B1516
DTC B1516
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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
Typical Scan Tool Data
Circuit/System Description
The battery current sensor is a 3-wire hall effect current sensor. The body control module (BCM) supplies a 5 volt reference voltage and a ground circuit 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 BCM. The BCM monitors the battery current signal and sets DTC B1516 08 if the signal is outside the normal range of 4-96 percent duty cycle. The BCM also monitors the current polarity, and sets DTC B1516 66 if reverse polarity is detected.
Conditions for Running the DTC
B1516 08
* The BCM is awake.
* The engine is running.
B1516 66
* The BCM is awake.
* The engine is OFF.
Conditions for Setting the DTC
B1516 08
The BCM detects the battery current sensor signal is less than 4 percent or greater than 96 percent duty cycle for 2 minutes.
B1516 66
The BCM detects the battery current sensor polarity is positive for 2 minutes.
Action Taken When the DTC Sets
* The regulated voltage control (RVC) is disabled.
* The "SERVICE VEHICLE SOON" warning message will be displayed on the driver information centre.
Conditions for Clearing the DTC
The DTC will clear when the battery current sensor signal returns to the normal for greater than 15 seconds.
Reference Information
Schematic Reference
Starting and Charging Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Charging System Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
Ignition ON, headlamps, HVAC and all accessories OFF, observe the scan tool BCM Battery Current parameter. The reading should be between -3 amps and -25 amps. Whilst observing the scan tool turn the headlamps and accessories ON and OFF, the scan tool parameter should change when headlamps and accessories are operated.
Circuit/System Testing
B1516 08
1. Ignition OFF, disconnect the harness connector at the battery current sensor.
2. Ignition OFF for 90 seconds, test for less than 5 ohms 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 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 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.
5. If all circuits test normal, replace the battery current sensor.
B1516 66
1. Verify that the battery current sensor is installed securely around the positive battery cable, with the tape tab pointing toward the positive terminal on the battery.
• If the battery current sensor is not installed correctly, remove and reinstall the sensor properly.
2. If the battery current sensor is installed correctly, replace the battery current sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Battery Negative Cable Replacement (Auxiliary) Battery Negative Cable Replacement (Auxiliary)Battery Negative Cable Replacement (Primary) Battery Negative Cable Replacement (Primary)
* Control Module References Control Module References for BCM replacement, setup, and programming.