Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001GK9C
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 04/2020]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): Engine Oil Pressure Switch Circuit; 2020 MY Corolla Corolla HV [01/2019 - 04/2020]

Engine Oil Pressure Switch Circuit

DESCRIPTION

The combination meter assembly and engine oil pressure switch assembly are connected via direct line. The combination meter assembly determines the engine oil pressure based on the engine oil pressure switch signal.

HINT:

  • The combination meter assembly receives various signals in order to output warnings from the ECM and hybrid vehicle control ECU via CAN communication.
  • The combination meter assembly operates the following to output oil pressure warnings:
    1. Engine oil pressure warning buzzer
    2. Engine oil pressure warning message on multi-information display

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 and hybrid control system are normal. Confirm that the SFI system and hybrid control system are not malfunctioning before performing the following procedure.

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

    Hybrid control system: Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

INSPECT ENGINE OIL PRESSURE SWITCH ASSEMBLY

(a) Inspect the engine oil pressure switch assembly.

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

NG

REPLACE ENGINE OIL PRESSURE SWITCH ASSEMBLY

OK

2.

CHECK HARNESS AND CONNECTOR (ENGINE OIL PRESSURE SWITCH ASSEMBLY - 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

C39-1 (S) - I5-23 (S)

Always

Below 1 Ω

C39-1 (S) or I5-23 (S) - 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