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 Signal Invalid

DTC B1516 66
- Battery Current Sensor Wrong Mounting Position

Diagnostic Fault Information






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 charge indicator illuminates in the instrument panel cluster (IPC).
* The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM message.

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.

Circuit/System Testing

B1516 08
1. Ignition OFF, disconnect the harness connector at the battery current sensor.
2. Ignition OFF, test for less than 1.0 ohm between the low reference circuit terminal B and ground.

• If greater than the specified value, test the low reference circuit terminal B for an open/high resistance. If the circuit tests normal, replace the BCM.

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.

B1516 66
1. Verify that the battery current sensor is installed securely, and positioned with the tape tab pointing away from the negative terminal and toward the positive terminal on the battery.

• If the battery current sensor is not installed correctly, remove and reinstall the sensor properly.

2. Test or replace the battery current sensor.

Repair Instructions

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

* Battery Positive Cable Replacement for current sensor replacement