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 Descriptor

DTC B1516
- Battery Current Sensor Performance Signal

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

* Ignition 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 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 5 seconds.
* A history DTC will clear after 100 ignition cycles.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the battery current sensor.
2. Ignition OFF, test for less than 1 ohm 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.

3. 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 terminal A for a short to ground or an open/high resistance. If the circuit tests normal, then 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, then replace the BCM.

4. 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 test 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.

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

Repair Instructions

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

* Battery Current Sensor Replacement