Chevrolet 1998 Prizm Owner's Manual page 326

Brake-Transaxle Shift Interlock (BTSI) Check
(Automatic Transaxle)
Ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to
LOCK
in each shift lever position.
r
With an automatic transaxle, the key should turn to
LOCK only when the shift lever is in PARK (P).
LOCK only if you push the key in farther, while
turning it towards LOCK.
When you are doing this check, the vehicle could With a manual transaxle, the key should turn to
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake (see "Parking Brake"
in the Index if necessary).
NOTE: Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the key to the ON position,
but don't start the engine. Without applying the
regular brake, try to move the shift lever out of
PARK (P) with normal effort. If the shift lever
moves out
of
PARK (P), your vehicle's BTSI
needs service.
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