Terminology help, cam shaft angles Topic is solved

[MattaClark]

Hey all,
I was hoping someone knowledgeable could give me a good glossary for some of the terms used in VIDA to monitor the camshaft angles:

1. Camshaft, shifting angle °
2. Nominal camshaft shifting angle °
3. Camshaft shifting angle deviation °
4. Camshaft reset valve %
5. Camshaft adoption °

Thanks!

[MattaClark]

Ah nevermind! Discovered the glossary.

Reset valve camshaft, intake / exhaust (CA)
Measurement range: 0-100%
The pulse ratio transmitted by the engine control module (ECM) to control the camshaft reset valve.
The value indicates control of the camshaft reset valve to control the camshaft position (angle).
The normal value when the camshaft is deployed and in the fixed position is approximately 50%.
The value increases/decreases depending on control of the camshaft.


Camshaft shift angle, (intake/ exhaust) (°)
Measurement range: between -256 CA and +256
CA.
The engine control module (ECM) calculates the value by comparing the position of the camshaft with the position of the crankshaft. The value indicates the angle of the camshaft. This is the offset of the camshaft 0 position in relation to the crankshaft TDC (0). (The camshaft 0-position = the set alignment of the camshaft position with the crankshaft.)

Desired value for the camshaft shift angle, intake/ exhaust
Measurement range: between -256 CA and +256
CA.
The value indicates the target value of the engine control module (ECM) for "Camshaft shift angle
" (actual shift angle). The "Desired value for the camshaft shift angle" can be altered by changing the engine speed (RM)/load.

Camshaft shift angle leeway, intake/ exhaust Measurement range: between -256 CA and +256 CA.
The value indicates the difference between the
"Camshaft shift angle" (actual shift angle) and the desired value for the camshaft shift angle (target value for the engine control module (ECM)).
Changing the "Camshaft shift angle" is achieved by changing the engine speed (RPM)/load. The normal value varies depending on how far the camshaft is operated and the temperature/grade of the engine oil, although the value must never deviate by more than between 10 degrees for longer than approximately 4 seconds.


Camshaft adaptation, intake/exhaust (CA)
Measurement range: between -511 to +511 degrees.
The value indicates the camshaft deviation from the basic setting.
The value is 0 degrees when the camshaft position (angle) corresponds with the crankshaft position (angle). Normal value is 0 degrees +8 degrees.
The value is updated following adaptation of the camshaft position (angle position). The adaptation is performed when the camshaft control is not active (fully returned camshaft).

[Shawnmalik12]

Hi,

Thank you for posting the glossary, I am currently dealing with a P001692 CEL issue and having a hard time understanding the adaption for camshaft, the camshaft shift angle, and desired value for the camshaft shift angle.

The fault tracing guide in VIDA says the following:

Adaption Camshaft
- Intake camshaft: 54 degrees CA (camshaft angle (+/- degrees CA)

Camshaft shift angle
- The difference from the desired value of the camshaft shift angle (intake): approximately 8 degrees CA

I will attach screenshots of the test I ran and the values I got back below. You may have a better understanding of this than me so I would really appreciate if you could let me know if the values look off.

Screenshot 2025-03-29 122123.png (57.7 KiB) Viewed 4442 times

Screenshot 2025-03-29 122051.png (36.86 KiB) Viewed 4442 times