B1516

DTC B1516

Diagnostic Instructions

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

DTC Descriptors

DTC B1516 08
- Battery Current Sensor Performance Signal Invalid

DTC B1516 66
- Battery Current Sensor Performance Wrong Mounting Position

Diagnostic Fault Information






Circuit/System Description

The BCM supplies 5 volts and ground 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 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 greater than 96 percent for 33 seconds.

Action Taken When the DTC Sets

The charge indicator illuminates on the instrument panel cluster (IPC).

Conditions for Clearing the DTC

* The DTC clears as current status when the battery sensed current returns to normal range for 5 seconds.
* A history DTC will clear after 100 ignition cycles.

Circuit/System Testing

1. Verify that the current sensor is mounted correctly on the battery cable. Refer to Battery Current Sensor Replacement (LAT).
2. Ignition ON, disconnect the battery current sensor.
3. Ignition OFF, test for less than 1.0 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 resistance. If the circuit tests normal, replace the BCM.

4. Ignition ON, test for 4.8 - 5.2 volts between the 5-volt reference circuit terminal A and ground.

• If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
• If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the BCM.

5. Ignition ON, test for 4.8 - 5.2 volts 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 BCM.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.

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

Repair Instructions

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

* Battery Current Sensor Replacement (LAT)