The HECU monitors the voltage from the valve relay.
When the valve relay is switched to ON, the HECU will set this code if the solenoid voltage is below a specific range for a period of time.
When the valve relay is switched to OFF, the HECU sets this code if the solenoid voltage is over a specific range for a period of time.
Item | Detecting Condition | Possible cause | |
Case 1 | DTC Strategy |
•
Valve relay open, short to ground, leakage current check | 1. Open or short in power supply circuit 2. Blown fuse |
Enable Conditions |
•
If the valve relay is switched ON and the Vvr is lower than 5±0.5V continuously for 60msec, the failure is detected.
•
A failure is detected if the voltage difference between power side and load side of valve relay is greater than 1±0.15V longer than 60msec. ※ Vvr : The voltage of valve relay | ||
Case 2 | DTC Strategy |
•
Valve relay short to battery | |
Enable Conditions |
•
If the valve relay is switched OFF and Vvr is higher than 6±0.5V or Vvr is lower than 2.5±0.5V continuously for 60msec, the failure is detected. | ||
Fail Safe |
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All functions are inhibited | ||
MIL |
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The ABS/EBD/ESP(ESC) warning lamp is activated. | ||
Reset Condition |
•
Normal after IG turned on again | ||
