Regarding the SOC (State Of Charge) measurement- which will also affect battery charging:If the vehicle battery is replaced , carry out the BMS Reset using the scan tool. If the BMS Reset is not carried out, measurement data collected for the old battery will not be deleted and future state of charge measurements will be inaccurate. For example, if an old battery has a state of charge of 60% and the new battery has a state of charge of 90%, the BCM will recognize battery state of charge being 30% lower than it actually is. With the battery state of charge being perceived lower than it actually is causes shedding of loads earlier than is necessary. This also impacts the smart regenerative charge system (REFER to Charging System) by causing the battery to be maintained at a higher state of charge than perceived by the BCM , reducing fuel economy benefits.
Battery Monitoring Sensor
The battery monitoring sensor is attached to the negative battery terminal and cable assembly, which provides a ground to the sensor. The battery monitoring sensor measures voltage, current and temperature of the battery and uses these inputs to calculate the battery condition, transmitting this information through the LIN circuit to the BCM . The battery monitoring sensor has a 2-pin connector providing battery voltage and LIN connections. The battery monitoring sensor has to be recalibrated at regular intervals. This occurs during a rest period or when the battery closed-circuit current is less than 100mA. The rest period must last for at least 3
hours. The timeframe in which a recalibration must take place is 7 days. If the system has been unable to carry out a recalibration within this time then it is impossible to confirm the exact state of charge of the battery. Any devices left attached to the power socket that draw in excess of 100mA (or less depending on other battery loads) will prevent a battery monitoring sensor recalibration.
You can do it yourself. See post number 5.no
I was going to buy a battery and fit it myself and the parts company I phoned told me as it is a stop/start engine that it would need reprogramming. When I tried to book it in online with Halfords it shows an extra charge for this also.