Chrysler laser 1990 Technical Information Manual page 244

When brake pedal is not depressed
Detent pin
Shift lock pin
The shift lock device consists of the brake pedal link
mechanism and the shift lock cable. When the brake
pedal is depressed, the shift lock pin combined in
one unit with the inner cable moves into the outer
cable.
(1) Wheh brake pedal is not depressed
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When the shift lever is in the "P" position and
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the brake pedal is not depressed, the shift
cannot be operated into the position other than
the "P" position despite an effort to operate the
lever, because the shift lock pin combined with
the inner cable in one unit prevents the detent
pin movement, making it impossible to depress
the push button of the shift lever.
(2) When brake pedal is depressed
When the shift lever is in the "P" position and
the brake pedal is depressed from the released
state, the inner cable of the shift lock cable is
pulled by action of the brake pedal linkage. In
this case, the shift lock pin at the end of the
inner cable is also pulled and the detent pin is
released.
AUTOMATIC TRANSAXLE
Brake pedal link mechanism
Brake
Shift lock cable
Outer cable
When brake pedal is depressed
Therefore, the shift lever can be shifted to the
positions other than the "P" position.
NOTE
Even if the brake pedal is depressed with the
ignition key in the LOCK position or the key
removed from the ignition lock, the selector
handle cannot be shifted to the positions other
than the "P" position. (Refer to (2) Key interlock)
lever
position to "P" position
When shifting is made from the positions other
than "P" position to the "P" position, it is not
necessary to depress the brake pedal because
the detent pin moves to the "P" position while
pushing the shift lock pin. If the push buttotis
released, the detent pin moves to the
position (upward) and the return spring provided
in the outer cable returns the shift lock pin to the
state described in (1). This will fix the shift lever
in the "P" position.
Inner cable
Shift loc&