Fault-Tracing Information
Fault-tracing
Checking the status
- Read off the adaption for the camshaft, the camshaft shift angle and desired value for the camshaft shift angle.
Check that the read off values correspond to the guide values below. The difference between the camshaft shift angle and the desired value for camshaft shift angle can be read off from the lower digital display. Note the read off values as a basis for continuing fault-tracing.
Adaption camshaft
- Intake camshaft: 75 degrees CA (camshaft angle) (+/-8 degrees CA)
Camshaft shift angle
- The difference from the desired value of the camshaft shift angle (intake): approximately 8 degrees CA
The fault is permanent if the values are not correct. If the values are correct, this indicates that the fault is intermittent and not presently active.
Continue - Checking components
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Checking components
Hint: Incorrect function on the camshaft reset valve is probably the cause of this diagnostic trouble code (DTC) if:
- The adaption value and camshaft shift angle are correct in the previous check (intermittent fault).
- The adaption value is correct but the camshaft shift angle is incorrect in the previous check.
Hint: Contaminants in the engine oil can damage components in the camshaft control which can cause function faults.
Check the engine oil grade. Check especially for contaminants.
Check the default settings of the camshafts.
Remove the camshaft reset valve, check the reset valve and the oil ducts in the cylinder head. Check for contaminants and blockages.
Try a new camshaft reset valve if no fault is found or if the above remedies do not rectify the fault.
Hint: The fault can also be caused by a damaged variable valve timing (VVT) unit.
Remedy as necessary.
Other information
- To check the camshaft settings: VVT unit, B6324S5, B6304T4, B6324S4 Service and Repair
- VVT solenoid, cleaning, B6324S5, B6304T4, B6324S4 Procedures
- Location of components, B6304T4 Locations
Continue - Verification
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Fault-tracing information
Attempt New Test - Checking the status
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Verification
Verification
Verification, part 1
Hint: After carrying out the repair, check that the fault has been remedied.
In order to verify this diagnostic trouble code (DTC), adaptation of the camshaft must be completed. Adaptation of the camshaft is carried out by the engine control module (ECM) when the engine is at operating temperature, during engine braking (fuel shut-off) above 1500 rpm for at least 10 seconds.
Caution! Test driving on the road must be carried out on a road with minimal traffic. Follow the highway code.
- Ignition off
- Reconnect the connectors, components, etc.
- Start and run the engine to operating temperature.
- Drive the vehicle on the road. Ensure that the conditions for camshaft adaptation are met: engine braking (fuel shut-off) above 1500 rpm for at least 10 seconds. The conditions can be satisfied for example by driving the vehicle with a high engine load (accelerating) up to approximately 90 km/h and then releasing the accelerator pedal for 10 seconds.
Note! In order for the adaptation to be carried out, the accelerator pedal must not be touched during engine braking.
- Repeat the schedule to ensure that the diagnosis and adaptation are carried out.
- Connect VCT2000 to the data link connector without switching off the engine.
- Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list.
Note! If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated.
Check that the diagnostic status for the diagnostic trouble code (DTC) is "Completed". When the diagnostic status for the diagnostic trouble code (DTC) is "Completed", the engine control module (ECM) has carried out camshaft adaption. If the status is "Not completed" the test drive must be carried out again.
If the function is correct, the fault status must be "No fault found" when the diagnostic is complete.
Check that the value for camshaft adaption is correct when the diagnostic status for the diagnostic trouble code (DTC) is "Completed".
- Inlet camshaft: 75° CA (camshaft angle) (+/-8° CA)
Is the function OK?
Yes - Verification, part 2
No - VERIFICATION FAILED
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Verification, part 2
- Engine running.
- Check the function. Read off the shift angle of the camshaft and the desired shift angle of the camshaft.
Check that the camshaft shift angle corresponds to the desired value for the camshaft shift angle with an accuracy of approximately 8° CA (camshaft angle). The difference between the values can be read off in the lower digital display.
Is the function OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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