COMPONENT LOCATION |
GENERAL DESCRIPTION |
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 ECM as a wheel position signal. Controlling idle speed valve, ECM performs appropriate electric load correction With this signal.
DTC DESCRIPTION |
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., ECM sets P0552. MIL(Malfunction Indicatin Lamp) turns on when the malfunction lasts till consecutive 2 driving cycles.
DTC DETECTING CONDITION |
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Item | Detecting Condition | Possible cause | ||||||||||||
DTC Strategy |
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Enable Conditions |
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Threshold value |
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Diagnosis Time |
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MIL On Condition |
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SPECIFICATIONS |
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Pesr(P)rsueKa | 1350 | 4050 | 6749 | 9449 | 10800 |
Voltage(V) | 1 | 2 | 3 | 4 | 4.5 |
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DIAGNOSTIC CIRCUIT DIAGRAM |
MONITOR GDS DATA |
1. | Connect GDS to Data Link Connector(DLC). |
2. | IG “ON”. |
3. | Select “DTC” button, and then Press “DTC Status” to check DTC’s information from the DTCs menu. |
4. | Read “DTC Status” parameter. |
5. | Is parameter displayed “Present fault”? Â
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TERMINAL AND CONNECTOR INSPECTION |
1. | Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.. |
2. | Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. |
3. | Has a problem been found? Â
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POWER CIRCUIT INSPECTION |
â– Check voltage |
1. | IG “OFF” and disconnect the P/S pressure sensor connector. |
2. | IG “ON” |
3. | Measure the voltage between power terminal of P/S pressure sensor harness connector and chassis ground.
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4. | Is the measured voltage within specification ? Â
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SIGNAL CIRCUIT INSPECTION |
â– Check short to ground in harness |
1. | IG “OFF” and disconnect P/S pressure sensor connector and ECM connector. |
2. | Measure the resistance between signal terminal of P/S pressure sensor harness connector and chassis ground.
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3. | Is the measured resistance within specification? Â
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â– Check open in harness |
1. | IG “OFF” and disconnect P/S pressure sensor connector and ECM connector. |
2. | Measure the resistance between signal terminal of P/S pressure sensor harness connector and P/S pressure sensor signal terminal of ECM harness connector.
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3. | Is the measured resistance within specification? Â
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COMPONENT INSPECTION |
â– Check P/S pressure sensor |
1. | IG “OFF” and connect the GDS. |
2. | Connect the probe to signal line of P/S pressure sensor and select the oscilloscope in menu. |
3. | Check the waveform with steering handle movement after engine start. Specification : Â
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4. | Is the measured waveform of P/S pressure sensor normal? Â
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