M20C-FKS ENGINE CONTROL SFI SYSTEM P052477 Engine Oil Pressure Too Low (Severe) P15F009 Engine Oil Pressure Too Low (Moderate) P15F077 Engine Oil Pressure Too Low (Minor) P15F109 Variable Oil Pump Component Failure P15F177 Variable Oil Pump Commanded Position Not Reachable
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 ECM drives the oil pressure control valve assembly based on the oil pressure measured by the oil pressure sensor. The oil pressure is controlled by operating the oil pressure control valve assembly to regulate the amount of discharge oil.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P052477 | Engine Oil Pressure Too Low (Severe) | When the engine is running, the oil pressure value output from the oil pressure sensor is less than the target value (1 trip detection logic). | ·
Oil pressure control valve assembly ·
Oil pump assembly ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
The engine oil level is low ·
The engine oil has deteriorated ·
ECM |
Comes on | DTC stored | SAE: P0524 |
| P15F009 | Engine Oil Pressure Too Low (Moderate) | When the engine is running, the oil pressure value output from the oil pressure sensor is less than the target value (1 trip detection logic). | ·
Oil pressure control valve assembly ·
Oil pump assembly ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
The engine oil level is low ·
The engine oil has deteriorated ·
ECM |
- | DTC stored | SAE: P15F0 |
| P15F077 | Engine Oil Pressure Too Low (Minor) | When the engine is running, the oil pressure value output from the oil pressure sensor is less than the target value (1 trip detection logic). | ·
Oil pressure control valve assembly ·
Oil pump assembly ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
The engine oil level is low ·
The engine oil has deteriorated ·
ECM |
- | DTC stored | SAE: P15F0 |
| P15F109 | Variable Oil Pump Component Failure | When the piston oil jets are spraying oil (engine speed is 3000 rpm or more), the oil pressure is less than specified (1 trip detection logic). | ·
Oil pressure control valve assembly ·
Oil pump assembly ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
The engine oil level is low ·
The engine oil has deteriorated ·
ECM |
- | DTC stored | SAE: P15F1 |
| P15F177 | Variable Oil Pump Commanded Position Not Reachable | When the engine is running, the target value and the value output by the oil pressure sensor differ by more than the threshold (1 trip detection logic). | ·
Oil pressure control valve assembly ·
Oil pump assembly ·
Oil pressure sensor (engine oil pressure and temperature sensor) ·
The engine oil level is low ·
The engine oil has deteriorated ·
ECM |
- | DTC stored | SAE: P15F1 |
| DTC No. | Data List/Freeze Frame Data |
|---|---|
| P052477 | ·
Engine Speed ·
Engine Oil Temperature Sensor ·
Coolant Temperature ·
Engine Oil Pressure ·
Engine Oil Pressure Control Valve ·
Target Engine Oil Pressure |
| P15F009 | |
| P15F077 | |
| P15F109 | |
| P15F177 |
MONITOR DESCRIPTION
- P052477, P15F009, P15F077 and P15F177:
-
The ECM monitors the oil pressure based on the signal output from the oil pressure sensor. If it is judged that the actual oil pressure generated by the oil pump assembly is less than the target oil pressure, oil pressure control using the oil pressure control valve assembly is suspended. After a certain period of time has elapsed, if it is judged that the actual oil pressure is low in comparison to the target oil pressure, it is determined that the oil pressure is low and a DTC is stored.
- P15F109:
-
The ECM monitors the oil pressure based on the signal output from the oil pressure sensor. If the oil pressure is less than specified when the piston oil jets are spraying oil (engine speed is 3000 rpm or more), a DTC is stored.
MONITOR STRATEGY
| Required Sensors/Components | Oil pressure sensor |
| Frequency of Operation | Once per driving cycle |
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.
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off [A].
When the vehicle is stationery, gradually depress the accelerator pedal to increase the engine speed to 4000 rpm over a 30 second period, run the engine speed at 4000 rpm for 1 minute, then release the accelerator pedal to return to the idling speed [B].
Repeat step [B] 3 times or more [C].
