
Torque converter
Transfers the engine torque to the automatic transmission and acts as a hydraulic drive-away clutch. The torque converter also contains the lock-up clutch.
Self-diagnosis or On-Board Diagnostic (OBD) program
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, key
Entry zone on screen of Vehicle Diagnosis, Testing and Information system VAS 5051, also known as the "Continue" key.
Performing electrical check
A targeted check of the electronic components by certain measurements.
Performing vehicle self diagnosis
Connecting the Vehicle Diagnosis, Test and Information System VAS 5051, to, among other things, read fault 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.G1551 Scan Tool or the vehicle system tester V.A.G1552.
Freewheel/stator
Ensures the torque increase in the torque converter when driving off.
Freewheel/transmission
Technically simplifies the gear changes without interrupting the power and ensures a constant gear change quality.
Transmission output speed (RPM) sensor -G195-
The sensor records the speed of the output gear and transmits it to the automatic transmission control module.
Transmission input speed (RPM) sensor -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 the valve body in the wiring harness to the solenoid valves.
Guided Fault finding
An operating mode of 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.
Cable guide
Routing of electrical wiring to components in the vehicle.
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 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 transmission control module, which ensures that faults detected 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).
Planetary gearbox
A mechanical component of the automatic transmission and is switched via the clutches and brakes without loss of power.
Starting interlock relay -J207-
When the selector lever is in position "R" the relay switch on the back-up lights. The required signal comes from the multifunction TR 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 distribute it via the oil channels to switch elements (clutches and brakes)
Transmission Control Module (TCM) -J217-
The electronic control module defines the shift points. The function of the transmission is monitored via self-diagnosis. 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 pushing the selector lever toward Up (+) will change up a gear, and when pushing to Down (-) will change down a gear.
TCC (Torque converter lock-up clutch)
It transfers the engine torque mechanically to the transmission.
Transmission Range (TR) display -Y6-
Indicates on a display in the instrument cluster the position of the selector lever or the gear selected by Tiptronic.
Ignition key removal 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.