1998 Chevrolet 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 leverposition. With an automatic transaxle, the key should turn to LOCK only when the shift lever is PARK (P). in With a manual transaxle, the key should turn to LOCK only if you push the key in farther, while turning it towards LOCK. r 7-40 Whenyouaredoingthischeck,thevehiclecould move suddenly. If it does, you or others could be injured. Follow the steps below. 1. Before you start, be sureyou have enough room around the vehicle. It should beparked 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 engine. Without applying the the regular brake, try to movethe shift lever out of PARK (P) with normal effort. If the shift lever moves out of PARK (P), your vehicle's BTSI needs service.