Lexus ES: Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery (P052012,P052014)
DESCRIPTION
Variable oil pump control uses the oil pressure control valve assembly, engine oil temperature sensor, oil pressure sensor and ECM to optimize the oil pressure and oil volume required by each component to reduce friction by monitoring the engine temperature and engine speed. The oil pressure sensor utilizes a semiconductor type pressure sensor that changes resistance in accordance with changes in pressure. An internal electrical signal that varies with the change in resistance is amplified and sent to the ECM as the engine oil pressure signal.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P052012 | Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery | The oil pressure sensor output voltage is higher than 4.495 V for 5 seconds or more (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0523 |
| P052014 | Engine Oil Pressure Sensor/Switch "A" Circuit Short to Ground or Open | The oil pressure sensor output voltage is less than 0.159 V for 5 seconds or more (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0522 |
| DTC No. | Data List |
|---|---|
| P052012 | Engine Oil Pressure |
| P052014 |
MONITOR DESCRIPTION
The ECM calculates the engine oil pressure based on the output voltage of the oil pressure sensor. If the signal output from the oil pressure sensor is outside of the specified range, the MIL is illuminated and a DTC is stored.
MONITOR STRATEGY
| Related DTCs | P0522: Engine oil pressure sensor range check (low voltage) P0523: Engine oil pressure sensor range check (high voltage) |
| Required Sensors/Components (Main) | Oil pressure sensor |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Continuous |
| Duration | 5 seconds |
| MIL Operation | Immediate |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever the following DTCs are not stored | None |
| Both of the following conditions are met | - |
| Auxiliary battery voltage | 8 V or higher |
| Power switch | On (IG) |
TYPICAL MALFUNCTION THRESHOLDS
P0522: Range Check (Low Voltage)| Engine oil pressure sensor voltage | Less than 0.159 V |
| Engine oil pressure sensor voltage | Higher than 4.495 V |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
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-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) [A].
- Turn the Techstream on.
- Wait 10 seconds or more [B].
- Enter the following menus: Powertrain / Engine / Trouble Codes [C].
-
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: P052012 or P052014.
-
Check the DTC judgment result.
Techstream 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 is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system is malfunctioning.
-
[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
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(Select Powertrain in Health Check and then check the time stamp data.)
Click here
-
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here
HINT:
Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. 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 |
| *a | Front view of wire harness connector (to Oil Pressure Sensor) |
HINT:
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
(a) Disconnect the oil pressure sensor connector.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C116-3 (VC) - Body ground | Power switch on (IG) | 4.5 to 5.5 V |
| C116-1 (POUT) - Body ground | Power switch on (IG) | Below 0.1 V |
(d) Turn the power switch off and wait for at least 30 seconds.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C116-1 (POUT) - C116-2 (GND) | Power switch off | 190 to 210 kΩ |
| C116-2 (GND) - Body ground | Always | Below 1 Ω |
| OK | .gif) | REPLACE OIL PRESSURE AND TEMPERATURE SENSOR |
|
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| 2. | CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM) |
(a) Disconnect the oil pressure sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C116-2 (GND) - C88-100 (EPEO) | Always | Below 1 Ω |
| C116-1 (POUT) - C88-122 (PEO) | Always | Below 1 Ω |
| C116-3 (VC) - C88-99 (VCPE) | Always | Below 1 Ω |
| C116-1 (POUT) or C88-122 (PEO) - Body ground and other terminals | Always | 10 kΩ or higher |
| C116-3 (VC) or C88-99 (VCPE) - Body ground and other terminals | Always | 10 kΩ or higher |
| OK | | REPLACE ECM |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Components
COMPONENTS ILLUSTRATION *1 CENTER INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY *2 INSTRUMENT PANEL FINISH PANEL END LH *3 INSTRUMENT PANEL FINISH PANEL END RH *4 NO. 1 STEREO JACK ADAPTER ASSEMBLY *5 REAR UPPER CONSOLE PANEL SUB-ASSEMBLY *6 SHIFT LEVER KNOB SUB-ASSEMBLY
Components
COMPONENTS
ILLUSTRATION
*A
Type A
*B
Type B
*1
FRONT WHEEL OPENING EXTENSION PAD LH
*2
FRONT WHEEL OPENING EXTENSION PAD RH
*3
NO. 1 ENGINE UNDER COVER
*4
