Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001G70H
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): Engine Oil Level Sensor Circuit; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

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 signal.

HINT:

As the engine oil level may be unstable when the engine is cold or running at high speeds, the combination meter assembly receives the engine coolant temperature signal and engine speed signal from the ECM via CAN communication in order to prevent the oil level warnings from being output erroneously.

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.
  • 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 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

INSPECT ENGINE OIL LEVEL SENSOR

(a) Remove the engine oil level sensor.

Click here 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (LUBRICATION): OIL LEVEL SENSOR: REMOVAL

(b) Inspect the engine oil level sensor.

Click here 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (LUBRICATION): OIL LEVEL SENSOR: INSPECTION

NG

REPLACE ENGINE OIL LEVEL SENSOR

OK

2.

CHECK HARNESS AND CONNECTOR (ENGINE OIL LEVEL SENSOR - COMBINATION METER ASSEMBLY)

(a) Disconnect the I5 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) - I5-31 (OILW)

Always

Below 1 Ω

C37-1 (LOIL) or I5-31 (OILW) - Body ground

Always

10 kΩ or higher
OK

REPLACE COMBINATION METER ASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR