The battery current sensor is a 3-wire hall effect current sensor. The battery current sensor monitors the battery current. It directly inputs to the body control module (BCM). It creates a 5-volt pulse width modulation (PWM) signal of 128 Hz with a duty cycle of 0-100 percent. Normal duty cycle is between 5-95 percent. Between 0-5 percent and 95-100 percent are for diagnostic purposes.

The BCM detects a duty cycle of PWM input signal is less than 4 percent or more than 96 percent for more 33 seconds.

The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM warning message.

The DTC clears as current status when the battery sensed current returns to normal range for more than 5 seconds.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Engine Electrical Connector End Views

Electrical Information Reference

1. Ignition OFF, disconnect the harness connector at the battery current sensor.
2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal B and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high. If the circuit tests normal, replace the BCM.

3. Ignition ON, test for 5 volts between the battery current sensor supply voltage circuit terminal A and ground.

⇒	If less than the specified range, test the battery current sensor supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests, normal replace the BCM.

4. Test for 5 volts between the battery current sensor signal circuit and ground.

⇒	If less than 5 volts, test the battery current sensor signal circuit terminal C for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, test or replace the battery current sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.