Checking the wires and components

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Disconnect RTI switch unit.
• Ignition on.

  Activate buttons and read status on audio/telephone switch unit buttons.

  If read-out gave a correct result the fault is in the RTI switch unit.

  Additional information: 

  • To access RTI switch unit, see RTI switch .
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Did read-out of status on audio/telephone switch unit give a correct result? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the wires and components 

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Disconnect audio/telephone switch unit by loosening the lower connector on the audio/telephone switch unit.
• Ignition on.

  Activate buttons and read status on cruise-control switch unit buttons.

  If read-out gave a correct result the fault is in the audio/telephone switch unit.

  Additional information: 

  • To access audio/telephone switch unit, see RTI switch .
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Did read-out of status on cruise-control switch unit give a correct result? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the wires and components 

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Disconnect cable to audio/telephone by loosening the lower connector on the cruise-control switch unit.
• Ignition on.

  Activate buttons and read status on cruise-control switch unit buttons.

  If read-out gave a correct result the fault is in the cable between the audio/telephone switch unit and cruise-control switch unit.

  Additional information: 

  • To access cruise control switch unit, see RTI switch .
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Did read-out of status on cruise-control switch unit give a correct result? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the wires and components 

Check the voltage between B1 and B3. The voltage should be approximately 12 V.

Check the voltage between B2 and B3. The voltage should be approximately 5 V.

Check voltage between B3 and battery negative lead. The voltage should be approximately 0 V.

If voltages measured above are OK, the fault is in the cruise-control switch unit.

Additional information: 

• To connect the test box, see Connecting the breakout box

Fig 1: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.