The 4WD ECM monitors the battery voltage to determine, as a safety issue, whether this system can operate normally or not. The normal battery voltage range is essential for controlling this system as intended.
4WD ECM sets this code if high or low voltage caused by faulty alternator or poor connention in power supply circuit is detected.
Item
Detecting Condition
Possible cause
DTC Strategy
Battery Voltage Monitoring
Faulty charging system.
Open/short in power circuit.
Faulty ground circuit
Enable conditions
Engine "ON"
Threshold value
IG voltage is higher than a normal value
IG voltage is lower than a normal value
Fail Safe
lamp "ON"