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 temperature from battery sensor is too high.
Item
Detecting Condition
Possible cause
DTC Strategy
Signal Monitoring
Battery temperature high
Enable Conditions
Engine running state
No error related to LIN communication
Threshold value
Battery temperature from battery sensor > 70?
Diagnosis Time
Continuous
MIL On Condition
NO MIL ON(DTC only)
Fig 1) Normal data of battery sensor temperature at 10.5? (51?)
Fig 2) Abnormal data of battery sensor temperature when battery sensor circuit open.