Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Checking the status
- 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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.