P0447
G : P0447. Canister Close Valve Circuit Open Circuit.
G1 : CHECK SUPPLY VOLTAGE TO CCV.
1. Disconnect canister close valve electrical connector, CA270.
2. Turn the ignition switch to the ON position.
3. Measure the voltage at CA270, pin 1 (GU)
Is the voltage greater than 10 volts?
Yes
Goto G2
No
REPAIR the circuit between CA270, 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
G2 : CHECK THE CCV SIGNAL WIRE FOR CONTINUITY.
1. Disconnect the PCM electrical connector, PI01.
2. Measure the resistance between PI01, pin 67 (O) and CA270, pin 2 (O)
Is the resistance less than 5 Ohms?
Yes
Goto G4
No
REPAIR the circuit between PI01, pin 67 (O) and CA270, pin 2 (O) 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
G3 : CHECK THE CCV SIGNAL WIRE FOR SHORT TO BATTERY
1. Turn the ignition switch to the ON position.
2. Check for a voltage at CA270, pin 2 (O)
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 G4
G4 : CHECK THE CCV RESISTANCE
1. Check the resistance between pins 1 and 2 of the CCV.
Is the resistance 25 to 30 Ohms at 68 degrees F (20 degrees C)?
Yes
INSTALL a new PCM.
No
INSTALL a new CCV. 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