Does bcm control the a/c system on 2004 dogdestratus

Programming Theft Deterrent System Components
Important: When replacing a body control module (BCM) with an GM Service Parts Operation (SPO) Replacement Part, set up the replacement BCM prior to the 10-minute relearn procedure or the 30-minute relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Important:
• When replacing a BCM with an GM SPO Replacement Part, the module will learn the keys immediately. The existing powertrain control module (PCM) must learn the new fuel continue password when you replace the BCM.
• When replacing a PCM with a GM SPO Replacement Part, the new PCM will learn the incoming fuel enable password immediately after programming and upon receipt of a password message. A PCM which had been installed in another vehicle would have learned the fuel enable password of the other vehicle's BCM. Perform either the 10-minute relearn procedure or the 30-minute relearn procedure to learn the fuel enable password of the current vehicle's BCM.
• When performing either relearn procedure, all previously learned keys will be erased from the BCM memory.
• Additional keys may be learned. Refer to Adding Keys .
Tools Required
• Scan tool
• Techline Terminal with current Service Programing System (SPS) software
10-Minute Relearn Procedure
Use this procedure after replacing the following components:
• The passkey III (PK3) keys
• The BCM
• The PCM, see Important above
Important: If replacing a BCM with a GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 10-minute relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Connect a scan tool to the vehicle.
Turn ON the ignition, with the engine OFF.
Insure that all power consuming devices are turned OFF on the vehicle.
With a scan tool, select Request Info. under Service Programming System and follow the scan tool on-screen instructions.
Disconnect the scan tool from the vehicle and connect the scan tool to a Techline Terminal with the current Service Programming System (SPS) software.
On the Techline Terminal, select Service Programming System and follow the Techline Terminal on-screen instructions.
Disconnect the scan tool from the Techline Terminal and re-connect the scan tool to the vehicle.
With a master passkey III key, turn ON the ignition with the engine OFF.
With a scan tool, select Program ECU under Service Programming System.
At this point the scan tool must remain connected for the duration of the 10-minute relearn procedure.
Observe the scan tool, after approximately 10 minutes the scan tool will display "Programming Successful, Turn OFF Ignition". The vehicle is now ready to relearn the key information and/or the passwords on the next ignition switch transition from OFF to ON.
Turn OFF the ignition and wait 5 seconds.
With a master Passkey III key, start the vehicle. The BCM has now learned the key transponder information and the PCM has now learned the fuel continue password.
Important: Perform this step ONLY on vehicles with EXPORT configured BCM's.
Turn OFF the ignition and wait 15 seconds minimum.
Important: Perform this step ONLY on vehicles with EXPORT configured BCM's.
With a second master passkey III key, start the vehicle. The BCM has now learned the second master Passkey III key transponder information
With a scan tool, clear any DTCs.
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.
With a master passkey III key, turn ON the ignition, with the engine OFF.
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.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
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.
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.

Mmmmm.... start here:
2005 saturn vue bcm reprogram Google Search

and this:
http://www.saturnfans.com/forums/showthread.php?t=195610

See this:
2004 saturn bad body control module

then here:
Saturn BCM body control module Removal

Try these YOUTUBES... NOT the same year:
2004 saturn bad body control module

2002 Saturn Veu BCM issue and quick fix
(this MAY help you)?

Anthony

Probably the switch input to the BCM is bad . door ajar switch .
The BCM is also capable of commanding other vehicle systems to control functions that are not directly wired to and/or controlled by the BCM. The BCM accomplishes this task by sending specific messages on the class 2 serial data link. The vehicle system capable of performing such function will respond to the BCM message.
The BCM controls/monitors the following functions:
• Audible warnings
• Indicators control
• Interior lighting
• Exterior lighting
• Power/automatic door locks
• Keyless entry
• Content theft deterrent
• Personalization
• Serial Power Modes
• Electrical Power Management

Audible Warning
The body control module (BCM) provides the following audible control functions. Some audible control functions may be controlled by other systems through the class 2 serial data link:
• Headlamp on reminder
• Key in ignition reminder
• Personalization mode
• Delay locking indication
• Keyless entry programming/diagnostic mode indication

Indicator Control
The body control module (BCM) provides the following indicator control functions through the class 2 serial data circuits. Some indicator control functions may be controlled by other systems through the class 2 serial data link:
• Door ajar
• Liftglass/endgate ajar
• Park brake
• High beam
• Park lamp malfunction
• Service vehicle soon
• Personalization mode
• Security LED
• Battery

Door Locks Go Crazy 1
Door Locks Go Crazy 2
Door Locks Go Crazy 3

You can't ! Dealer maybe able to , going into the BCM with factory scan tool an turning it off !
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent system prevents the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the ignition lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock™ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM). The message enables the fuel injectors and the crank relay.

