M20F-FXS, M20G-FXS ENGINE CONTROL SFI SYSTEM P052012 Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery 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 pressure and temperature 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 (engine oil pressure and temperature 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 | Note |
|---|---|---|---|---|---|
| P052012 | Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery | The oil pressure sensor (engine oil pressure and temperature 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 (engine oil pressure and temperature sensor) circuit ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
ECM |
Comes on | SAE Code: P0523 |
| P052014 | Engine Oil Pressure Sensor/Switch "A" Circuit Short to Ground or Open | The oil pressure sensor (engine oil pressure and temperature 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 (engine oil pressure and temperature sensor) circuit ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
ECM |
Comes on | 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 (engine oil pressure and temperature 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
| Frequency of Operation | Continuous |
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.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
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 [A].
Turn the GTS 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.
| 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 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.
(Select Powertrain in Health Check and then check the time stamp data.)
·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.
- HINT:
-
Read Freeze Frame Data using the GTS. 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
| *a | Front view of wire harness connector
(to Oil Pressure Sensor (Engine Oil Pressure and Temperature Sensor)) |
- HINT:
-
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
Disconnect the oil pressure sensor (engine oil pressure and temperature sensor) 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 C41-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V C41-1 (POUT) - Body ground Ignition switch ON Below 0.1 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 C41-1 (POUT) - C41-2 (GND) Ignition switch off 190 to 210 kΩ C41-2 (GND) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the oil pressure sensor (engine oil pressure and temperature sensor) connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C41-2 (GND) - C141-100 (EPEO) Always Below 1 Ω C41-1 (POUT) - C141-122 (PEO) Always Below 1 Ω C41-3 (VC) - C141-99 (VCPE) Always Below 1 Ω C41-2 (GND) or C141-100 (EPEO) - Body ground and other terminals Always 10 kΩ or higher C41-1 (POUT) or C141-122 (PEO) - Body ground and other terminals Always 10 kΩ or higher C41-3 (VC) or C141-99 (VCPE) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG