Code Enable Criteria
Conditions for running DTC:
- Engine has been running at idle for at least one minute.
- Vehicle accelerates from a stop at least 5 seconds, after idling for one minute.
Conditions for setting DTC:
- Resistor voltage is less than 2.5 volts for 5 seconds with heater off.
- Resistor voltage is greater than .3 volt for 5 seconds with heater on.
- Either conditions are present for 5 seconds.