Signal too low: Verification: Verification

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

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector(s) Reinstallation

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Reinstall the connectors, components etc.
• Ignition on
• Check that the air flow is correct. The value must be approximately 0 kg/h with the engine switched off
• Start the engine. Read off the air flow. The value may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
• Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.
  Fig 3: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Identifying Mass Air Flow (MAF) Sensor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are the values correct? 

• YES 

  VERIFIED:  Troubleshooting has been completed.

• NO 

  Refer to Information