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
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: P052477, P15F009, P15F077, P15F109 or P15F177.
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.
·If the judgment result is INCOMPLETE, perform steps [B] through [D] again.
·[A] to [D]: 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
Refer to DTC P06DA13.
CAUTION / NOTICE / HINT
- HINT:
- ·
When DTC P052477 is stored, it is determined that the engine oil pressure is low (severe) and the maximum engine speed is limited.
·When DTC P15F009 is stored, it is determined that the engine oil pressure is low (moderate) and the maximum engine speed is limited.
·When DTC P15F077 is stored, it is determined that the engine oil pressure is low (minor) and the maximum engine speed is limited.
·If the engine oil level is sufficient but a low engine oil level DTC is output, confirm with the customer whether engine oil was added after the vehicle had been driven with a low engine oil level.
·A DTC may be stored if the engine oil in the oil passages was contaminated with foreign matter, etc., in the past, as the ECM performs compulsory control of the oil pressure control valve assembly to remove foreign matter from the oil pressure control valve assembly.
·If an incorrect engine oil viscosity is used, a DTC related to low oil pressure, etc., may be stored.
·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.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTC P052477, P15F009, P15F077, P15F109 and/or P15F177 is output A DTC P052477, P15F009, P15F077, P15F109 and/or P15F177 and other DTCs are output B
- HINT:
-
If any DTCs other than P052477, P15F009, P15F077, P15F109 and/or P15F177 are output, troubleshoot those DTCs first.
A
B
Check the engine oil level.
Check the state of the oil level warning.
- Result:
Result Proceed to Engine oil level is within the specified range and oil level warning is not displayed A Engine oil level is low and oil level warning light (indicator) is displayed B
- HINT:
-
If the oil level warning is not displayed even though the engine oil level is below the Low mark, or the oil level warning is displayed even though the engine oil level is within the specified range, inspect the oil level sensor and related parts.
A
B
Check the engine oil quality.
Check that the engine oil is not contaminated with water, deteriorated, discolored or excessively thin.
- OK:
The engine oil is not contaminated with water, deteriorated, discolored or excessively thin.
- Result:
Proceed to OK NG
OK
NG
Replace the engine oil.
- HINT:
-
If the oil filter has exceeded the replacement period, replace the oil filter at the same time.
- Result:
Proceed to NEXT
NEXT
Check for engine oil leaks.
- OK:
There are no engine oil leaks.
- HINT:
-
If there are engine oil leaks, perform the following steps after repairing or replacing the malfunctioning parts.
- Result:
Proceed to NEXT
NEXT
Add engine oil.
- NOTICE:
-
Do not add engine oil to above the full level mark.
- Result:
Proceed to NEXT
NEXT
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
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
- Result:
Result Proceed to DTC P052477, P15F009, P15F077, P15F109 and/or P15F177 is output A DTCs are not output B
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Engine Oil Temperature Sensor and Engine Oil Pressure.
- Powertrain > Engine > Data List
-
Tester Display Engine Speed Engine Oil Temperature Sensor Engine Oil Pressure - 50003 372 211,261,103
Start the engine and warm it up until the engine oil temperature is 75 to 85°C (167 to 185°F).
According to the display on the GTS, read the Data List.
| Engine Speed | Engine Oil Temperature Sensor | Engine Oil Pressure |
|---|---|---|
| 1000 rpm | 75 to 85°C (167 to 185°F) | 80 kPa(gauge) [12 psi(gauge)] or higher |
| 2000 rpm | 80 kPa(gauge) [12 psi(gauge)] or higher | |
| 3000 rpm | 200 kPa(gauge) [29 psi(gauge)] or higher |
- Result:
Proceed to OK NG
OK
NG
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Active Test / Activate the Engine Oil Pressure Control Valve.
- Powertrain > Engine > Active Test
-
Tester Display Activate the Engine Oil Pressure Control Valve - 50004 372 59
Set the Active Test item "Activate the Engine Oil Pressure Control Valve" to 900.00 mA and confirm that the oil pressure control valve assembly makes an operation sound when the oil pressure control valve assembly connector is disconnected and reconnected.
