Battery Sensor Module Learn

Calibration Information

Note: The following is only required if directed to this procedure from another diagnosis. It is required for a Battery Monitor Module or Battery Replacement, or Battery disconnect and reconnect procedure.

In order for the BCM to relearn the Battery Sensor Module status, The vehicle must sit undisturbed for three hours and there must be no significant parasitic electrical drain on the battery. If the parasitic electrical drain does not remain below 100 mA the relearn will not be successfully completed and the Stop/Start system may not operate correctly. 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.

Note: 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.

Calibration Procedure

If necessary, the Battery Sensor Learn can be accomplished by using the following method:

  1. Ignition OFF/Vehicle OFF.
  2. Let the vehicle sit for a minimum of 3.5 hours without any interruptions (such as opening the vehicle door, operating vehicle components, using key fob buttons etc.).
  3. Ignition ON/Propulsion Mode Active.