Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
Guidance Screen
...
Entering a Destination
DEST button
This section describes how to enter a destination for route guidance.
Select an item.
Select DEST Menu 2 to display
additional menu entries.
The following items are avail ...
Rotor Slip Ring Test
Measure the resistance between the slip rings (A):
If the resistance is within the standard, go to step
22.
If the resistance is not within the standard, replace the roto ...