P0448

H : P0448. CCV Circuit Shorted.

H1 : CHECK CCV SIGNAL WIRE FOR SHORT TO GROUND.
1. Disconnect CCV electrical connector, CA270.
2. Disconnect PCM electrical connector, PI01.
3. Measure the resistance between CA270, pin 2 (O) 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
NO short found. A short in the CCV supply circuit may result in a blown fuse 36, PDFB. See initial checks.