P0443 Evaporative Emission System Purge Control Valve Circuit
To judge if there is open circuit in the evaporative emission purge solenoid drive circuit, the PCM measures the surge voltage of the evaporative emission ventilation solenoid coil.
Check Conditions
Engine is being cranked.
Battery positive voltage is at between 10 and 16 volts.
Judgment Criteria
The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) is not detected for 0.2 second.
The PCM monitors for this condition once during the drive cycle.
Check Conditions
Battery positive voltage is at between 10 and 16 volts.
ON duty cycle of the evaporative emission purge solenoid is between 10 and 90 percent.
Evaporative emission ventilation solenoid is OFF.
More than 1 second has elapsed after the above mentioned conditions have been met.
Judgment Criteria
The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) is not detected for 1 second. When the evaporative emission purge solenoid is turned OFF.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
- Evaporative emission purge solenoid failed.
- Open or shorted evaporative emission purge solenoid circuit, or loose connector.
- PCM failed.
To judge if there is open circuit in the evaporative emission purge solenoid drive circuit, the PCM measures the surge voltage of the evaporative emission ventilation solenoid coil.
Check Conditions
Engine is being cranked.
Battery positive voltage is at between 10 and 16 volts.
Judgment Criteria
The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) is not detected for 0.2 second.
The PCM monitors for this condition once during the drive cycle.
Check Conditions
Battery positive voltage is at between 10 and 16 volts.
ON duty cycle of the evaporative emission purge solenoid is between 10 and 90 percent.
Evaporative emission ventilation solenoid is OFF.
More than 1 second has elapsed after the above mentioned conditions have been met.
Judgment Criteria
The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) is not detected for 1 second. When the evaporative emission purge solenoid is turned OFF.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
- Evaporative emission purge solenoid failed.
- Open or shorted evaporative emission purge solenoid circuit, or loose connector.
- PCM failed.