If you check the car battery, starter and other common electrical components, and the vehicle still does not start, a faulty engine control unit should be the next logical thing to consider. If the problems occur intermittently, however, you might need to look into other causes, such as a bad battery or alternator – which won’t provide the level of voltage required for normal operation – or an issue with the fuses or relays in the electrical system. Bad Body Control Module? the BCM is linked to several other processors in your car (PCM, TCM, etc.) The BCM contains information which lets you know directly concerning a system that is malfunctioning and out of control. It drives all the relays the control all the nice gadgets. Even with battery change had the same problem. It communicates with all the other modules via the cars vehicle bus. Story so far, classic well documented BCM corruption after flat battery and power pack start. It also coordinates the operating functions of many non-engine related ancillary items as well as security features. Reset the BCM with tech2 and attempted to reprogram. Struggling with a 56 plate Corsa D BCM. Automotive expertise from NAPA AUTO PARTS. To keep your new BCM in the best shape possible, make sure it stays clean and dry, and protect it from unwanted shaking or excessive heat if at all possible. We are proud to offer you a first class customer service and very competitive pricing, so please browse our stock list. Back up key had not arrived yet. The benefits associated with a BCM substantially outweigh these challenges and shortcomings, however. 4. As the BCM is communicating with other control elements of your car, its accomplishments of various functions may be hindered. The Body Control Module (BCM) is the central organizational element of your car that controls other security systems of the vehicle. I had a lot of work done on my car including batttery and alternator work. so, there could be a fault in another system connected to the BCM, the BCM itself malfunctioning, or it could just be your battery. Car computer problems. the original BCM had a problem losing power to the interior lights the headlights and the key wouldn't turn the horn and power seat worked fine. Now the door locks seem to be alright but when I open car door I hear this click click click sound from the BCM area. A faulty ECM may cause the vehicle to experience a reduction in fuel efficiency, power, acceleration. © Copyright National Automotive Parts Association. This listing is for part number 22860591 BCM that is programmed/flashed for your vehicle with the newest updates from gm using your vin to match your vehicle. This is primarily because of the BCM’s miscommunication with other control systems of the vehicle. It streamlines the manufacturing and troubleshooting aspects of electronic modules by housing the modules into one, central unit instead of each function having its own device. If you cut that wire and ground the end that goes into the relay it will bypass the bcm's control over it. NO SIGNAL RESPONSE FROM CAR OR I-KEY. Can my BCM problem be a bad ground or battery cables? It is a computer, one of many on the CAN bus in our cars. The BCM, is the body computer that checks in on many of the vital systems of the car and controls theme from a centralized hub. A body control module (BCM) is a computer used to control electrical items in a car or truck which used to be controlled individually by switches. The BCM that is currently works in my car is 95410-2C710 and the BCM I bought to replace it is a 95480-2C310. A “no crank” or no start status on the engine may be observed when the BCM malfunctions. At BCM, we stock a range of used cars to suit all budgets and lifestyles so we are sure to have the right car for you. The remote was a genuine holden remote that stopped working. Usual Symptoms of Failing Body Control Module. Here’s How to Tell, Failing Oil Pressure Sensor? If your BCM begins to malfunction, you will n… Also called as “parasitic drain”, this condition is somewhat normal in your car. If there is no signal response from the Car or the I-Key, perform a CONSULT function test via CAN communication with the BCM and on the sensors, harnesses or other parts that may be the possible root cause.Refer to the Electronic Service Manual (ESM), section BCS–Body Control System, for information on checking BCM function. You can use a circuit tester to troubleshoot the electrical system yourself, but sensor issues are often best left to your local mechanic. So it sorta controls it. 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