I can't find the old thread on this. But someone had similar problem before. I don't remember how he fixed it..
If you have downloaded the manual.. it is in the TG_05 section (Technical Guide). Somewhere in.. Page 05-18-5
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SHIFT-LOCK SYSTEM OPERATION
DPE051830000T03
I. Shift-lock Release Condition
• The shift-lock is released when the selector lever is
in the P position, the ignition switch is in ACC position or
ON position and the brake pedal is depressed.
II.Shift-lock Condition (When the shift-lock conditions are not satisfied)
• If the shift-lock conditions are not satisfied, electrical
current does not flow to the shift-lock solenoid. The lock
slider therefore mechanically restricts the movement of the
selector lever, preventing shifting out of Park..
Shift-lock Release Condition (when the shift-lock
conditions are satisfied)
• If the shift-lock conditions are satisfied, electrical
current flows to the shift-lock solenoid. The slider therefore
moves toward the shift-lock solenoid and the lock slider moves
to a position in which it does not restrict
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cut and pasted from the manual.:
http://www.msprotege.com/members/skyhawk/shiftlock/keyinterlock1.JPG
http://www.msprotege.com/members/skyhawk/shiftlock/shiftlock2.JPG
http://www.msprotege.com/members/skyhawk/shiftlock/shiftlock3.JPG
The illustration is not that clear.. but there is a solenoid that turns on or off
and causes the mechanism to allow/disallow movement of the shift lever.
I think the best way is to see the mechanism in action. Like
what happens when your press/release the brake. Does the
solenoid move? who knows it may just need some silicon grease
in there. It does mention the word 'slider'..