Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001EVA8
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 -           ]
Title: A25A-FKS (ENGINE CONTROL): AIR FUEL RATIO SENSOR: INSPECTION; 2019 - 2025 MY RAV4 [11/2018 -        ]

INSPECTION

PROCEDURE

1. INSPECT AIR FUEL RATIO SENSOR

(a) for Sensor 1:

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (HA1A) - 2 (+B)

20°C (68°F)

1.6 to 3.2 Ω

1 (HA1A) - 4 (A1A-)

Always

10 kΩ or higher

If the result is not as specified, replace the air fuel ratio sensor.

*a

Component without harness connected

(Air Fuel Ratio Sensor)

(b) for Sensor 2:

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (HA1B) - 2 (+B)

20°C (68°F)

2 to 6 Ω

1 (HA1B) - 4 (A1B-)

Always

10 kΩ or higher

If the result is not as specified, replace the air fuel ratio sensor.

*a

Component without harness connected

(Air Fuel Ratio Sensor)