The HECU monitors the pump motor relay. If the ECU detects an open or short in the motor circuit, it then sets this code.
Item | Detecting Condition | Possible cause | |
Case 1 | DTC Strategy |
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Motor relay open, motor short to GND check | 1. Open or short of power supply circuit (BAT1) 2. Faulty HECU |
EnableConditions |
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A failure is detected if the Vmr is below (Motor Duty * 100 /3 – 2.8V) 7 times during motor relay is on.
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A failure is detected if the voltage difference between power side and load side of motor relay is greater than 1±0.15V longer than 100msec during motor relay is on. ※ Vmr : The voltage of motor | ||
Reset Condition |
•
Normal on a driving (vehicle speed is above 30km/h) after IG turned On again. | ||
Case 2 | DTC Strategy |
•
Motor open, short to battery | |
Monitoring Period |
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After motor relay is switched off over 1.8sec. | ||
Enable Conditions |
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A failure is detected if the Vmr is above 4±0.5V longer than 500msec during motor relay is off. (This monitoring works after motor relay is switched off over 1.8sec) | ||
Reset Condition |
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Normal after IG turned on again. | ||
Case 3 | DTC Strategy |
•
Motor lock | |
Enable Conditions |
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If any following condition is monitored, controller drives motor maximum 3 times for test. A failure is detected if any following condition is satisfied continuously during test. 1) Vmr is below 0.5±0.1V within 20msec after motor is off 2) The decreasing rate of Vmr for 1 second is out of normal range after motor is off. ※ Vmr : The voltage of motor | ||
Reset Condition |
•
Normal on a driving (vehicle speed is above 30km/h) after IG turned On again. | ||
Case 4 | DTC Strategy |
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Motor GND Open | |
Enable Conditions |
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A failure is detected if Vpgrd is above 5V longer than 500msec during motor relay is on. ※ Vpgrd : The voltage of motor ground | ||
Reset Condition |
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Normal on a driving (vehicle speed is above 30km/h) after IG turned On again. | ||
Case 5 | DTC Strategy |
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Motor fuse open | |
Enable Conditions |
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A failure is detected if VBAT2 is below 4±0.5V longer than 1 second. | ||
Reset Condition |
•
Normal on a driving (vehicle speed is above 30km/h) after IG turned On again. | ||
Fail Safe |
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Inhibit the ESP(ESC)/DBC/AVH control and allow the ABS/EBD control. | ||
MIL |
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The ESP(ESC)/DBC/AVH warning lamp is activated. | ||
