Diagnostic Method
Detect the trouble by calculating the time from the beginning of the fuel cut to the beginning of the rear oxygen sensor voltage starting to drop.
Fig 1: Procedure For Calculating Time From Beginning Of Fuel Cut To Beginning Of Rear Oxygen Sensor Voltage Starting To Drop
- Abnormality Judgment
Judge as NG when the following conditions are established.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| Time when rear oxygen sensor voltage changed to 0.5 V after the fuel cut started. | > 4000 ms |
Time Needed for Diagnosis: 10 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| Time when rear oxygen sensor voltage changed to 0.5 V after the fuel cut started. | ≤ 4000 ms |
Time Needed for Diagnosis: 10 seconds