NR Series ENGINE CONTROL SFI SYSTEM P019511 Engine Oil Temperature Sensor Circuit Short to Ground
DESCRIPTION
A thermistor, whose resistance changes in accordance with the engine oil temperature, is built into the engine oil temperature sensor. As the engine oil temperature decreases, the thermistor resistance increases and as the engine oil temperature increases, the thermistor resistance decreases. The engine oil temperature sensor is connected to the ECM. A voltage of 5 V is supplied from terminal THEO via resistor R of the ECM. Since resistor R and the engine oil temperature sensor are connected in series, both the resistance and the electrical potential of THEO are subjected to change in accordance with a change in the engine oil temperature.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P019511 | Engine Oil Temperature Sensor Circuit Short to Ground | Diagnosis Condition:
·
Ignition switch ON Abnormal condition: ·
The engine oil temperature sensor output voltage is less than 0.13 V. Malfunction Time: ·
5 seconds or more Trip logic: ·
1 trip detection logic Detection Conditions: ·
Continuous Sensors/components used for detection: ·
Engine oil temperature sensor |
·
Short in engine oil temperature sensor circuit ·
Engine oil temperature sensor ·
ECM |
Comes on | DTC stored | SAE Code:
P0197 |
- HINT:
-
When this DTC is output, check the engine oil temperature in the Data List. Enter the following menus: Powertrain / Engine / Data List / Engine Oil Temperature Sensor.
DTC No. Engine Oil Temperature Sensor Malfunction P019511 Higher than 156°C (313°F) Short to ground in THEO circuit
-
If the Data List values is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.
MONITOR DESCRIPTION
When the ignition switch is turned to ON and the output voltage of the engine oil temperature sensor is less than 0.13 V for 5 seconds or more, the ECM determines that the engine oil temperature sensor circuit is malfunctioning 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.
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.
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.
·[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
| *1 | Engine Oil Temperature Sensor |
| *2 | ECM |
Disconnect the engine oil temperature sensor 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 Oil Temperature Sensor.
- Powertrain > Engine > Data List
-
Tester Display Engine Oil Temperature Sensor - 50003 372 261
Read the value displayed on the GTS.
- OK:
GTS Display Specified Condition Engine Oil Temperature Sensor -40°C (-40°F)
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine oil temperature sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Production Date from 2020/07 to 2021/11 Tester Connection Condition Specified Condition C42-2 or C78-97 (THEO) - Body ground and other terminals Always 10 kΩ or higher
Production date from 2021/11 Tester Connection Condition Specified Condition C145-2 or C78-97 (THEO) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG