Symptoms - Automatic Transmission Shift Lock Control. Buick Century 2000

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2000 🢒 Century 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Symptoms - Automatic Transmission Shift Lock Control

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to LINK. Automatic Transmission Shift Lock Control Description

•	Inspect for aftermarket devices which could affect the operation of the Brake Shift Interlock Control System. Refer to Checking Aftermarket Accessories in Wiring Systems.

•	Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step	Action	Value(s)	Yes	No
Schematic Reference: Shift Lock Control Schematics DEFINITION: This table will test a operation of the automatic transmission shift lock control system
1	Did you review the automatic transmission shift lock control description and perform the necessary inspections?	--	Go to Step 2	Go to Automatic Transmission Shift Lock Control Description
2	Verify the fault is present. Does the system operate normally?	--	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Turn ON the ignition, with the engine OFF. Press and hold the brake pedal. Attempt to move the shift lever out of the PARK position. Does the shift lever move out of the PARK position?	--	Go to Step 4	Go to Automatic Transmission Shift Lock Control Always On with Ignition in Run
4	Release the brake pedal. Block the wheels and apply the parking brake. Attempt to move the shift lever out of the PARK position. Does the shift lever move out of the PARK position?	--	Go to Automatic Transmission Shift Lock Control Inoperative	Go to Testing for Intermittent Conditions and Poor Connections