Backup Lamps
The TURN SIG fuse in the console fuse block supplies battery positive voltage to park neutral position switch. When the gear selector lever is in the REVERSE position, power is supplied to both of the backup lamps. The backup lamps are grounded at G401 and G402.
Do you know what DTC'S - diagnostic trouble codes are ?
DTC B2552
The body control module (BCM) controls the backup lamp relay. The BCM grounds the backup lamp relay control circuit energizing the backup lamp relay. The BCM connects directly to the center console fuse block with no external wiring between them.
DTC B2553
The body control module (BCM) controls the backup lamp relay. The BCM grounds the backup lamps relay control circuit energizing the backup lamp relay. The BCM connects directly to the center console fuse block with no external wiring between them.
Backup Lamps Always On

1. Turn ON the ignition.
2. Shift the gear selector lever to the REVERSE position and then to the PARK position.

Do the backup lamps turn on in REVERSE and turn off in PARK?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3

3

Remove the backup lamps relay.
Do the backup lamps turn OFF?
Go to Step 5
Go to Step 4

4

Repair a short in the backup lamps relay switched battery positive voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?
Check the back-up lamps relay #45 in the center console fuse/relay box .
Fuse Block - Center Console
Inside of console, behind the right console access panel

Check

The answer to your question is no, The BMC controlled directly by the BMC are.
1. Power door lock system
2. Remote keyless entry system
3. Power window system
4. Sunroof
5. Interior room lamp
6. Warning chime
7. Turn signal and hazard warning lamps
Configuration EKS00777
DESCRIPTION
U1000
CONFIGURATION has two functions as follows:
? READ CONFIGURATION is the function to confirm vehicle configuration of current BCM.
? WRITE CONFIGURATION is the function to write vehicle configuration on BCM.
CAUTION:
? When replacing BCM, you must perform WRITE CONFIGURATION with CONSULT-II.
? Complete the procedure of WRITE CONFIGURATION in order.
? If you set incorrect WRITE CONFIGURATION, incidents will occur.
? Configuration is different for each vehicle model. Confirm configuration of each vehicle model.
READ CONFIGURATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.

This came right out of the 2004 titan manual don't think it's the answer you wanted to hear.

Automatic Transmission Shift Lock Control Description and Operation
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of thew following components:
• The automatic transmission shift lock control solenoid
• The body control module (BCM)
• The powertrain control module (PCM)
With the ignition in the ON position, battery positive voltage is supplied to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid receives a ground from the BCM. When the automatic transmission shift lock control solenoid is energized, the shift lever mechanically locked in the PARK position. When the driver presses the brake pedal the PCM sends a class 2 serial data message to the BCM. The BCM turns OFF the ground control circuit and this de-energizes the automatic transmission shift lock control solenoid. When the automatic transmission shift lock control solenoid is de-energized, the shift lever may be moved out of the PARK position. The BCM determines transaxle shift lever position through a class 2 serial data message from the PCM. The PCM receives inputs from the park/neutral position switch and determines shift lever position. When the BCM receives this information and determines that the shift lever is out of the PARK position, the automatic transmission shift lock control solenoid ground is opened.

Do you know what a DTC is ? Diagnostic trouble code !

DTC B2708
The body control module (BCM) controls the automatic transmission shift lock control solenoid. Positive voltage is supplied via the ignition 1 voltage circuit to the automatic transmission shift lock control solenoid. The BCM controls the ground circuit of the automatic transmission shift lock control solenoid . When the brake pedal is depressed, the BCM removes the ground allowing the solenoid to disengage. This action allows the vehicle to be shifted out of the PARK position.
Conditions for Running the DTC
DTC B2707

Your best bet mite be to have a qualified repair shop check it .

How would you like it if you replaced the switch an that wasn't the problem ? That is very possible without knowing for sure if that is the problem . Testing the electrical supply to the switch an out of the switch is the proper way to diagnose this problem. Plus the ignition switch is just a input to the BCM - body control module . The BCM is really in charge of what mode to put the vehicle in . Your best bet , take it to a qualified repair shop .

The body control module (BCM) has a bussed electrical center integrated into the housing. Body control relays and fuses are installed directly on the BCM, which simplifies wiring and junction blocks on the vehicle. The body control system consists of the BCM and its associated controls. Battery positive voltage is provided to the BCM from IBCM BATT 1 fuse and the IBCM BATT 2 fuse in the underhood fuse block. The module grounds are wired to ground G201, G203 and G305. The BCM is wired to the GMLAN High speed serial data buss, and the GMLAN Low speed serial data buss, as well as discrete input and output terminals to control the functions of the vehicle's body .
Serial Data Gateway
The body control module (BCM) in this vehicle functions as a translator between the High and Low speed GMLAN busses. The 2 communication protocols use the BCM to translate communicated serial data messages between the control modules over the 2 serial data busses.

Normal vehicle serial data communications and the control modules operations will not begin until the system power mode has been identified. Discrete wires from the ignition switch contacts are monitored by a module which acts as the power mode master (PMM) in order to determine the correct power mode. The module which is the PMM communicates the system power mode to all modules on the serial data lines. Refer to Body Control System Description and Operation to identify which module is the PMM and the applicable power mode look up table.

The one that said you may need an ignition switch has no clue as to what's up !
Install a scan tool.
Turn OFF the ignition.
With a scan tool, under Vehicle Control Systems, Computer/Integrating Systems, BCM Data menu observe the Power Mode parameter.
Does the displayed power mode parameter match the actual ignition switch position?
Go to Step 2
Go to Step 6
2
Turn the ignition switch to the UNLOCK position.
With a scan tool, under Vehicle Control Systems, Computer/Integrating Systems, BCM Data menu observe the Power Mode parameter.
Does the displayed power mode parameter match the actual ignition switch position?

The interior light are controlled by the Body Control Module (BCM).
Check the fuse for the BCM. If the fuse is OK, then try to disconnect the car battery for about 10 minutes to reset the BCM. If resetting the BCM doesn't work you may have to replaced it.

Remote control door lock reciver an the BCM - body control module control the locks . The key switch is a electrical input to the BCM , the BCM controls the door lock actuators . Your best bet ,have it towed to the dealer .