How to reset the battery monitor system

Understanding how to reset the battery monitor system is so important. It determines the battery's condition and provides information to other systems that manage the charging rate and battery saver. A battery monitor system is needed for proper engine shutdown in parts of the system to prevent the system's failure when exerting its capacity.

Resetting the battery monitor system will get rid of the ascertained battery information, the battery period of use. It will alter the aging computation process, which has been discovered since the installation of the battery. Battery Monitor reset should be done when the battery is replaced with a new battery.

Furthermore, it is very important to perform a battery monitor system reset if a vehicle battery is being replaced. Lastly, the battery monitor system tracks the state of your battery charge and age. If the battery monitor system is not reset, it will reserve the old battery features and consider a new battery like an aged battery.

This mishap may lead to inadequate charging, which can bring about reduced life of the battery. These are some steps to reset the Battery monitor System

DIY Battery Monitor System Reset

Switch Ignition on

Don't start the engine
Pull and release Headlight flasher five times
Press and release the Brake pedal three times
If successful, the Battery indicator light will flash three times within 15 seconds. The battery Monitor system reset is complete.

Put Ignition on

Don't start the engine
Press the fog light button ten times
Then hazard button ten times
The battery indicator lamp will flash, meaning it's successful.

Put Ignition on

Don't start the engine
Put Sidelights on
Press the Fog light button five times
Then Press Hazard 3 times
The battery indicator will start blinking, meaning .you have reset the battery Monitor System.

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How to Reset Battery Monitor System Without using computer

Turn on the car without starting the engine.
Push the fog lamp button ten times ON>OFF>ON>OFF>ON>OFF>ON>OFF>ON> OFF
Push the hazard flasher button ten times.
Turn off and turn back on without starting the engine,

Take note of the battery indicator on the speedometer. If it blinks three times, the battery monitor system is reset. If not, try again. This procedure works for Kuga and Focus from 2013 up.

It is worthy of note that the only way to test if these manual methods of resetting the battery monitor system work are to check with Forscan after trying one of these methods to see if the battery days of service have reset back Zero.

Reset Battery Monitor System with Forscan

Forscan is a software scanner for Ford, Mazda, Lincoln, and Mercury vehicles, intended to operate over ELM327 and J2534 run via well-suited adapters. After replacing the battery, you can reset the battery monitor system using a Forscan. See the latest software here.

To reset the Battery Monitor System, you need a bbfly-BF32302 USB OBD-II Scan Tool. You can purchase it from AliExpress or Amazon. See link here. It uses a Future Technology Devices International Ltd (FTDI) chip. It comes with a USB driver CD, or you can download the latest USB driver from Future Technology Devices International Ltd (FTDI). See link here

‍Furthermore, in the case where the bbfly-BF32302 USB OBD-II Scan Tool comes without a driver disc, you can install the driver using a laptop. Plug adapter to the laptop, connect to the internet. Windows will automatically find the device and install a driver "FT232R USB UART".

The device is ready to go. You don't need to install any other driver. To reduce the chances of a failed installation, you can follow the installation guide at the FTDI chip website, download the CDM21228_setup.exe file, run it as administrator then follow the instructions in FTDI.

After the installation, in windows device manager, you will see: Ports (COM & LPT): USB Serial port (COM3):Universal Serial Bus controllers have a USB serial converter. Go to the Forscan website, download and install Forscan for the windows free version.

Then connect the BF32302 to your vehicle (for this particular method, it is for Ford Escape)A box on the driver's side is marked as OBD II, near the driver's left knee. Open the box and plug the adapter in

Step-by-step process

Start Forscan on your laptop. Insert car key and turn to “On” position. Don't start the engine. In Forscan, select vehicle (the first icon on the top left), then click connect icon at the bottom left.

