Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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 ON/OFF 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.

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PROCEDURE

1.

INSPECT ENGINE OIL LEVEL SENSOR

(a) Remove the engine oil level sensor.

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(b) Inspect the engine oil level sensor.

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NG

REPLACE ENGINE OIL LEVEL SENSOR

OK

2.

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

(a) Disconnect the G16 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C34-1 - G16-27 (OILW)

Always

Below 1 Ω

C34-1 or G16-27 (OILW) - Body ground

Always

10 kΩ or higher

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Engine Coolant Temperature Receiver Gauge Malfunction

    Entire Combination Meter does not Operate

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