Replacing the transmission control system

• Perform the following check. See Test pressurization
• Check the cooling system's pipes and connections to the automatic transmission. Check for leakage.
  Fig 1: Identifying Transmission

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the pressure drop? 

• YES 

  Refer to Checking the cooling system 

• NO 

  Refer to Checking software