Transmission, Checking

Transmission, checking
Before commencing repair work on the automatic transmission, the exact malfunction cause should be determined as exactly as possible using the diagnostic equipment available.

Note: The automatic transmission is only to be checked as described in the "Troubleshooting - Power transmission" binder if the cause of the damage cannot be located and repaired after the "vehicle self-diagnosis" has been performed in consideration of engine and ATF-level.

Troubleshooting table for "4-speed automatic transmission"
This information was not available at the time of publication of this manual. It will be published as soon as it becomes available from the factory.

Shift points, checking
This information was not available at the time of publication of this manual. It will be published as soon as it becomes available from the factory.

Stall speed, checking
This information was not available at the time of publication of this manual. It will be published as soon as it becomes available from the factory.

Main pressure, measuring

Additional information
=> Special Information, binder; Transmission, No. 12

Conditions for performing check
^ DTC memory checked

When the DTC memory is checked, the following display should appear:
"No malfunction recognized!"
^ ATF level OK
^ If possible, the main pressure test should be performed on a rolling road.

Special tools and equipment





^ VAG 1331 Torque wrench





^ VAG 1702 Automatic transmission tester

^ Remove noise insulation tray.





^ Remove bolt -arrow- for main pressure hole. Always replace bolt.
^ Connect pressure tester VAG 1702 and tighten thumb screw.
^ Start engine.
^ Bleed pressure tester VAG 1702. To do this, loosen thumb screw and tighten when bleeding is complete.
^ Switch off engine.
^ Measure ATF temperature.

If VAS5051 is used to measure ATF temperature:
Connecting vehicle diagnostic, testing and information system VAS 5051
^ Select "08 - read measured value blocks" on the touch screen.
^ Select display group 005 via "Measured value block" and "Change display group number".

The first display zone shows the ATF temperature.
^ Start engine.
^ Allow ATF temperature to rise to 60°C.
^ Measure main pressure at idle speed using VAG 1702.

If VAG 1551 is used to measure ATF temperature:

The following detailed test procedures are described for scan tool VAG 1551.
^ Connect scan tool VAG 1551 and enter address word "02 Transmission electronics" and advance until "Select function XX" is indicated on display.





Indicated on display:
^ Press keys O and 8. (The function "Read measured value block" is selected with 08.)





Indicated on display:
^ Confirm entry with key Q.





Indicated on display:
^ Press keys 0 0 5. (005 selects the "Display group number 005".)
^ Confirm entry with key Q.





Indicated on display:

The first display zone shows the ATF temperature.
^ Start engine.
^ Allow ATF temperature to rise to 60°C.
^ Measure main pressure at idle speed using VAG 1702.





Main pressure specifications at idle





If there are deviations from the prescribed values, the chart notes possible causes:
^ Switch off engine.





Solenoid valve connector -arrow-.
^ Press fuse together and pull off connector.
^ Start engine.
^ Measure main pressure at 2000 RPM.





Main pressure specifications at 2000 RPM
^ If possible, the main pressure test should be performed on a rolling road.





If there are deviations from the prescribed values, the following could be the cause:

After test:
^ Disconnect pressure tester VAG 1702.
^ Install new bolt for main pressure hole and tighten.
Torque setting bolt: 12 Nm

^ Install solenoid valve connector.
^ Once connector has been installed, check and erase DTC memory.
^ If work has been carried out using tester VAS 5051, select diagnostic function "05 - Erasing DTC memory" within the vehicle On Board Diagnostic (OBD) and confirm by pressing "OK".
^ Install noise insulation tray.