Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Calibration Procedure
To complete the Battery Sensor Module calibration, there must be no significant parasitic electrical drain on the battery. If the parasitic electrical drain does not remain below 100 mA during vehicle rest, the calibration will not be completed successfully and the Stop/Start system may not operate. Refer to Battery Electrical Drain/Parasitic Load Test
Starting with 2017 model year vehicles with Stop/Start, a new feature called Power On Reset was incorporated. With the addition of this feature the Battery Sensor learn procedure is no longer required after a battery disconnect/reconnect.
The vehicle will continue to use an estimated state of charge until the vehicle sits for the three hours and then it will start using the actual state of charge value. The Stop/Start system will function normally before and after the learn occurs and will be seamless to the customer.
The following parameters were added to the Circuit/System steps in the Stop/Start System Malfunction .
- Battery Sensor Module Battery State Information = Available/Not Available
- Battery Sensor Module Reset Occurred - Using Estimated State of Charge = Yes/No
GDS2 has been updated to display the parameters above and they can be found under Engine Control Module - Start/Stop System Data.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.