General Information

Engine Control
U1111 Battery Sensor fault detected by ECU - General Information

Component Location





General Description

Battery sensor is mounted on the battery (-) terminal. It transmits battery voltage, current, temperature information to ECM. ECM controls the generating output by changing the duty cycle to the generator based on these signals.

DTC Description

ECM sets this code when error bit in LIN messages from battery sensor indicates "1"

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig.1) Signal waveforms of battery sensor