What does a BCM do in a car?
What does a BCM do in a car?
A BCM is defined as a computer component in a vehicle that operates, regulates and checks the vehicle’s electronic devices. When vehicles first began coming equipped with electronic devices, there existed a separate module for every device.
What happens when a BCM is turned off?
Your vehicle performance may also be affected as the BCM communicates with other control modules in the vehicle. Parasitic drain is due to components in your vehicle continuing to run after the key is turned off.
How to troubleshoot a Body Control Module ( BCM )?
Turn the radio and CD player on. Sometimes a CD player will stop playing a CD and will begin broadcasting a radio station. The frequency of these actions depends on the severity of the malfunctioning BCM. Check the fuse box if you suspect that your vehicle’s BCM is on the blink. Make sure all the fuses are in good shape.
Where is the red lead on a negative battery?
Place the red lead through the metal circle at the end of the negative battery cable. Touch the black lead to the negative battery terminal. You can use plastic clamps to secure the leads in place so your hands are free and the meter continues to operate.
What should the voltage be on a 12V Chevy Volt?
These voltage readings would be considered 100% normal for the Volt’s BCM controlled 12V charging system as it is dependent on a myriad of variables such as temperature, load demand, and basic joule counting. AGM batteries are usually never constantly charged over 14.8V.
What does a back up battery on a Chevy Volt do?
The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF.
What’s the OE number on a Chevy Volt battery?
When choosing between different batteries, go for highest reserve capacity (the number of minutes a battery can maintain a useful voltage under a 25 ampere discharge) rather than Cold Cranking Amps, or Amp Hours. GENERAL MOTORS OE Part Number: 88864595 How do I replace the battery?
Where is the battery fuse on a Chevy Volt?
Remove the battery vent hose from the battery case. It’s located on the negative terminal side of the battery toward the top center. Unlock the retaining tab on the battery fuse box cover (on the positive terminal side). Open the battery fuse box flap. Note: Pull the battery fuse box housing.
