P0448

: DTC P0448; CANISTER CLOSE VALVE (CCV) CIRCUIT MALFUNCTION, OPEN /SHORT CIRCUIT

G307413t8 : CHECK THE CANISTER CLOSE VALVE POWER SUPPLY
1. Disconnect the CCV electrical connector, CV02.
2. Turn the ignition switch to the ON position.
Make sure the EMS relay is energized.
3. Measure the voltage between CV02, pin 02 (GU) and GROUND.

- Is the voltage greater than 10 volts?

-> Yes

-> No
REPAIR the circuit between the CCV and battery. This circuit includes the front power distribution box, fuse 14, the EMS relay and the high power protection module. CLEAR the DTC. Carry out a full evaporative system monitor drive cycle.

G307413t9 : CHECK THE CANISTER CLOSE VALVE POWER SUPPLY CIRCUIT FOR SHORT CIRCUIT
1. Turn the ignition switch to the OFF position.
2. Measure the voltage between CV02, pin 02 (GU) and GROUND.

- Is the voltage greater than 3 volts?
-> Yes
REPAIR the short circuit. CLEAR the DTC. Carry out a full evaporative system monitor drive cycle.

-> No

G307413t10 : CHECK THE CANISTER CLOSE VALVE DRIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Measure the resistance between CV02, pin 01 (O) and PI01, pin 67 (O).

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. Carry out a full evaporative system monitor drive cycle.

-> No

G307413t11 : CHECK THE CANISTER CLOSE VALVE DRIVE CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Reconnect the battery negative terminal.
2. Measure the voltage between CV02, pin 01 (O) and GROUND.

- Is the voltage greater than 3 volts?

-> Yes
REPAIR the short circuit. CLEAR the DTC. Carry out a full evaporative system monitor drive cycle.

-> No

G307413t12 : CHECK THE CANISTER CLOSE VALVE DRIVE CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between CV02, pin 01 (O) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC. Carry out a full evaporative system monitor drive cycle.

-> No
INSTALL a new CCV. CLEAR the DTC. Carry out a full evaporative system monitor drive cycle.