P0444

D : P0444. EVAP/Purge Valve Circuit Open Circuit.

D1 : CHECK SUPPLY VOLTAGE TO EVAP/PURGE VALVE.
1. Disconnect EVAP/purge valve electrical connector, FH111.
2. Turn the ignition switch to the ON position.
3. Measure the voltage at FH111, pin 1 (GU).

Is the voltage greater than 10 volts?

Yes
Goto D2

No
REPAIR the circuit between EVAP/purge valve electrical connector, FH111, pin 1 (GU) and the EMS control relay. For additional information, refer to wiring diagrams. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. Recheck DTCs. For additional information, see 'diagnostic drive cycles'. Diagnostic Drive Cycles

D2 : CHECK THE EVAP/PURGE VALVE SIGNAL WIRE FOR CONTINUITY.
1. Disconnect the PCM electrical connector, PI01.
2. Measure the resistance between PI01, pin 66 (UY) and FH111, pin 2 (UY).

Is the resistance less than 5 Ohms?

Yes
Goto D3

No
REPAIR the circuit between PI01, pin 66 (UY) and FH111, pin 2 (UY). CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. Recheck DTCs. For additional information, see 'diagnostic drive cycles'. Diagnostic Drive Cycles

D3 : CHECK THE EVAP/PURGE VALVE SIGNAL WIRE FOR SHORT TO GROUND
1. Measure the resistance between FH111, pin 2 (UY) and GROUND.

Is the resistance less than 10,000 Ohms?

Yes
REPAIR the short to ground. For additional information, refer to wiring diagrams. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. Recheck DTCs. For additional information, see 'diagnostic drive cycles'. Diagnostic Drive Cycles

No
Goto D4

D4 : CHECK THE EVAP/PURGE VALVE SIGNAL WIRE FOR SHORT TO BATTERY
1. Connect the PCM electrical connector, PI01.
2. Turn the ignition switch to the ON position.
3. Check for a voltage at FH111, pin 2 (UY).

Is the voltage greater than 1 volt?

Yes
REPAIR the short to battery. For additional information, refer to wiring diagrams. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. Recheck DTCs. For additional information, see 'diagnostic drive cycles'. Diagnostic Drive Cycles

No
Goto D5

D5 : CHECK THE EVAP/PURGE VALVE RESISTANCE.
1. Check the resistance between pins 1 and 2 of the EVAP/purge valve.

Is the resistance 30 to 34 Ohms at 68 degrees F (20 degrees C)?

Yes
INSTALL a new PCM.

No
INSTALL a new EVAP/purge valve. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. Recheck DTCs. For additional information, see 'diagnostic drive cycles'. Diagnostic Drive Cycles