To reduce the required power to manipulate steering wheel, hydraulic pressure is used in power steering system. A load is sensed at steering oil pressure sensor then inputted to PCM as a wheel position signal. Controlling idle speed valve, PCM performs appropriate electric load correction With this signal.
Checking output signals from P/S PS(power steering pressure sensor) every 2.5 sec. under detecting condition, if an signal below 0.05V lasts for more than 1.25 sec., PCM sets P0552. MIL(Malfunction Indicatin Lamp) turns on when the malfunction lasts till cosecutive 2 driving cycle.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Detects sensor signal short to low voltage |
•
Poor connection
•
Open in power circuit
•
Open or short to ground in signal circuit
•
Faulty P/S pressure sensor
•
Faulty PCM |
Enable Conditions |
•
Engine works
•
11V ≤ Battery voltage ≤ 16V | |
Threshold value |
•
Sensor output voltage < 0.25V | |
Diagnosis Time |
•
Continuous (More than 1.25 seconds failure for every 2.5 seconds test ) | |
MIL On Condition |
•
2 Driving Cycle |
Pressure(Kgf/㎠) | 37.9 | 41.3 | 68.8 | 96.4 |
Voltage(V) | 1 | 2 | 3 | 4 |
