Checking The Knock Sensor (KS) Signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

Fig 2: Connecting Connector

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Reinstall the components, reconnect the connectors etc.
• Start the engine and run it to normal operating temperature
• Rev the engine to 3500 RPM. Read off the value of the knock sensor (KS) signal.

  The value must be between 2 and 6.

  If the value is now OK it means that the cause of the fault was loose connections in connector.

  Other information 

  • To access or replace the knock sensor (KS), see KNOCK SENSOR (KS), REPLACING
  • For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
  • For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
  Fig 3: Identifying Connector Terminals

  Courtesy of VOLVO CARS CORPORATION
  Fig 4: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION
  Fig 5: Identifying Knock Sensor

  Courtesy of VOLVO CARS CORPORATION

Is the value between 2 and 6? 

• OK 

  OKAY:  Troubleshooting has been completed.

• NOT OK 

  Refer to REPLACING THE COMPONENT