The headrest may be adjusted forward or backward by pulling the lower part of the headrest forward or backward to the desired detent in the direction of the arrow. Adjust the headrest so that it properly supports the head and neck.
Limitations of the system
The SCC may have limits to its ability to detect distance to the vehicle ahead
due to road and traffic conditions. ...
Knock Sensor (KS) Repair procedures
Removal
[Bank 1]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Remove the intake manifold.
(Refer to Engine Mechanical System - "Intake Manifold")
...