If open in motor pump relay or fuse, motor open, short to battery, motor lock is detected, HECU sets DTC C2402.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
•
Voltage Monitoring | 1. Power Circuit Open/Short 2. Blown Fuse 3. Defected HECU | |
Threshold Value | Case 1 (Solenoid Valve Actuating Monitoring) |
•
Monitoring solenoid valve electrical fault, pump motor relay and pump motor - Short in each solenoid valve line by operating each solenoid valve and pump motor one by one - Monitoring Period : Detects 1 time after Ignition "ON" and vehicle speed of 30 km/h(Approx. 18.6 mph) | |
Case 2 (Motor Relay Open/Motor Short to GND) |
•
Motor supply voltage is less than 7.0V for more than 300 msec. | ||
Case 3 (Motor Open/Short to GND) |
•
Motor operation voltage does not reach 3.0V 80msec after motor replay operation or Motor operation voltage is 4V less than ignition voltage | ||
Case 4 (Motor Lock) |
•
Motor operation voltage is higher than 3.0 V for more than 2.5 sec.
•
Motor duty low level is less than 40 msec for 3 times | ||
Warning Indicator Lamp Status |
•
ABS/ESC(ESP) Warning Indicator Lamp "ON" | ||
Clear Condition |
•
In case of 3 and 4 - Ignition "OFF" and then "ON" and Vehicle reference speed over 30 km/h (Approx. 19 mph)
•
In case of 1 and 2 - Ignition "OFF" and then "ON" | ||
