Okay, The BCM is what controls the security light. It needs to be relearned for the security light.
The cost is very reasonable for this service. It is involved and requires a scan tool.
Roy
Bulletin No: 99-06-04-057
Date: November, 1999
INFORMATION
Subject:
Body Control Module (BCM) Related Service, Theft Deterrent Re-Learn Procedure
Models:
2000 Chevrolet Impala, Monte Carlo
BCM replacement requires that a programming function be performed. If the BCM is not properly programmed, the vehicle may not start because the Theft Lock System will be enabled.
Important:
If the module is not properly programmed within twenty (20) key cycles (including the VIN), the module will lock and programming will not be allowed. For this reason, replacing the module with a module from another vehicle will not work. They cannot be reprogrammed.
When replacing the BCM, a critical component of the procedure requires a programming of the BCM. To program the BCM, follow all of the steps in the procedure listed.
Important:
Before starting this procedure, read through it carefully and completely.
The BCM will not function properly if the "setup new" BCM procedure is not performed correctly.
Also, perform the theft deterrent re-learn procedure. If this is not performed, the following conditions will occur:
- The vehicle will not be protected against theft by the Passlock(TM) system.
- The engine will not crank or start.
Programming of the BCM requires the use of the Tech 2 scan tool.
1. Insure that the key (or ignition) switch is in the LOCK position with the ignition off.
2. Connect the Tech 2 scan tool to the Data Link Connector (DLC).
3. Turn the key to the ON position.
4. The following items all refer to the Tech 2 scan tool inputs:
Select Diagnostics and answer the questions when prompted by the Tech 2.
Select Body Control Module (BCM).
Select Special Functions.
Select New VIN and input the required data.
Exit back to the Special Functions menu.
5. Select BCM Programming.
6. Press the YES key when the following message is displayed: Do you want to setup a body control module?
7. The Tech 2 will then display the following message: Now setting up the New Body Control Module.
8. When the BCM has been setup successfully, the Tech 2 will display this message: Body Control Module setup is complete.
THIS MEANS THAT THE TECH 2 HAS SET THE BCM TO ACCEPT THE CORRECT INFORMATION. THIS IS NOT THE END OF THE PROGRAMMING PROCEDURE.
9. Exit back to the Special Functions menu.
10. Select Set Options.
11. Input all of the required data as prompted by the Tech 2.
12. Exit back to the Special Functions menu.
13. Select Option Configuration.
14. Input all of the required data as prompted by the Tech 2.
15. When the BCM, VIN, Point of Sale and option configuration have been entered, proceed with the Theft Deterrent Re-Learn Procedure.
IF THE TECH 2 DISPLAYS "UNABLE TO PROGRAM THE BCM", THE BCM IS LOCKED. TWENTY KEY CYCLES HAVE OCCURRED SINCE THE MODULE WAS INSTALLED AND VOLTAGE WAS SUPPLIED TO THE MODULE SO THE MODULE MUST BE REPLACED AND THIS PROCEDURE MUST BE REPEATED IN ITS ENTIRETY.
Important:
Programming of the BCM removes any personalization settings the customer may have previously set. Inform the customer the personalization settings will have to be reset.
Theft Deterrent Re-Learn
Important:
Perform the Theft Deterrent Re-Learn Procedure when one or more of the following conditions has occurred.
- The BCM has been replaced or re-programmed (Set-up) (Configured).
- The ignition key cylinder assembly has been replaced.
The Theft Deterrent Re-Learn Procedure can be accomplished two different ways depending on the equipment you have available.
Using The Techline equipment and the Tech 2 scan tool.
Without Techline Equipment of any kind. This procedure takes 30 minutes and must not be shortened.
USING TECHLINE EQUIPMENT AND THE TECH 2 SCAN TOOL
1. If you disconnected the scan tool from the DLC, perform the following 3 steps. If it is still connected, proceed to step 5.
2. Ensure that the key (or ignition) switch is in the LOCK position with the ignition off.
3. Connect the Tech 2 scan tool to the Data Link Connector (DLC).
4. Turn the key to the ON position.
5. From the Main Menu screen of the Tech 2, select Service Programming.
6. Enter the requested information.
7. Select Request Info.
8. When the Tech 2 finishes gathering the information, disconnect the Tech 2 from the DLC.
9. Connect the Tech 2 to the Techline terminal.
10. Select Service Programming System (SPS).
11 Select Terminal to Tech 2 programming.
12. Select Done.
13. Follow the instructions displayed on the Techline terminal for hand-held communications set-up screen.
14. Select Theft Module Re-Learn.
15. Select program at the summary screen. The terminal will now download information into the Tech 2.
16. Disconnect the Tech 2 from the Techline terminal.
17. Re-connect the Tech 2 to the DLC.
18. At the Scan Tool Main Menu, select Service Programming.
19. Answer the Tech 2 question.
20. Select Re-Learn.
21. The PCM and BCM are now prepared for the Re-Learn procedure to begin.
22. An internal security timer will now start. The security timer is 10 minutes in duration.
Important:
During this 10 minute period, the scan tool must NOT be disconnected from the vehicle.
Does the Tech 2 display any kind of message telling you to proceed?
23. Turn the ignition switch to the OFF position.
24. Start the engine. The engine should start and continue to run.
25. The Theft Re-Learn procedure is complete. Look for any DTCs which may have been set during this procedure. If codes were set, clear them now. Remove the Tech 2 from the vehicle.
WITHOUT TECHLINE EQUIPMENT OF ANY KIND
This procedure takes 30 minutes and must not be shortened.
1. Ensure that the battery is fully charged before starting this procedure.
2. Turn the ignition switch to the OFF position.
3. Rotate the ignition switch all the way to the START position then back to the RUN position. The engine will not start.
4. The security light will come on and stay on for approximately 10 minutes. When the security light goes out, proceed to the next step.
5. Turn the ignition switch to the OFF position for 5 seconds.
6. Rotate the ignition switch all the way to the START position then back to the RUN position. The engine will not start.
7. The security light will come on and stay on for approximately 10 minutes. When the security light goes out, proceed to the next step.
8. Rotate the ignition switch all the way to the START position then back to the RUN position. The engine will not start.
9. The security light will come on and stay on for approximately 10 minutes. When the security light goes out, proceed to the next step.
10. Turn the ignition switch to the OFF position for 5 seconds.
11. Rotate the ignition switch all the way to the START position then back to the RUN position. The engine will now start.
12. Using the Tech 2, look for a Clear All Trouble Codes (DTCs).
Warranty Information
For vehicles repaired under warranty, use:
Operation Labor Description Labor Time N4800 Computer (Control), Body - 0.7 hr Replace and Program
Thursday, March 28th, 2019 AT 5:25 AM
