General Information: DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSES
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Evaluate O2 sensor element temperature via measuring element resistance.
|
- Related fuse blown or missing
- Heater control circuit open or short
- Power supply circuit open or short
- Contact resistance in connectors
- Faulty HO2S
|
| Enable Conditions |
- Nominal O2 sensor heating phase
- 1% < O2 sensor heater power < 80%
- Time after start elapsed (to perform OBD1 diag): 240 sec.
- Exhaust gas temp. model < 650°C (1202°F)
- No relevant failure
- 11V < Battery voltage < 16V
|
|
| Threshold Value |
- O2 sensor element resistance > 1100Ω (element temperature < 550°C (1022°F))
|
| Diagnostic Time |
|
| Fail Safe |
|