Oxygen Sensor Diagnosis

Diagnose the fuel control heated oxygen sensors for the following conditions:
^ The heater performance-the time to activity during a cold start
^ A slow response
^ The response time-the time to switch R/L or L/R
^ The inactive signal-the output should steady at a bias voltage of approximately 450 mV
^ A signal fixed high
^ A signal fixed low

Diagnose the catalyst monitor heated oxygen sensors for the following functions:
^ The heater performance-the time to activity during a cold start
^ A signal fixed low during steady state conditions
^ An inactive sensor.