Diagnostic Method
- Exhaust temperature diagnosis
Abnormality Judgment
When the diagnostic execution conditions are established, calculate the estimated exhaust temperature.
Judge as NG if the following conditions are established within 14 seconds after starting the engine.
Judgment Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Estimated exhaust temperature | < Value from Map 1 |
Map 1
| Coolant temperature at engine start | -40°C (-40°F) | -30°C (-22°F) | -20°C (-4°F) | -10°C (14°F) | 0°C (32°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) | 50°C (122°F) |
| Threshold Value | 200°C (392°F) | 200°C (392°F) | 200°C (392°F) | 200°C (392°F) | 200°C (392°F) | 200°C (392°F) | 180°C (356°F) | 180°C (356°F) | 180°C (356°F) | 180°C (356°F) |
Time Needed for Diagnosis: 14 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles. Normality Judgment
Judge as OK when the following conditions are established after predetermined amount of time has passed.
Judgment Value
| Malfunction Criteria | Threshold Value |
|---|---|
| Estimated exhaust temperature | ≥ Value from Map 1 |
- Idle speed diagnosis
Judge as NG when all the following conditions are established and judge as OK when not met.
| Malfunction Criteria | Threshold Value |
|---|---|
| Continuous time of (target engine RPM - engine RPM > 100) | ≥ 10000 milliseconds |
| Continuous time when (actual retard amount > 5°CA) | ≥ 3000 milliseconds |
Time Needed for Diagnosis: 6 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.