Function Explanation (DTC Detection Outline)
WARNING: This page is about a different variant/trim than selected.
- The PCM detects the oxygen concentration in the exhaust gas based on the A/F sensor signal. The PCM monitors the response speed of the A/F sensor to sudden changes in the oxygen concentration just after fuel cut control starts/ends. If the response speed of the A/F sensor is delayed, the PCM determines an A/F sensor malfunction and stores a DTC.
COMPONENT OPERATIONS
| Component No. | Refer to |
|---|---|
| 1 | Fuel cut control |
| 2 | During fuel cut |
| 3 | Normal injection |
| 4 | A/F sensor signal (normal) |
| 5 | Lean |
| 6 | λ=1 |
| 7 | Rich |
| 8 | Response speed in relation to change in oxygen concentration is normal |
| 9 | A/F sensor signal (abnormal) |
| 10 | Response speed in relation to change in oxygen concentration is slow |