Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | 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 PerformanceCircuit/System Description
The generator battery control module (GBCM) monitors its internal battery current sensor for many charging system operations. If the battery current sensor signal is out of range, DTC B1516 will set.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | This diagnostic runs every 50 ms. |
Conditions for Setting the DTC
The duty cycle of the internal battery current sensor is less than 2 percent duty cycle or greater than 98 percent duty cycle for 4 minutes.
Action Taken When the DTC Sets
| • | The charge indicator turns ON. |
| • | The driver information center (DIC) displays the SERVICE CHARGE SYS message. |
Conditions for Clearing the DTC
| • | The DTC will pass when the duty cycle of the internal battery current sensor is between 2 percent and 98 percent duty cycle. |
| • | You must cycle the ignition after clearing the DTC to turn OFF the DIC message and charge indicator. |
Reference Information
Schematic Reference
Starting and Charging Schematics
Connector End View Reference
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, headlamps and all accessories OFF, observe the scan tool BCM Battery Current parameter. The reading should be between -30 amps and 30 amps, and change with the amount of current draw on the battery.
Circuit/System Testing
Replace the GBCM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for GBCM replacement, setup, and programming.
