B1516

DTC B1516

DTC DESCRIPTOR

DTC B1516 08
Battery Current Sensor Signal Invalid

DTC B1516 66
Battery Current Sensor Wrong Mounting Position

DIAGNOSTIC FAULT INFORMATION






IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
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.

CONDITIONS FOR RUNNING THE DTC
- The ignition is ON.
- The engine is running.

CONDITIONS FOR SETTING THE DTC

B1516 08
The BCM detects a duty cycle of PWM input signal is less than 4 percent or more than 96 percent for more 33 seconds.

B1516 66
The BCM detects the battery current sensor is improperly installed.

ACTION TAKEN WHEN THE DTC SETS
The SERVICE VEHICLE SOON warning message will be illuminated in the driver information center (DIC).

CONDITIONS FOR CLEARING THE DTC
- The DTC clears as current status when the battery sensed current returns to normal range for more than 5 seconds.
- Using the scan tool Clear DTC Information function can clear the DTC.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the harness connector at the battery current sensor.
2. Ignition ON, test for 5 volts between the battery current sensor supply voltage circuit, harness side and ground.
- If the voltage is less than 5 volts, test the battery current sensor supply voltage circuit for a short to ground, a high resistance, an open circuit, or replace the BCM.
3. Ignition ON, test for 5 volts between the battery current sensor supply voltage circuit and current sensor low reference circuit, harness side.
- If the voltage is less than 5 volts, test the current sensor low reference circuit for a high resistance, an open circuit, or replace the BCM.
4. Ignition ON, test for 5 volts between the battery current sensor signal circuit, harness side and ground.
- If the voltage is less than 5 volts, test the battery current sensor signal circuit for a short to ground, a high resistance, an open circuit, or replace the BCM.
5. If all 3 circuits test normal, replace the battery current sensor.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for BCM replacement, setup, and programming
Battery Current Sensor Replacement (RPOs LZE/LZ4/LZ9) Battery Current Sensor Replacement (RPO LS4).