1. Raise the vehicle.
2. Disconnect from a drive a socket and vacuum hoses. Turn away bolts and remove a drive.
3. On fitting 1 of the drive, create a vacuum of 20 torr, while the fork should move to the right.
4. On fitting 2 of the drive, create a vacuum of 20 torr, while the fork should move to the left.
5. If the operation of the drive is different from the specified, then replace the drive.
6. Install the drive in reverse order. Remove any remaining sealant and apply fresh. Check the condition of the hoses and connector pins. Replace damaged hoses.