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What is a BCM

I am trying to put a key code in my car

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Lost keys to my S-10 2003 2.2L 2wd need to put in a toggle switch so I can start no security chip on key


You can jump in a toggle switch all you want ,still won't start an run . The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the 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)/vehicle control module (VCM). The message enables the fuel injectors.
Your best bet , have a mobile lock smith come an cut you a new key . Your just going to make more problems for yourself trying to jump in toggle switches .

Oct 15, 2017 | Cars & Trucks

1 Answer

How do I override the pass lock bypass on 2004 impala ss?


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.

May 26, 2017 | Cars & Trucks

1 Answer

I lost my only key to my 2000 gmc jimmy does this require a chip or is it just a regular key


No your vehicle doesn't have a chip key . You can just replace the key and lock cylinder . Without a key to copy ! Or the dealer can cut a key using the Vin #

The Passlock™ sensor is separate from the key and lock cylinder. The key and the lock cylinder work together in order to determine if the proper ignition key was used to start the vehicle.
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the 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 previousely learned voltage code. If the codes match, a class 2 message is sent from the BCM to the vehicle control module (VCM)/powertrain control module (PCM). The message enables the fuel injectors.

Feb 07, 2017 | 2000 GMC Jimmy

1 Answer

05 buick cen.Turn key and nothing nopower,panellights,radio.Nothing.Pull key out and open door chime comes on,put in and it goes off


Gremlins ! No ! You want to know how this is possible ? The ignition switch is a low voltage input to the BCM - body control module ! Going by which position you have the key in ACCY , ON , run or start . The BCM system will control relays to turn on power to different parts of the vehicle ! The place to start would be to hook up a professional type scan tool that can communicate with the BCM . Could have U codes stored in one or more of the modules on the vehicle ! Do you know what a power mode master PPM is , BCM !
BCM Functions
The body control module (BCM) performs multiple body control functions. The BCM can control devices directly connected to its outputs based on input information. The BCM evaluates this information and controls certain body control systems by commanding outputs on or off. The BCM control inputs can be:
• Sensors and switches that are directly connected to the BCM
• Class 2 serial data received from other vehicle systems connected to the class 2 serial data link.
The BCM is also capable of controlling other vehicle systems that are not directly wired to the BCM. The BCM does this by sending specific messages on the class 2 serial data link. The system capable of performing the required function will respond to the BCM message.

Your best bet would be to take your vehicle to a Buick dealer !
Power Mode Master
This vehicles BCM fuctions as the Power Mode Master (PMM). Refer to Power Mode Description and Operation for a complete description of power mode functions.

Dec 16, 2016 | 2005 Buick Century

1 Answer

My 2001chevy blazer security light came on while driving went back off after few minutes now car stalls and then want start up until hours later codes show o2sensor misfires tps and security alarm ???


What type scan tool are you using ? or are you using a code reader ? The SECRUITY -anti-theft system codes are stored in the BCM not the PCM !You need a factory scan tool or a professional grade one to check Body Control Module DTC'S -diagnostic trouble codes !
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the 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)/vehicle control module (VCM). The message enables the fuel injectors.

Aug 15, 2015 | Cars & Trucks

1 Answer

2006 Equinox. Does the key have a chip in it?


No .

Service Information
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent system is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key allows the lock cylinder to rotate. 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 serial data message is sent from the BCM to the powertrain control module (PCM). The message enables the fuel injector operation.

The design of the Passlock?"¢ system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the Passkey system. However, the Passlock?"¢ system eliminates the need for any key mounted components. The components of the Passlock?"¢ system are as follows:
The ignition lock cylinder
The ignition switch
The Passlock?"¢ sensor
The BCM
The security indicator
The PCM

Jul 18, 2015 | Chevrolet Chevy Cars & Trucks

1 Answer

I have 98 vt ex wagon V6 manual 5speed. Went to lock with remote would not lock, so key locked next morning car would wind over fire and die. Have had mechanic out and he has confirmed my security code...


sounds like the bcm may have failed, if so new bcm and new keys and programming with tech2
thats the worst case
or
wiring issue eg ignition switch
its not reading the key due to security light still flashing
the manual over ride should have worked if it didnt then i would be checking all fuses and power inputs to the bcm from the ignition switch

Sep 16, 2013 | 1998 Holden VT Commodore

1 Answer

2003 chevy s10 code p1626 no start


that is a theft deterrent code, loss of communication with the vehicle theft deterrent module (BCM), try cleaing the code if it comes back on the next key cycle you are probably going to have to replace the BCM, (bod control module)

Jan 17, 2013 | 2003 Chevrolet S-10

2 Answers

1999 jeep shuts off after 10 seconds it is cranked, the security code is p1686. Do not have a key hole on passager side or back of jeep to try to reset it. What can i try?


P1686. The engine controller recieved a invalid key.from the SKIM. It recieve information as the key is in the ignition,key hole on passenger or back will not matter.make sure you can open the vehicle with the key or keep a window down. Try this, 1. Disconnect the battery. and put terminal together(This drains capacitor in PCM and BCM) leave disconnected for 5 minutes. 2. Connect the battery. 3. Put key in ignition and turn to ACC(without cranking it) for 1 minute. Then try to start it. By doing this proceedure disconnection of the battery and reinserting it the the ignition it forces the BCM to relearn its data from the PROM. Like any computer a reboot is all it takes or restart clears the confusion on computers.

Apr 24, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Securyty ligth car dont star


ANY TIME SECURITY LIGHT COME ON YOU HAVE FAULT IN THE IGNITION KEY OR KEYS THEY COULD BE WORN OUT WHERE TO A POINT WHERE THE BCM AND PCM DONT RECOGNIZE THE CAR KEYS CAUSING NO START CONDITIONS.ALSO WORN KEY SWITCH AND BCM WILL CAUSE NO START CONDITIONS.TRY THESE TWO THINGS TRY ANOTHER CAR KEY IF STILL DONT CRANK.PUT KEY IN IGNITION TURN KEY TO ON POSITION WITH ENGINE OFF LEAVE KEY ON POSITION IN IGNITION FOR 10 MINUTES WATCH DASH SECURITY LIGHT WHEN IT TURNS OFF IN 10 MINUTES.TURN OFF IGNITION FOR 5 SECONDS THEN TRY STARTING CAR IF CRANKS OR DONT STILL THE PROBLEM IS IN THE THEFT SECURITY SYSTEM NEED TO GET DEALERSHIP TO FIX THEY HAVE DIAGNOSTIC EQUIPMENT TO FIX AND REPROGRAM THEFT SECURITY. SYSTEM.

May 25, 2010 | 1999 Oldsmobile Alero

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