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DTC B1516

The battery current sensor is a 3-wire hall effect current sensor. The battery current sensor monitors the current through the negative battery cable. The BCM supplies a 5V Reference and ground to the battery current sensor. The Body Control Module monitors the voltage on the 5V Reference circuit to ensure that it is in the correct range.

B1516 08

The Body Control Module is awake.

B1516 66

B1516 08

The battery current signal is less than 4% or greater than 96% duty cycle for 2 minutes.

B1516 66

The battery current polarity is positive for 2 minutes.

The Regulated Voltage Control is disabled.

The DTC passes when the battery current returns to the normal range for 15 s.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

B1516 08

1. Ignition OFF, disconnect the harness connector at the B18 Battery Current Sensor.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 min. Test for less than 5 Ω between the low reference circuit terminal B and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

3. Ignition ON, test for 4.8-5.2 V between the 5V Reference circuit terminal A and ground.

⇒	If less than the specified range, test the 5V Reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, then replace the K9 Body Control Module.

⇒	If greater than the specified range, test the 5V Reference circuit for a short to voltage. If the circuit tests normal, then replace the K9 Body Control Module.

4. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal C and ground.

⇒	If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

⇒	If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

5. If all circuits test normal, replace the B18 Battery Current Sensor.

B1516 66

1. Verify that the B18 Battery Current Sensor is installed securely around the negative battery cable, with the tape tab pointing away from the negative terminal on the C1 Battery.

⇒	If the B18 Battery Current Sensor is not installed correctly, remove and reinstall the sensor properly.

2. Replace the B18 Battery Current Sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.