Connect Forscan to the vehicle, follow instructions in ForScan. After Forscan finds all modules, click the service functions (the wrench icon). Click "BdyCM: Battery monitoring system reset. "Click the play button at the button left #Follow the on-screen prompts. When it is finished, Forscan will report that BMS was successfully reset. Check/clear any DTCs. Disconnect Forscan from vehicle

FREQUENTLY ASKED QUESTIONS ABOUT BATTERY MONITOR SYSTEM RESET

I disconnected my battery countless times and didn't have to reset anything, so what is the battery monitor system Reset?

The answer to such a question is that the battery monitor system reset is done when the old battery is replaced with a new battery.This answer is important because the old battery data and capacity will be erased to accommodate the new one.

Suppose the Battery monitor system is not done when replacing an old battery with another one. Therefore, the battery will be reading the new battery's data as an aged battery.

What do I do when the battery monitor system reset fails?

A customer replaced his original battery with an OEM replacement at 55,000 miles. His ford dealer did not reset his battery monitor system.Howbeit, he probably didn't know it even had a Battery monitor system. He replaced his original battery as the battery state of charge was consistently dropping, and charging it back up with a battery charger wasn't helping.

The battery state of charge had always run about 80% or higher. Before replacement, it was running below 60%. After replacing the battery, it was back above 80%. He stopped paying attention to the battery state of charge until after a (Rear drive unit) RDU replacement.

Then the car had 64,000 miles on it. When the car was not in use, he frequently put a trickle charger on the car. After the rear-drive unit replacement, the battery state of charge would not go above 55% when it is not in use. The charger would appear to be charging the battery starting at about 10amps and dropping to near zero.

But at best, the battery state of charge would read only 58%.He did the battery monitor system reset, and he used the flash headlight five times and three times brake pedal. He waited for about 10-12 seconds before the battery light flashed twice.

When he checked the battery state of charge, it was at 65%. It was better but not what it should be. So, he power-cycled and checked again. The battery state of charge was 89%. Without the reset, he wouldn't get a correct reading.

How to verify the integrity of a Battery Monitor System Connector?

You can close a visual inspection of the small plug and wires. If in doubt, replace the plug and wire ends with a relatively inexpensive pigtail sold for that purpose.

How to know you've successfully reset Battery Monitoring System Using Forscan and a Bluetooth Veepeak OBDII?

When purchasing a new OBD2 device, ensure to get one of the known compatible devices listed on the Forscan website rather than speculating with a cheap one. If you own an OBD2 device and a Forscan lite, connect the OBD2 device from Forscan, Select service from the main screen of Forscan Lite.

From the service screen, select battery monitor system reset and then tap the play button. There will be a log showing that you've completed the battery monitor system rest. The Battery monitor system value "Battery Age" should report as zero, showing a valid reset. According to Ford owner's manual:

After battery replacement, or in some cases after charging the battery with an external charger, the battery management system requires eight hours of vehicle sleep time to relearn the battery state of charge.

During this time, the vehicle must remain fully locked with the ignition switch. Before relearning the battery state of charge, the battery management system may temporarily disable some electrical systems.

Does this imply that if the car is kept in the condition listed above for a minimum of 8 hours, that Battery monitor system reset is not necessary?

Or if the car is left locked for 8 hours or more, it will relearn the battery state, thus resetting the Battery Monitor System?The owner's manual is silent on this, but the WSM; WAVE (Wireless Access in a vehicle Environment) short message is not. The short wave message clearly states that a battery monitor reset is required on a new battery installation.

Furthermore, the owner's manual procedure represents the time needed for the monitor to update charging; For example, when using a battery tender to top off the battery when driving, mileage and conditions are very low.

You will observe this behavior by checking the battery charge via gage on the battery and reading the reported state of charge just after the charge finished from the car's computer using the OBD2 port and a reader.

Key Takeaway

The battery monitor system tracks the state of your battery charge and age.
Battery Monitor reset should be done when the battery is replaced with a new battery.
If the Battery monitor system is not done when replacing an old battery with another one, the battery will be reading the new battery's data as an aged battery.
Without the battery monitor system reset, he wouldn't get a correct reading of your battery data.
The Battery monitor system value "Battery Age" should report as zero, showing a valid reset.

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