Signal Too High: Verification: Overview

HINT: After carrying out the repair, check that the fault has been remedied. 

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

Fig 2: Connecting Connector

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Reconnect the connectors. Reinstall the components
• Test drive the car according to the TRIP schedule. See VERIFYING REPAIRS .

  Connect VIDA (Volvo scan tool) again and read out the difference between the front and rear heated oxygen sensors (HO2S).

  The value must be lower than +/-0.01.

  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION
  Fig 4: Front Heated Oxygen Sensor

  Courtesy of VOLVO CARS CORPORATION

Is the value lower than +/- 0.01? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to CHECKING COMPONENTS AND WIRING