| These explanations refer only to the 01M automatic gearbox. They are not to be applied generally. |
| ATF (Automatic Transmission Fluid) |
| This is a pump with a toothed wheel and sickle-shaped element, turned by the torque converter. |
| It feeds the automatic gearbox, the lubrication points and the torque converter with ATF. |
| “Refill level” of ATF in the gearbox. The correct working order and comfort of the gearbox stems from the ATF level being maintained and checked carefully. To measure the ATF level, take the instructions in the Workshop Manual into account. |
| This is distinguished by a more developed dynamic gearbox programme and includes Ravigneaux planet gears. |
| These are responsible for driving the different forward and reverse speeds of the planet gears in combination with the clutches and allow different transmission ratios of the forward speeds to be established. Unlike the clutches, the brakes are supported against the gearbox casing. |
| Data transport. To this end, the electrical signals are transferred in different forms (bus). |
| The voltage used to transfer data is low/high. |
| This transfers the engine torque to the automatic gearbox and is used as a hydraulic clutch. The torque converter also includes the clutch cancellation. |
| The capability of the control unit to: detect faults, react to faults, memorise faults and record measured values and display them in the measured value block. |
| Carrying out the self-diagnosis |
| Connecting the fault reader in order to read the faults stored. |
| Carrying out electrical checking |
| Systematic checking of electronic components by measurements. |
| This increases the torque in the converter during ignition. |
| In terms of the deployment of technical resources, it simplifies gearbox control without cutting off the traction force, guarantee unchangeable gear quality. |
| Gearbox speed sender -G38- |
| This sender records the speed of the long planet gear and sends it to the automatic gearbox control unit. |
| This sender records the speed of the drive sprocket and sends it to the automatic gearbox control unit. |
| Gearbox oil temperature sender -G93- |
| This monitors the ATF temperature so that it does not overheat the gearbox. It is located in the slide box, inside the wiring harness leading to the solenoid valves. |
| This is a mode of operating the vehicle diagnosis, testing and information system -VAS 5051-. |
| The kick-down switch is incorporated into the accelerator cable. On pressing the accelerator fully, the transmission changes to a lower gear in order to accelerate. |
| In combination with the brakes, these are responsible for driving the different forward and reverse speeds of the planet gears and allow different transmission ratios of the forward speeds to be established. |
| Wiring and component positions in the vehicle. |
| Electromagnet for selector lever locking -N110- |
| This is housed in the gearbox drive mechanism, near to the selector lever. It prevents the selector lever from being released (involuntarily) from positions “P” or “N” when the brake pedal is not being pressure. |
| These open and close the pipes for the clutch and gear oil. |
| This is an electric switch that has different functions. |
| If a sensor is faulty, the control unit selects replacement signals and brings into force the corresponding replacement functions. If this is not possible, it brings into force the emergency function. |
| The emergency function is an “operative status of the control unit” so that if the control unit detects faults or errors, driving security continues to be established, the gearbox being protected from possible damage and the driving performance being affected as little as possible. |
| With the vehicle at a standstill, the selector lever locks the parking lock sprocket and immobilises the vehicle, preventing it from rolling involuntarily by inertia. |
| This is the mechanical part of the automatic gearbox and is driven by clutches and brakes, without interrupting the power flow. |
| Relay for starter blocking and reversal light -J226- |
| The reversal lights are switched on through the relay, with the selector lever in position “R”. The signal comes from the multi-function switch. |
| With the selector lever in positions “P” and “N”, the starter motor is activated through the relay. |
| This is located at the rear of the gearbox, enclosed in the ATF sump. Its valves control the hydraulic pressure and distribute it through the oil pipes to the control elements (clutches and brakes). |
| Automatic gearbox control unit -J217- |
| The electronic control unit, together with the dynamic gear programme, defines the shift points. The operating of the gearbox is controlled by self-diagnosis. If components or sensors fail, the drive capacity remains in force through an emergency programme. |
| Abbreviation for between faces. |
| ÜK (torque converter clutch cancellation) |
| This mechanically transmits the engine torque to the gearbox. |
| Selector lever position indicator -Y6- |
| On the dash panel, this indicates the position of the selector lever and the gear selected with the Tiptronic system. |
| This prevents the selector lever from being released (involuntarily) from positions “P” or “N” when the brake pedal is not being pressure. |
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