A/F Sensor inspection
- Warm up the engine to normal operating temperature.
- Access the following PIDs using the M-MDS: (See
ON-BOARD DIAGNOSTIC TEST
.)
- VSS (Vehicle speed)
- RPM (Engine speed)
- O2S11 (A/F sensor output current)
- Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3, 000 RPM or more.
- Verify that the A/F sensor current (PID: O2S11) is 0.25 mA
or more while decelerating as shown in the illustration.
- If not within the specification, replace the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION .)