DTC P0443 (CPC): EVAP Emission Control System Purge Control Valve Circuit Low Input

Turn ignition on. Using voltmeter connected to ground, backprobe PCM connector terminal No. 72 (White/Blue wire). If voltage reading is 10 volts or less, go to next step. If voltage reading is more than 10 volts, system is normal. Check for poor connection at PCM or purge control valve.
Turn ignition off. Disconnect purge control solenoid and PCM connectors. Using an ohmmeter, measure resistance of harness between ground and purge control solenoid connector terminal No. 2 (White/Blue wire). If resistance is more than 10 ohms, go to next step. If resistance is 10 ohms or less, check for short in harness between PCM connector and purge control solenoid connector.
Check resistance of harness between PCM connector terminal No. 72 and purge control solenoid connector terminal No. 2 (White/Blue wire). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, check for an open in harness between PCM and purge control solenoid connector.
Remove purge control solenoid. Measure resistance of purge control solenoid between terminals No. 1 and 2. If resistance is 10-100 ohms, go to next step. If resistance is less than 10 ohms or more than 100 ohms, replace purge control solenoid.
Turn ignition on. Check voltage between purge control solenoid connector terminal No. 1 (Yellow/Red wire) and ground. If voltage is more than 10 volts, confirm there is a good connection at purge control solenoid connector. If connection is okay, replace PCM. If voltage is 10 volts or less, check for an open in harness between main relay connector and purge control solenoid connector. If okay, check for poor contact at main relay connector.