General Information: DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSES
| Item |
Detecting Condition |
Possible Cause |
|
| Case 1) |
DTC Strategy |
- Signal plausibility during fuel cut off
|
- Related fuse blown or missing
- Contact resistance in connectors
- HO2S contamination
|
| Enable Conditions |
- O2 sensor operative readiness
- Nominal heating phase
- Fuel cut-off phase
- 20 g (0.04 lb) < Integrated mass air flow since begin < 60 g (0.13 lb)
- No relevant failure
- Battery voltage > 10V
|
|
| Threshold Value |
- Voltage during fuel cut off phase > 0.2V
|
| Diagnostic Time |
|
| Case 2) |
DTC Strategy |
- Signal stuck check (Rationality check)
|
|
| Enable Conditions |
- O2 sensor operative readiness
- Nominal heating phase
- Catalyst temperature model > 350°C (662°F)
- Integrated MAF in fuel cut-off > 18 g (0.039 lb)
- Integrated MAF after fuel cut-off > 40 g (0.088 lb)
- No relevant failure
- Battery voltage > 10V
|
|
| Threshold Value |
- Signal voltage increase < 10mV (between fuel cut-off and after fuel cut-off)
|
| Diagnostic Time |
|