1. Alternator
2. HECU
The ABS ECU(Electronic Control Unit) checks the battery voltage and generator output voltage to determine, as a safety issue, whether the ABS system can operate normally or not.
The normal battery voltage range is essential for controlling the ABS system as intended.
The ABS ECU monitors battery voltage and alternator output voltage.
When the voltage is higher than the expected normal value, this code is set, and the ABS/EBD/ESP functions are prohibited.
If the voltage recovers, to within normal operating ranges, then the controller returns to normal operation as well.
Item
Detecting Condition
Possible cause
DTC Strategy
Battery Voltage Monitoring
Poor connection in power supply circuit (IGN+)
Faulty Alternator
Monitoring Period
Continuous
Enable Conditions
When Vign is higher than 16.9±0.5V for more than 500ms.
- If the voltage is recovered to 16.7±0.5V, the controller returns to normal state
- Cut off the power of wheel speed sensor if Vign is higher than 16.7±0.5V is coutinued over 500ms.
- Make the system shut down if Vign is higher than 19.5±0.5V is continued over 500ms.
Fail Safe
The ABS/EBD/ESP functions are inhibited
The ABS/EBD/ESP warning lamps are activated