ATF Level, Checking and Correcting

ATF level, checking and correcting, 09L, 6 Spd. A/T AWD

Special tools, testers and auxiliary items required:

^ Vehicle diagnostic, testing and information system VAS 5051 A
^ Drip tray V.A.G 1306
^ ATF charging device V.A.G 1924
^ Safety goggles

Conditions
^ Transmission must not be in emergency running (backup) mode.
^ Vehicle must be level (horizontal).
^ Selector lever in position "P", engine idling.
^ Air conditioner and heating system switched off.
^ Vehicle diagnostic, testing and information system VAS 5051 A connected; vehicle self-diagnosis and vehicle system 02 - gearbox electronics selected.
^ The ATF temperature at the beginning of the test must not be higher than 30°C. If necessary, first allow the transmission to cool down.

Note:
^ The ATF temperature is taken from the reading on the vehicle diagnostic, testing and information system VAS 5051 A.
^ The ATF level will vary according to the ATF temperature.
^ If the ATF level is checked when the ATF temperature is too low, this will result in overfilling.
^ If the level is checked when the ATF temperature is too high, this will result in under filling.
^ Both overfilling and under filling have a detrimental effect on the functioning of the transmission.
^ Use only correct type of ATF (available as a replacement part) for the planetary gearing in automatic transmission 09L.
Other oils cause faults and/or failure of the transmission, for ATF specification refer to Capacities.

ATF temperature reading
Display on VAS 5051 A:





- From list - 1 - select diagnostic function "08 - Read data block (measured value block)".





Display on VAS 5051 A:
1 - Enter display group
- Use keypad - 2 - to enter 4 for Display group number 4 and confirm by touching Q key.





Display on VAS 5051 A:
- Reading for ATF temperature is shown in display zone - 1 -

Checking and correcting ATF level

Note:
^ The ATF level is checked at the ATF inspection plug.
^ The ATF level is correct if a small amount of fluid comes out at the ATF inspection plug when ATF temperature is between 35°C and 45°C, or 50°C in hot climates (the fluid level rises due to expansion as it warms up).

- Drive vehicle onto a four-column hoist or over an inspection pit so that it is absolutely horizontal.
- Fill container of ATF charging device V.A.G 1924 with ATF for automatic transmission 09L.

CAUTION: The ATF charging device must be clean and the ATF must not be mixed with other types of ATF!





- Secure reservoir for ATF charging device V.A.G 1924 as high as possible on vehicle.
- Start engine and let it idle.
- Place drip tray V.A.G 1306 under transmission.

CAUTION: Wear safety goggles.





- When an ATF temperature of 35°C is reached, remove ATF inspection plug - arrow B - and drain off any surplus ATF.





- Replace seal - arrow - for ATF inspection plug.





If ATF comes out of inspection hole before ATF has reached 40°C the ATF level - arrow - is OK

Note: The ATF inspection plug must be screwed in again at the latest when ATF reaches a temperature of 45°C (or 50°C in hot climates).

If no ATF emerges from ATF inspection hole when ATF has reached 45°C, top off with ATF.
- Install new seal on ATF inspection plug and tighten to 80 Nm. The ATF check is now completed.
- End function "08 - Read data block (measured value block)" by touching <- key.
- Press "06 - End output".
- Switch off ignition and disconnect diagnostic connector.

Filling up ATF
If no ATF emerges from ATF inspection hole when ATF has reached 40°C, top off with ATF.

Note:
- The ATF inspection plug must be screwed in again at the latest when ATF temperature reaches 45°C (or 50°C in hot climates). If necessary, switch off the engine, allow transmission to cool down and repeat the test.





- Guide filler nozzle of ATF charging device V.A. G 1924 in from below through an opening in deflector cap - arrow -, taking care not to push deflector cap upward out of position.
- Fill with ATF using ATF charging device V.A.G 1924 until ATF comes out of inspection hole.

Note:
^ The ATF level must not be too low or too high, otherwise this would impair the function of the transmission.

- Install new seal on ATF inspection plug and tighten to 80 Nm.
- End function "08 - Read data block (measured value block)" by touching, <- key.
- Press "06 - End output".
- Switch off ignition and disconnect diagnostic connector.