- OK:
An operation sound can be heard
- HINT:
- ·
Be sure to clear the DTCs after performing the inspection as DTCs may be stored when the oil pressure control valve assembly connector disconnected.
·As the maximum operating current of the oil pressure control valve is 1000 mA, it is necessary to operate the oil pressure control valve within this range when setting the Active Test item "Activate the Engine Oil Pressure Control Valve" (If the Active Test request value exceeds 1000 mA, the Active Test will be suspended).
·If the Active Test value exceeds 1000 mA, reselect the value as the Active Test will be suspended.
- Result:
Proceed to OK NG
OK
NG
Disconnect the oil pressure control valve assembly connector.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Engine Oil Temperature Sensor and Engine Oil Pressure.
- Powertrain > Engine > Data List
-
Tester Display Engine Speed Engine Oil Temperature Sensor Engine Oil Pressure - 50003 372 211,261,103
Start the engine and warm it up until the engine oil temperature is 75 to 85°C (167 to 185°F).
According to the display on the GTS, read the Data List.
| Engine Speed | Engine Oil Temperature Sensor | Engine Oil Pressure |
|---|---|---|
| 1000 rpm | 75 to 85°C (167 to 185°F) | 100 kPa(gauge) [15 psi(gauge)] or higher |
| 2000 rpm | 200 kPa(gauge) [29 psi(gauge)] or higher | |
| 3000 rpm | 300 kPa(gauge) [44 psi(gauge)] or higher |
- HINT:
- ·
By disconnecting the oil pressure control valve assembly connector, the non-regulated oil pressure can be measured.
·Be sure to clear the DTCs after performing the inspection as DTCs may be stored when the oil pressure control valve assembly connector disconnected.
- Result:
Proceed to OK NG
OK
NG
Install the oil pressure gauge with adapter.
Disconnect the oil pressure control valve assembly connector.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Engine Speed and Coolant Temperature.
- Powertrain > Engine > Data List
-
Tester Display Engine Speed Coolant Temperature - 50003 372 211,205
- HINT:
-
When the engine oil pressure and temperature sensor is removed, the engine oil temperature cannot be checked, so refer to "Coolant Temperature".
Maintain "Coolant Temperature" at 90 to 95°C (194 to 203°F) for 3 minutes, and then read the oil pressure gauge value at 1000 rpm, 2000 rpm and 3000 rpm.
- HINT:
- ·
Race the engine as necessary to maintain "Coolant Temperature" at 90 to 95°C (194 to 203°F).
·If maintained for 3 minutes or more, the engine oil temperature may exceed 85°C (185°F).
| Engine Speed | Coolant Temperature | Engine oil pressure gauge value |
|---|---|---|
| 1000 rpm | Maintained at 90 to 95°C (194 to 203°F) for 3 minutes
(Reference) Engine oil temperature: 75 to 85°C (167 to 185°F) |
100 kPa (1.0 kgf/cm2, 15 psi) or higher |
| 2000 rpm | 200 kPa (2.0 kgf/cm2, 29 psi) or higher | |
| 3000 rpm | 300 kPa (3.1 kgf/cm2, 44 psi) or higher |
- HINT:
-
Be sure to clear the DTCs after reinstalling the oil pressure sensor (engine oil pressure and temperature sensor) or reconnecting the oil pressure sensor (engine oil pressure and temperature sensor) or oil pressure control valve assembly connector, as DTCs may be stored.
- Result:
Proceed to OK NG
OK
NG
Inspect the oil pressure control valve assembly.
- Result:
Proceed to OK NG
OK
NG
Disconnect the oil pressure control valve 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 C22-1 (OCV+) - C71-27 (VOP+) Always Below 1 Ω C22-2 (OCV-) - C71-53 (VOP-) Always Below 1 Ω C22-1 (OCV+) or C71-27 (VOP+) - Body ground and other terminals Always 10 kΩ or higher C22-2 (OCV-) or C71-53 (VOP-) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG