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/PCM. ECM/PCM controls generating voltage by duty cycle based on these signals.
ECM/PCM shows P2501 when there is a wide voltage difference between battery sensor and actual value.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Signal Monitoring | 1. Open or short in harness 2. Faulty battery sensor 3. Poor connection |
Enable Conditions |
•
Engine running state
•
No error related to LIN communication | |
Threshold Value |
•
There is a wide voltage difference between battery sensor and actual value. | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
NO MIL |
