DESCRIPTION The power
steering oil pressure sensor is turned ON when a power steering wheel
load occurs by turning the steering wheel. The ECM regulates the engine
idling RPM according to the voltage output of the sensor. |
DTC No. | DTC Detection Condition |
Trouble Area | | P0550 |
Power steering oil pressure sensor voltage less than 0.28 V, or more than 4.9 V for 0.5 seconds while engine running.
(1 trip detection logic) |
- Open or short in power steering oil pressure sensor circuit
- Power steering oil pressure sensor
- ECM
| | P0552 |
Power steering oil pressure sensor voltage less than 0.28 V for 0.5 seconds while engine running.
(1 trip detection logic) |
- Open or short in power steering oil pressure sensor circuit
- Power steering oil pressure sensor
- ECM
| | P0553 |
Power steering oil pressure sensor voltage more than 4.9 V for 0.5 seconds while engine running.
(1 trip detection logic) |
- Open or short in power steering oil pressure sensor circuit
- Power steering oil pressure sensor
- ECM
| MONITOR DESCRIPTION
The
ECM monitors the sensor 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 sensor and stores a DTC. MONITOR STRATEGY |
Related DTCs | P0550: Power steering pressure sensor range check (Chattering)
P0552: Power steering pressure sensor range check (Low Resistance)
P0553: Power steering pressure sensor range check (High Resistance) | |
Required sensors/Components (Main) |
Power steering oil pressure sensor | |
Frequency of operation |
Continuous | | Duration |
0.5 seconds | |
MIL operation | Immediate | |
Sequence of operation | None | TYPICAL ENABLING CONDITIONS |
Monitor runs whenever following DTCs not present |
None | | Starter |
OFF | | Time after starter signal ON to OFF |
2 seconds or more | TYPICAL MALFUNCTION THRESHOLDS P0550 |
Power steering oil pressure sensor voltage |
Less than 0.28 V, or more than 4.9 V | P0552 |
Power steering oil pressure sensor voltage |
Less than 0.28 V | P0553 |
Power steering oil pressure sensor voltage |
More than 4.9 V | CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON and turn the Techstream on.
- Start the engine.
- Idle the engine for 5 seconds [A].
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
- Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P0550, P0552 or P0553.
- Check the DTC judgment result.
|
Tester Display |
Description |
|
NORMAL |
- DTC judgment completed
- System normal
|
|
ABNORMAL |
- DTC judgment completed
- System abnormal
|
|
INCOMPLETE |
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
|
|
N/A |
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
|
HINT:
If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [B] again.
- If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page
 ).
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
 CAUTION / NOTICE / HINT
HINT:
- If other DTCs relating to different systems that have terminal E2 as the
ground terminal are output simultaneously, terminal E2 may have an open
circuit.
- Read freeze frame data using the Techstream. Freeze frame data records
the engine condition when malfunctions are detected. When
troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the
air-fuel ratio was lean or rich, and other data from the time the
malfunction occurred.
PROCEDURE |
1. | CHECK HARNESS AND CONNECTOR (ECM - POWER STEERING OIL PRESSURE SENSOR) |
 (a) Disconnect the ECM connector.
(b) Disconnect the power steering oil pressure sensor connector. (c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
D46-2 (PSP) - D74-72 (PSP) |
Always | Below 1 Ω | |
D46-1 (VC) - D74-67 (VCV1) |
Always | Below 1 Ω | |
D46-3 (E2) - D74-98 (E2) |
Always | Below 1 Ω | |
D46-2 (PSP) or D74-72 (PSP) - Body ground |
Always | 10 kΩ or higher | |
D46-1 (VC) or D74-67 (VCV1) - Body ground |
Always | 10 kΩ or higher |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
| 2. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF POWER STEERING OIL PRESSURE SENSOR) |
(a) Disconnect the power steering oil pressure sensor connector. (b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Switch Condition |
Specified Condition | |
D46-2 (PSP) - D46-3 (E2) |
Ignition switch ON | 4.5 to 5.5 V |
| NG |
| REPLACE ECM |
|
OK | |
| |
| 3. |
REPLACE POWER STEERING OIL PRESSURE SENSOR |
(a) Replace the power steering oil pressure sensor (See page
).
|
NEXT | |
| |
| 4. |
CONFIRM WHETHER DTC OUTPUT RECURS | (a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON. (c) Turn the Techstream on.
(d) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(f) Confirm that the DTC is not output
| NEXT |
| END | | 
