P0444

D : P0444. EVAPORATIVE PURGE VALVE CIRCUIT OPEN CIRCUIT

D1 : CHECK SUPPLY VOLTAGE TO EVAPORATIVE PURGE VALVE

1. Disconnect Evaporative purge valve electrical connector, JB170.
2. Turn the ignition switch to the ON position.
3. Measure the voltage at JB170, pin 1 (GU).

Is the voltage greater than 10 volts?
Yes
Goto D2

No
REPAIR the circuit between Evaporative purge valve electrical connector, JB170, 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' above.

D2 : CHECK THE EVAPORATIVE PURGE VALVE SIGNAL WIRE FOR CONTINUITY

1. Disconnect the PCM electrical connector, EN16.
2. Measure the resistance between EN16, pin 66 (UY) and JB170, pin 2 (UY).

Is the resistance less than 5 ohms?
Yes
Goto D3

No
REPAIR the circuit between EN16, pin 66 (UY) and JB170, 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' above.

D3 : CHECK THE EVAPORATIVE PURGE VALVE SIGNAL WIRE FOR SHORT TO GROUND

1. Measure the resistance between JB170, 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' above.

No
Goto D4

D4 : CHECK THE EVAPORATIVE PURGE VALVE SIGNAL WIRE FOR SHORT TO BATTERY

1. Connect the PCM electrical connector, EN16.
2. Turn the ignition switch to the ON position.
3. CHECK for a voltage at JB170, 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' above.

No
Goto D5

D5 : CHECK THE EVAPORATIVE PURGE VALVE RESISTANCE

1. CHECK the resistance between pins 1 and 2 of the Evaporative purge valve.

Is the resistance 30 to 34 ohms at 20 degrees C (68 degrees F)?
Yes
INSTALL a new PCM. Before replacing a PCM, contact Dealer technical support.

No
INSTALL a new Evaporative 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' above.