Many control units have applied to vehicle as it becomes more eletrolnical. These units control their own system based on information from diverse sensors. Therefore necessity of common use of diverse sensor information and importance of stable power supply are gathering strength. Battery sensor is mounted on battery (-) terminal. It transmits battery voltage, current, temperature information to ECM. ECM controls generating voltage by duty cycle based on these signals.
ECM sets this code when the battery charging current from battery sensor is too low.
Item
Detecting Condition
Possible Cause
DTC Strategy
Signal Monitoring
Open or short in harness
Open or short in charging system
Faulty charging system
Enable Conditions
Engine running state
No LIN Bus error / No Plausibility Error related to smart sensor / No Alternator Error
Threshold Value
State of Charge(SOC) < Calibration
Diagnostic Time
Continuous
MIL ON Condition
2 Driving Cycles