Checking status

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Start the engine.

  Check the camshaft adaptation by reading off the adaptation values of the camshaft (flanks 1-4). All values must be between -7° and +7°.

  Turbocharged engines:  When checking, the accelerator pedal (AP) must be depressed slightly but the engine speed must be below 1200 RPM.

  Naturally aspirated engines:  When checking the engine must be idling.

  HINT: Theoretically the values for flanks 1-4 should be the same, however because of mechanical tolerances the values may vary between the different flanks by approximately 2°. 

  If all the adaptation values are correct (between -7° and +7°) the fault is intermittent. If any adaptation value is incorrect (lower than -7° or higher than +7°), the fault is permanent.

  Other information: 

  • For further information about variable valve timing control, see Variable valve timing control
  • To adjust the camshaft position (CMP) on 5-cylinder engines, see Camshaft seal/variable valve timing (VVT) unit, replacing
  • To adjust the camshaft position (CMP) on 6-cylinder engines, see Camshaft seal / variable valve timing (VVT) unit, replacing
  • To replace the camshaft reset valve on 6-cylinder engines, see Variable valve timing solenoid, replacing .
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Camshaft Position Angle

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are the adaptation values correct? 

• YES 

  Refer to Intermittent fault 

• NO 

  Refer to Checking the camshaft adjustment