Engine Oil Level Sensor Circuit [09/2024 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2025 Toyota GR Corolla, 2025 Toyota Corolla, 2024 Toyota GR Corolla, 2024 Toyota Corolla, and 2023 Toyota GR Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ENGINE OIL
- Check the engine oil level and engine oil quality is normally.
Refer to ON-VEHICLE INSPECTION [08/2023 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE OR ADD ENGINE OIL
Result:
OK
See step 2
- Check the engine oil level and engine oil quality is normally.
- READ VALUE USING GTS
- Read the Data List according to the display on the GTS.
Body Electrical > Combination Meter > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Oil Level Switch Engine oil level sensor input OFF or ON OFF: Engine oil level not low
ON: Engine oil level low- Body Electrical > Combination Meter > Data List
Tester Display Oil Level Switch Result
Result Proceed to The Data List item changes correctly A The Data List item do not change correctly B
Result:
A
REPLACE COMBINATION METER ASSEMBLY
Refer to REMOVAL [09/2024 - ]
Result:
B
See step 3
- Read the Data List according to the display on the GTS.
- INSPECT ENGINE OIL LEVEL SENSOR
Refer to INSPECTION [01/2019 - ]
Result
Proceed to OK NG Result:
NG
REPLACE ENGINE OIL LEVEL SENSOR
Refer to REMOVAL [01/2019 - ]
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (ENGINE OIL LEVEL SENSOR - COMBINATION METER ASSEMBLY)
- Disconnect the I4 combination meter assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C37-1 (LOIL) - I4-14 (OILW) Always Below 1 Ω C37-1 (LOIL) or I4-14 (OILW) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE COMBINATION METER ASSEMBLY
Refer to REMOVAL [09/2024 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR