Checking serial communication to screens 1

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Restore cables and contacts.
• Ignition on.

  Check the voltage on the serial connections between Rear Seat Entertainment Module (RSE) and the screens (4 cables). In all cases the voltage shall be approx. 2.5 V.

  HINT: It is easier to take measurements at the upper connector for the display screens. 

  Other information 

  • See Signal specification, rear seat entertainment module (RSE)
  • See Rear seat entertainment module (RSE), replacing
  • See Head restraint with TV screen, replacing
  • See Checking wiring and terminals
  Fig 2: Identifying Cable Connector To Display Screen/Head Restraint

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the voltage below 2 V for any measurement? 

• YES 

  Refer to Checking serial communication to screens 2 

• NO 

  Refer to Checking voltage to Rear Seat Entertainment Module (RSE)