Circuit/System Description

The battery current sensor is a 3-wire hall effect current sensor. The body control module (BCM) supplies a 5 volt reference voltage and a ground circuit to the battery current sensor. The battery current sensor measures the amount of current flowing to or from the battery and supplies a pulse width modulation (PWM) signal to the BCM. The BCM monitors the battery current signal and sets DTC B1516 08 if the signal is outside the normal range of 4-96 percent duty cycle. The BCM also monitors the current polarity, and sets DTC B1516 66 if reverse polarity is detected.