Many control units have applied to vehicle as it becomes more electronical. 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 real output voltage is lower than target voltage.
Item
Detecting Condition
Possible cause
DTC Strategy
Signal Monitoring
Open or short in harness
Faulty battery sensor
Poor connection
Enable Conditions
IG "ON"
No error related to LIN communication
Threshold value
Battery voltage at power supply terminal of ECM – voltage from battery sensor > 3V
Diagnosis Time
60sec
MIL On Condition
NO MIL ON(DTC only)