Functions
Adjusts alternator output to improve fuel economy, increase energy system availability, and extend battery life by 10-20%
Identifies battery parameters such as state-of-charge, state-of-function, and state-of-health
Monitors the key-off current, which helps detect defective electronic components
Signs of Failure
When the battery current sensor fails, the vehicle will not charge correctly, leading to a DTC or a dead battery. Common signs of failure include:
Irregular charging rates
Low battery voltage
Corrosion on the battery or sensor connection
Broken or bare sensor cabling