Perform the Diagnostic system check-IBS.
Refer to "51.Engine Control 1A.Troubleshooting(IBS (RZ4E-TC)) diagnostic system check-IBS".
The battery sensor has a self-diagnosing function, which always monitors the system when the charge control system is operating in order to determine whether there are any system malfunctions and which areas are defective. If a malfunction is found, the generator warning light is illuminated and the DTC information is sent via CAN communication.
The generator warning light is turned OFF when the diagnostic runs and passes. A current DTC is cleared when the diagnostic runs and passes.