- Open or short in power steering oil pressure sensor circuit
- Power steering oil pressure sensor
- ECM
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000001EY900IX |
| Title: 2UZ-FE ENGINE CONTROL: SFI SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
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 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 |
Open or short in power steering oil pressure sensor circuit detected for more than 3 seconds after ignition switch turned ON. (1 trip detection logic) |
|
|
P0552 |
Open in power steering oil pressure sensor circuit detected for more than 3 seconds after ignition switch turned ON. |
|
|
P0553 |
Short in power steering oil pressure sensor circuit detected for more than 3 seconds after ignition switch turned ON. |
|
WIRING DIAGRAM
MONITOR DESCRIPTION
The ECM monitors the sensor voltage and uses this value to regulates 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 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 |
|
Time after starter signal ON to OFF |
2 seconds or more |
TYPICAL MALFUNCTION THRESHOLDS
P0550
|
Power steering pressure sensor voltage |
Less than 0.28 V, or more than 4.9 V |
P0552
|
Power steering pressure sensor voltage |
Less than 0.28 V |
P0553
|
Power steering pressure sensor voltage |
More than 4.9 V |
INSPECTION PROCEDURE
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 |
|---|---|---|
|
D30-2 (PSP) - D56-72 (PSP) |
Always |
Below 1 Ω |
|
D30-1 (VC) - D56-66 (VC) |
Always |
Below 1 Ω |
|
D30-3 (E2) - D56-97 (ETHW) |
Always |
Below 1 Ω |
|
D30-2 (PSP) or D56-72 (PSP) - Body ground |
Always |
10 kΩ or higher |
|
D30-1 (VC) or D56-66 (VC) - Body ground |
Always |
10 kΩ or higher |
|
|
2. |
REPLACE POWER STEERING OIL PRESSURE SENSOR |
(a) Replace the power steering oil pressure sensor
.
|
|
3. |
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) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result
|
Result |
Proceed to |
|---|---|
|
P0550, P0552 and/or P0553 are output |
A |
|
No DTC is output |
B |
|
|
|