Oxygen Sensor Diagnosis
Diagnose the fuel control heated oxygen sensors for the following conditions:
- Heater performance, time to activity on cold start
- Slow response
- Response time, time to switch R/L or L/R
- Inactive signal, output steady at bias voltage-approximately 450 mV
- Signal fixed high
- Signal fixed low
Diagnose the catalyst monitor heated oxygen sensors for the following functions:
- Heater performance, time to activity on cold start
- Signal fixed low during steady state conditions
- Inactive sensor