Checking the status

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Start the engine
Read off the value for the camshaft shift angle and the desired value for the camshaft shift angle
Active the quick test of camshaft control by clicking the start button
Increase the engine speed (RPM) to approximately 2500 RPM and keep the engine running at this speed.
When the engine speed (RPM) increases, the control module will start the quick test to control the shift angle of the camshaft to the different target values. There is a fault if the control module does not operate the camshaft shift angle to the different target values.

During the quick test, check that the shift angle of the camshaft (actual value) corresponds to the target values to an accuracy of 10°. If the shift angle of the camshaft (target value) does not change, or if the actual value does not correspond to the target value, the function is faulty.

Deviation between the values can be read off in the lower display.

Carry out the check for approximately 15 seconds at an engine speed (RPM) of 2500 RPM. The test is completed when the shift angle of the camshaft returns to 0°. To restart the test, let the engine return to idle speed, then increase the engine speed to approximately 2500 RPM.

The fault is intermittent if the function is OK.

NOTE:
The test is active until the ignition is switched off. Switch off the ignition before the car is delivered to the customer.

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.