A/F Sensor Inspection
- Warm up the engine to normal operating temperature.
- Drive the vehicle.
- Release the accelerator pedal while the engine speed is at 3,000 rpm or more
and verify that the following monitor items fluctuate as shown in the figure while the vehicle decelerates. (See ON-BOARD DIAGNOSTIC TEST
.)
- VSS
- RPM
- O2S11, O2S21
- If not within the specification, replace the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION .)