Question about 1999 Oldsmobile Alero

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We installed a new ignition switch and now we need to perform the BCM theft deterrent relearn. We do not have a dealership here[in North Pole, AK] to take the vehicle to.

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  • kathymcaulay Sep 05, 2010

    We have resolved our problem without using a scan tool. Once the new lock cylinder is installed, the car will turn over but not start becaue the security system blocks fuel flow. All you have to do is put the key on the "on" position and leave it there for approximately ten minutes until the Theft system turns off. This allows the BCM to "relearn" the password.

  • Anonymous Mar 31, 2014

    I bought a new BCM and I need to reprogram it

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Hi! Alright, please try this. Open the hood and remove the positive battery connector. Let it sit for atleast 5mins. After 5mins. put the connector back again. Turn on the ignition key but don't start the engine. Let it on for 10 secs. then turn it off and remove the key. Insert the key again then turn it on for 10secs. after 10secs. start the car. Try it and see how it goes. Hope this helps and thank you for using FixYa!

Posted on Sep 05, 2010

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You will require the tool to do that. NOTE You must use a scan tool to perform the BCM theft deterrent relearn procedure whenever you replace the ignition switch lock cylinder.

  1. Disconnect negative battery cable.
  2. Remove instrument panel (I/P) accessory trim plate.
  3. Insert the key to the ignition lock cylinder.
  4. Remove the ignition lock cylinder from the switch:
    1. Using a small curved tool or an L-shaped hex wrench, depress and hold the detent on the ignition lock cylinder. If you cannot locate the detent with the tool, remove the radio. View the detent through the radio opening.
    2. Turn the key to the ON/RUN position.
    3. Pull the ignition lock cylinder out with the key.
  5. Remove the key from the lock cylinder.
  6. If the cylinder does not rotate or is seized, follow the procedure in the ignition switch replacement.

To install:
  1. Insert the key and turn the lock cylinder to the ON/RUN position.
  2. Install the lock cylinder to the ignition switch. If you turned the key slightly while removing the lock cylinder, you may have to align the white colored ignition switch rotor (1) with the lock cylinder (2). You can rotate the ignition switch rotor (1) with your finger.
  3. Turn the key to the OFF position and remove the key.
  4. If necessary, install the radio.
  5. Install the I/P accessory trim plate.
  6. Connect the negative battery cable.
  7. If a new lock cylinder was installed, perform the BCM theft deterrent relearn procedure.
You can get required tool from:--- www.autozone.com or from near by car parts store locally. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

Posted on Sep 04, 2010

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1 Answer

Do bcm need to be reprogramed


Has to be programmed ,yes .
Body Control Module (BCM) Replacement
If the BCM is replaced, the following procedures must be performed in the subsequent order:
• BCM Reprogramming--Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems for replacement, setup, and programming.
• Theft Learn--Refer to Programming Theft Deterrent System Components in Theft Deterrent.

A new body control module (BCM) must be programmed with the proper regular production option (RPO) configurations. The BCM stores the information regarding the vehicle options and if the BCM is not properly configured with the correct RPO codes, the BCM will not control all of the features properly. The Tech 2 software will automatically prompt you with the RPO available for the vehicle. Ensure that the following conditions exist in order to prepare for BCM programming:
• The battery is fully charged.
• The ignition switch is in the ON position.
• The data link connector (DLC) is accessible.
• All disconnected modules and devices are reconnected before programming.
To setup a new BCM, access the Vehicle Control Systems in Computer/Integrating Systems menu on the scan tool to program the BCM. Select Module Replacement/Setup and follow the instructions on the scan tool.
If the BCM fails to accept the program, perform the following steps:
• Inspect all BCM connections.
• Verify that the scan tool has the latest software version.

Aug 31, 2017 | Cars & Trucks

1 Answer

I removed my alarm system keystartremove n now want start 98 old cultass 3.1 engine


You can't do that an expect the vehicle to start , software programmed in the computer system . If the engine PCM doesn't see a pass word or coded message from the BCM or anti-theft module . IT will disable starting and or fuel injetor control .
Important: Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair.
All codes in the theft deterrent module must be cleared for a relearn.
The vehicle theft deterrent system is designed in order to prevent vehicle theft by disabling the fuel injectors unless the lock cylinder is correctly engaged by a mechanical key. The theft deterrent system uses the following 4 components for theft prevention:
• The lock cylinder
• The ignition switch
• The body control module (BCM)
• The powertrain control module (PCM)
When starting the engine, the PCM searches for a password from the BCM through the Class 2 serial data circuit. If the password is not recognized or not present, the PCM will disable the engine. Two modes of tamper detection are provided:
• No password received
The engine will start and stall quickly. SECURITY telltale will flash on the instrument panel cluster (IPC) and then stay ON steady.
• Incorrect or disable password received (More than 3 invalid passwords are received)
The engine is disabled for at least 10 minutes and the SECURITY telltale will illuminate solid on the IPC during the 10 minutes.
After the vehicle has passed theft detection, the PCM will continue normal operation.

They do sell by pass modules you can find on the internet , in some cases it cheaper to have it fixed proper by a qualified repair shop . It just depends what the original problem was . You how ever just complicated matters by changing thing's .

Jan 08, 2017 | Oldsmobile Cutlass Cars & Trucks

2 Answers

What tools are needed to replace BCM?


Important: Perform new BCM setup when you replace Body Control Module (BCM). Refer to Body Control Module (BCM) Programming/RPO Configuration .
Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
Remove the left instrument panel insulator. Refer to Instrument Panel Insulator Replacement in Instrument Panel, Gauges and Console.
Disconnect the BCM electrical connectors.
Push the BCM up and move the bottom of the BCM away from and out of the mounting bracket slot in order to remove the BCM.
During Body Control Module (BCM) related service, the procedures below are designated to set-up the BCM correctly. Before you start, read these procedures carefully and completely.

