AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-G 2.0]

2016 – MX-5 – Engine

1. Connect the M-MDS to the DLC–2.

2. Start the engine and warm it up completely.

3. Access the following PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

4. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 rpm or more.

5. Verify that the A/F sensor output current (PID: O2S11) is 0.25 mA or more while decelerating as shown in the figure.

WARNING:

A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

CAUTION:

Do not allow flammable objects such as the taping for bundling the wiring harness to come into contact with the exhaust system such as the exhaust manifold and silencer which reach high temperatures. Otherwise, it could cause fire damage.

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

2. Lift up the vehicle.

3. Remove the tire (FR). (See GENERAL PROCEDURES (SUSPENSION).)

4. Partially peel back the front mudguard No.2 (RH). (See FRONT MUDGUARD REMOVAL/INSTALLATION.)

5. Remove the front splash shield No.1 (RH). (See FRONT SPLASH SHIELD No.1 REMOVAL/INSTALLATION.)

6. Remove the front crossmember under cover. (See FRONT CROSSMEMBER UNDER COVER REMOVAL/INSTALLATION.)

8. Measure the resistance between A/F sensor terminals A and E.

A/F sensor heater resistance