A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P052012,P052014; Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery; 2020 - 2022 MY Avalon HV [08/2019

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001JVYQ
Model Year Start: 2020	Model: Avalon HV	Prod Date Range: [08/2019 - ]
Title: A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P052012,P052014; Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery; 2020 - 2022 MY Avalon HV [08/2019 - ]

DTC

P052012

Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery

DTC

P052014

Engine Oil Pressure Sensor/Switch "A" Circuit Short to Ground or Open

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).	Open or short in oil pressure sensor circuit Oil pressure and temperature sensor ECM	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).	Open or short in oil pressure sensor circuit Oil pressure and temperature sensor ECM	Comes on	DTC stored	SAE Code: P0522

Related Data List

DTC No.	Data List
P052012	Engine Oil Pressure
P052014	Engine Oil Pressure

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

P0523: Range Check (High Voltage)

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
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.
Click here

(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).

Standard Voltage:

Tester Connection	Condition	Specified Condition
C74-3 (VC) - Body ground	Power switch on (IG)	4.5 to 5.5 V
C74-1 (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
C74-1 (POUT) - C74-2 (GND)	Power switch off	190 to 210 kΩ
C74-2 (GND) - Body ground	Always	Below 1 Ω

REPLACE OIL PRESSURE AND TEMPERATURE SENSOR

2.	CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM)

(a) Disconnect the oil pressure sensor connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C74-2 (GND) - C55-100 (EPEO)	Always	Below 1 Ω
C74-1 (POUT) - C55-122 (PEO)	Always	Below 1 Ω
C74-3 (VC) - C55-99 (VCPE)	Always	Below 1 Ω
C74-1 (POUT) or C55-122 (PEO) - Body ground and other terminals	Always	10 kΩ or higher
C74-3 (VC) or C55-99 (VCPE) - Body ground and other terminals	Always	10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR