The ABS ECU(Electronic Control Unit) checks the battery voltage and alternator 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 by reading the value of 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 (Over voltage faults will be always stored.) | |
Enable Conditions | ● When Vign is higher than 16.8V. - If the voltage is recovered to 16.7V, the controller returns to normal state. - The monitored supply voltage is filtered and limited to a rise time of 4 volts per second. | |
Fail Safe | ● The ABS/EBD/ESP functions are inhibited. - The proper function of valves and return pump is not guaranteed. ● The ABS/EBD/ESP warning lamps are activated. ● The supply voltage to wheel speed sensor is interrupted. |
