B1516

DTC B1516

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC B1516 08
- Battery Current Sensor Performance Signal Invalid

Diagnostic Fault Information





Circuit/System Description

The battery current sensor supplies a pulse width modulation (PWM) input signal to the body control module (BCM).

Conditions for Running the DTC

* The ignition is ON.
* The engine is running.

Conditions for Setting the DTC

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

Action Taken When the DTC Sets

The SERVICE VEHICLE SOON warning message will be displayed on 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.
* A history DTC will clear after 100 ignition cycles.

Reference Information
Schematic Reference

* Starting and Charging Schematics ([1][2]Electrical Diagrams)
* Body Control System Schematics (Electrical Diagrams)

Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Charging System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for Scan Tool Information

Circuit/System Testing

1. Ignition ON. Disconnect the battery current sensor. Measure the voltage of the current sensor 5-volt reference circuit terminal A. Verify that the 5-volt reference circuit measures 5 volts.

• If the voltage is less than 5 volts, test the current sensor 5-volt reference circuit for a short to ground, a high resistance, or an open circuit. If the circuit tests normal, replace the BCM.

2. Measure the voltage of the current sensor signal circuit terminal C. Verify that the signal circuit measures 5 volts.

• If the signal circuit voltage is less than 5 volts, test the current sensor signal circuit for a short to ground, a high resistance, or an open circuit. If the circuit tests normal, replace the BCM.

3. Measure the voltage of the between the current sensor 5-volt reference circuit terminal A and the low reference circuit terminal B. Verify that there are 5 volts between the supply voltage circuit and the low reference circuit.

• If the voltage is less than 5 volts, test the current sensor low reference circuit for a high resistance, an open circuit. If the circuit tests normal, replace the BCM.

4. If all 3 circuits test normal, replace the battery current sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Battery Current Sensor Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for BCM replacement, setup, and programming