Question about Knock Learn / Minimum Noise Level

[lesmyer]

Here I have attached something from GM eSi about the PCM learning the minimum noise level for P0327 and P0332 on a 2004 Silverado 5.3. Does not ever seem to be discussed? Trying to understand how this is used and if it is a test that is attempted and updated each ignition cycle.

Doesn't seem this is the same as knock learn, since engine has to knock for that to be changed.

Sorry if this has previously been discussed. Too much on knock sensors to wade through (I tried).

How about changing the conditions to way more than 9 seconds to help prevent the code from setting? Wouldn't that potentially allow things to work normally without setting the codes? Question if this is true, is where to set and what to set it to?

------------------------------------------------------

Conditions for Running the DTC
DTCs P0117, P0118, or P0125 are not set.
The minimum noise level must be learned. The minimum noise level is learned when the
following conditions are met:
The engine coolant temperature (ECT) must be greater than 60C (140F).
The engine speed is between 475-975 RPM for 10 seconds.
The engine speed is between 1,500-3,000 RPM.
The manifold absolute pressure (Map) is less than 49 kPa.
The engine coolant temperature (ECT) is more than 60?C (140F).
The throttle angle is more than 0 percent.
The engine run time is more than 10 seconds.
The ignition voltage is more than 10 volts.

Conditions for Setting the DTC
The PCM detects that the KS signal is within the calculated voltage range or the KS signal is not
present.
The above conditions are met for more than 9 seconds.

Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive
ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time
the diagnostic fails, the control module stores this information in the Failure Records. If the
diagnostic reports a failure on the second consecutive ignition cycle, the control module records
the operating conditions at the time of the failure. The control module writes the operating
conditions to the Freeze Frame and updates the Failure Records