Setup New Body Control Module (BCM)
Tools Required
Scan Tool (Tech 2) GM factory scan tool !
Important:
• Read this procedure carefully and completely.
• The BCM will not function properly if the Setup New BCM procedure is not performed.
• Perform the Theft Deterrent Re-learn procedure after successfully finishing the Setup New BCM procedure. If the Theft Deterrent Re-learn procedure is not performed after a BCM replacement, the following conditions may occur:
- The vehicle will not be protected against theft by the PASSLOCK system.
- The engine will not crank nor start. Your best bet is to take your vehicle to a dealer or a ASE certified repair shop who has proper tools .

Feb 16, 2016 | 2000 Oldsmobile Intrigue

1 Answer

After completing the 45 minute relearn procedure for a 2004 Pontiac Grand Prix message center Now says system not programmed


Relearn for what ? Anti theft system PK3 ? The relearn procedure is three 10 min. procedures for a total of 30 min.
30-Minute Relearn Procedure
Use this procedure after replacing the following components:
?€¢
The passkey III (PK3) keys


?€¢
The BCM


?€¢
The PCM, see important above

Important: This procedure is not available on vehicles equipped with option code (Z49).
If replacing a BCM with an GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 30-minute relearn procedure.

  1. With a master passkey III key, turn ON the ignition, with the engine OFF.
  2. Observe the STARTING DISABLED DUE TO THEFT message on the drivers information center (DIC), after approximately 10 minutes the STARTING DISABLED DUE TO THEFT message on the DIC will turn off.
  3. Turn OFF the ignition, and wait 5 seconds.
  4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
  5. Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
  6. With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
  7. With a scan tool, clear any DTCs.

Dec 07, 2015 | Pontiac Cars & Trucks

1 Answer

Where is the alarm located on an 2006equinox


What alarm ? Anti-theft ?
The theft deterrent system on this vehicle is comprised of 2 separate systems, the Vehicle Theft Deterrent (VTD) System and the Content Theft Deterrent (CTD) System. The VTD prevents drive away theft by preventing the vehicle from starting. The CTD is the vehicle alarm system which discourages unauthorized entry into the vehicle. These systems are described and diagnosed separately within this section.
SECURITY Indicator
The SECURITY indicator on the instrument panel cluster (IPC) is controlled by the body control module (BCM) through the security indicator control circuit.
?€¢
The Vehicle Theft Deterrent (VTD) System contained in the BCM commands the instrument cluster to control the SECURITY indicator only when the ignition switch is ON. The VTD System uses the telltale as a malfunction indicator.


?€¢
The Content Theft Deterrent (CTD) System also contained in the BCM commands the instrument cluster to control the indicator only when the ignition switch is OFF. The CTD System uses the SECURITY indicator to identify system status.


It's software , a program inside the BCM ! An you can't just replace the BCM , it needs programming ! The dealer is the place to have that done ,most of the time ! If there is a SECRUITY light lit on the dash ,there is a DTC - diagnostic trouble code stored in the BCM , this code will point the service technician in the diagnostic path !

Oct 02, 2015 | Cars & Trucks

1 Answer

Location of body contol senser on a 97buick century limited


Do you Body Control Module ? It's below left side of instrument panel . What type of problem are you having ? You can not change a BCM for another one
Important:

• Read the BCM set-up procedures carefully and completely.

• The BCM will not function properly if the Setup New BCM Procedure is not performed.

• Perform the Theft Deterrent Re-Learn procedure after successfully finishing the Setup New BCM Procedure. If the Theft Deterrent Re-Learn procedure is not performed after a BCM replacement, the following conditions may occur:

- The vehicle will not be protected against theft by the PASS-Key® II system.

- The engine will not start !!!!!!

Dec 09, 2014 | Cars & Trucks

1 Answer

How to reset security light after installing a new ignition switch


Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair.

You must perform a theft relearn procedure if any of the following components have been replaced:

  • Passlock sensor
  • Body control module (BCM)
  • Powertrain control module (PCM)
The above modules, with the exception for the Passlock Sensor must also be programmed with each module's own vehicle configuration.

Auto Learn:

Time required, approximately 10 minutes.

  1. Insure that the battery is fully charged.
  2. Use the scan tool in order to clear the DTCs.
  3. Turn the ignition switch from the OFF position to the CRANK position attempting to start the vehicle. The vehicle will start and then stall.
  4. Leave the ignition switch in the ON position while observing the security indicator.
  5. When the security indicator turns off, which can take up to 10 minutes, turn the ignition switch off. Wait 10 seconds.
The BCM and the PCM will learn the new code on the next start attempt.

Jul 17, 2011 | Chevrolet Silverado 1500 Cars & Trucks

3 Answers

2005 Chevy Impala ignition switch stuck in off position


Someone may have tried to steal the car and damaged the lock's internal pins. Replace the entire lock with new.

Sep 08, 2009 | 2005 Chevrolet Impala

5 Answers

Diagram on a pontiac grand prix


I have 07 Pontiac Grand Prix, the wrong key was inserted into the ignition the other day. Now when I try to use the correct key it will not insert completly in the ignition, goes in until last 1/4in of key. Im stuck, I bought the new lock cylinder but how do I get the old one out? I cant get the key to insert all the way so I cant get it to the "On" position, it will not turn at all. The key that was inserted in error is whole and nothing is missing it seems like there is something stuck. Any help would be appreciated...

Sep 09, 2008 | 2000 Pontiac Grand Prix

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