| Last Modified: 12-11-2024 | 6.11:8.1.0 | Doc ID: RM100000002QLMT |
| Model Year Start: 2025 | Model: GR Corolla | Prod Date Range: [09/2024 - ] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): Engine Oil Level Sensor Circuit; 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2024 - ] | ||
|
Engine Oil Level Sensor Circuit |
DESCRIPTION
The combination meter assembly and engine oil level sensor are connected via direct line. The combination meter assembly determines the engine oil level based on the engine oil level sensor status signal.
HINT:
The coolant temperature signal and engine speed signal is sent from the ECM to the combination meter assembly via CAN communication. Because an accurate engine oil level cannot be detected when the engine is cold or operating at high speeds, warning control is only performed after the engine is warmed up and the engine is stopped or idling.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
-
When replacing the combination meter assembly, update the ECU security key.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY](/t3Portal/stylegraphics/info.gif)
-
The following troubleshooting procedure is based on the assumption that the SFI system is normal. Confirm that the SFI system is not malfunctioning before performing the following procedure.
Click here
PROCEDURE
|
1. |
CHECK ENGINE OIL |
(a) Check the engine oil level and engine oil quality is normally .
Click here
| NG |
|
REPLACE OR ADD ENGINE OIL |
|
|
2. |
READ VALUE USING GTS |
(a) 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 |
Proceed to |
|---|---|
|
The Data List item changes correctly |
A |
|
The Data List item do not change correctly |
B |
| A |
|
|
|
3. |
INSPECT ENGINE OIL LEVEL SENSOR |
Click here
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (ENGINE OIL LEVEL SENSOR - COMBINATION METER ASSEMBLY) |
(a) Disconnect the I4 combination meter assembly connector.
(b) 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 |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|