NR Series ENGINE CONTROL SFI SYSTEM P052012 Engine Oil Pressure Sensor/Switch "A" Circuit Short to Battery
DESCRIPTION
The oil pump is a variable discharge type. The oil pump maintains the oil pressure in the required for VVT operation at low engine speeds and for lubrication at high engine speeds, and reduces friction to lower excess oil pressure at middle engine speeds. The oil pressure sender gauge assembly detects the engine oil pressure.
The oil pressure sender gauge assembly is a semiconductor type pressure sensor whose characteristic resistance changes when pressure is applied. Through this the engine oil pressure is converted into an output voltage which is then 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 | Diagnosis Condition:
·
Ignition switch ON Abnormal condition: ·
The oil pressure sender gauge assembly output voltage is higher than 4.78 V. Malfunction Time: ·
5 seconds or more Trip logic: ·
1 trip detection logic Detection Conditions: ·
Continuous Sensors/components used for detection: ·
Oil pressure sender gauge assembly |
·
Open or short in oil pressure sender gauge assembly circuit ·
Oil pressure sender gauge assembly ·
ECM |
Comes on | DTC stored | SAE Code:
P0523 |
MONITOR DESCRIPTION
When the ignition switch is turned to ON and the output voltage of the oil pressure sender gauge assembly is higher than 4.78 V for 5 seconds or more, the ECM determines that the oil pressure sender gauge assembly circuit is malfunctioning and illuminates the MIL and stores a DTC.
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.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher with all the accessories switches turned off [A].
Turn the GTS on.
With the vehicle is stationary, gently depress the accelerator pedal and maintain an engine speed of 4000 rpm for 1 minute, then release the accelerator pedal and return to the engine idling [B].
Repeat step [B] 3 times or more.
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.
Proceed to the next screen and enter the DTC to be checked.
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.
·If the judgment result shows INCOMPLETE, perform the Confirmation Driving Pattern and check the DTC judgment result again.
·[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 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
- 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
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
Turn the ignition switch off and wait for at least 30 seconds.
- Result:
Proceed to NEXT
NEXT
- 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 sender gauge assembly connector.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- HINT:
-
When the ECM, wire harnesses and connectors are normal, DTC P052014 will be stored when the connector of the sensor is disconnected.
- Result:
Result Proceed to DTC P052014 is output A DTC P052012 is output B
A
B
Disconnect the oil pressure sender gauge assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C40-1 (E2) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the oil pressure sender gauge assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C40-1 (E2) - C78-129 (EPEO) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Oil Pressure Sender Gauge Assembly) |
Disconnect the oil pressure sender gauge assembly 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 C40-2 (PEO) - Body ground Ignition switch ON 0.5 to 4.5 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the oil pressure sender gauge assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C40-3 (VC) - C40-2 (PEO) or C78-130 (VCPE) - C78-98 (PEO) Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Disconnect the oil pressure sender gauge assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C40-2 (PEO) or C78-98 (PEO) - Other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG