Where is the Ignition distributor engine speed input circuit located?

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The P0320 code on a 2005 Hyundai XG350 is related to the ignition/distributor engine speed input circuit malfunction.

So, this is related to the crankshaft angle sensor or the wiring headed to the sensor which it is common for the timing belt to come apart and damage the wiring to the sensor, either way the timing belt cover must be remove so you can get at the sensor for inspection, if the wiring is okay I would replace the sensor. Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.