7GR-FKS ENGINE CONTROL SFI SYSTEM P055011 Power Steering Pressure Sensor/Switch Circuit Short to Ground
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. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P055011 | Power Steering Pressure Sensor/Switch Circuit Short to Ground | Power steering oil pressure switch voltage below 0.28 V for 3 seconds while engine running (1 trip detection logic). | ·
Open or short in power steering oil pressure switch circuit ·
Power steering oil pressure switch ·
ECM |
Comes on | DTC stored | SAE Code: P0552 |
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 switch and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components | Power steering oil pressure switch |
| Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Start the engine.
Idle the engine for 5 seconds.
Enter the following menus: Powertrain / Engine / Trouble Codes.
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 / Utility / All Readiness.
Input the DTC: P055011.
Check the DTC judgment result.
| GTS 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 |
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- HINT:
-
Read freeze frame data using the GTS. 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
| *a | Front view of wire harness connector
(to Power Steering Oil Pressure Switch) |
- HINT:
-
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
Disconnect the power steering oil pressure switch connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition E66-1 (VC) - E66-3 (E2) Ignition switch ON 4.5 to 5.5 V E66-2 (PSP) - E66-3 (E2) Ignition switch ON 3.0 to 5.5 V
Turn the ignition switch off and wait for at least 30 seconds.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E66-1 (VC) - E66-2 (PSP) Ignition switch off 171 to 189 kΩ
- Result:
Proceed to OK NG
OK
NG
Disconnect the power steering oil pressure switch connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E66-1 (VC) - E2-23 (VC) Always Below 1 Ω E66-2 (PSP) or E2-27 (PSP) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG