Battery Replacement

If the vehicle battery is replaced, it is very important to perform the BMS Reset using a diagnostic scan tool. If the BMS Reset is not carried out, it holds the old battery parameters and time in service counter in memory. Additionally it tells the system the battery is in an aged state and may limit the Electrical Energy Management system functions. For more information, Refer to: BATTERY, MOUNTING AND CABLES .

Component Description

Generator 

The generator is equipped with an electronic internal voltage regulator.

Generator Current Sensor 

The generator current sensor is attached to the generator B+ cable. It is supplied a 5-volt reference voltage and a ground from the PCM. The generator current sensor is a Hall-effect sensor that supplies an analog feedback signal to the PCM. The PCM uses this information for battery charging strategy and idle stability and torque control.

Battery Current Sensor 

The battery current sensor is attached to the battery negative cable. It is supplied a 5-volt reference voltage and a ground from the BCM. The battery current sensor is a Hall-effect sensor that supplies an analog feedback signal to the BCM. The BCM reads the battery current sensor feedback voltage to determine how much current is flowing through the battery ground cable. The BCM uses this information for battery state of charge.

Powertrain Control Module (PCM) 

The PCM monitors and controls the charging system.

Generator Clutch 

Some vehicles are equipped with a one-way clutch (OWC) in the generator pulley. The primary function is to separate the generator rotor inertia from the FEAD belt, lowering belt tension at high engine deceleration rates and reducing NVH. The generator clutch is serviced separately from the generator.