Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1UR-FE ENGINE CONTROL
CHECK HARNESS AND CONNECTOR (ECM - POWER STEERING OIL PRESSURE SWITCH)
REPLACE POWER STEERING OIL PRESSURE SWITCH
CONFIRM WHETHER DTC OUTPUT RECURS
DTC P0550 Power Steering Pressure Sensor Circuit Malfunction
DTC P0552 Power Steering Pressure Sensor Circuit Low Input
DTC P0553 Power Steering Pressure Sensor Circuit High Input
DESCRIPTION
The power steering oil pressure switch is turned on when a power steering wheel load is generated by turning the steering wheel. The ECM regulates the engine idling speed according to the voltage output of the sensor.
DTC No. | DTC Detection Condition | Trouble Area |
P0550 | Power steering oil pressure switch voltage is below 0.28 V, or higher than 4.9 V for 0.5 seconds while the engine is running (1 trip detection logic). | Open or short in power steering oil pressure switch circuit Power steering oil pressure switch ECM |
P0552 | Power steering oil pressure switch voltage is below 0.28 V for 0.5 seconds while the engine is running (1 trip detection logic). | Open or short in power steering oil pressure switch circuit Power steering oil pressure switch ECM |
P0553 | Power steering oil pressure switch voltage is higher than 4.9 V for 0.5 seconds while the engine is running (1 trip detection logic). | Open or short in power steering oil pressure switch circuit Power steering oil pressure switch ECM |
WIRING DIAGRAM
MONITOR DESCRIPTION
The ECM monitors the switch voltage and uses this value to regulate the engine idling speed. When the sensor output voltage deviates from the normal operating range, the ECM determines that there is a malfunction in the power steering oil pressure switch and stores a DTC.
CONFIRMATION DRIVING PATTERN
INSPECTION PROCEDURE
- HINT:
1.CHECK HARNESS AND CONNECTOR (ECM - POWER STEERING OIL PRESSURE SWITCH) |
Disconnect the ECM connector.
Disconnect the power steering oil pressure switch connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for RHD Tester Connection Condition Specified Condition C59-2 (PSP) - C46-72 (PSP) Always Below 1 Ω C59-1 (VC) - C46-67 (VCV1) Always Below 1 Ω C59-3 (E2) - C46-98 (E2) Always Below 1 Ω C59-2 (PSP) or C46-72 (PSP) - Body ground Always 10 kΩ or higher C59-1 (VC) or C46-67 (VCV1) - Body ground Always 10 kΩ or higher for LHD Tester Connection Condition Specified Condition C59-2 (PSP) - C45-72 (PSP) Always Below 1 Ω C59-1 (VC) - C45-67 (VCV1) Always Below 1 Ω C59-3 (E2) - C45-98 (E2) Always Below 1 Ω C59-2 (PSP) or C45-72 (PSP) - Body ground Always 10 kΩ or higher C59-1 (VC) or C45-67 (VCV1) - Body ground Always 10 kΩ or higher
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OK | |
2.REPLACE POWER STEERING OIL PRESSURE SWITCH |
Replace the power steering oil pressure switch ().
NEXT | |
3.CONFIRM WHETHER DTC OUTPUT RECURS |
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Read the DTCs.
Result | Proceed to |
P0550, P0552 and/or P0553 is output | A |
No DTC is output | B |
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A | ||
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