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HO2S 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)
- O2S12 (HO2S output voltage)
- 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 HO2S output voltage (PID: O2S12) is 0.3 V or less
while decelerating as shown below.
Courtesy of MAZDA MOTORS CORP.