DTC P1122 (BR_Hi): Pressure Sources Switching Solenoid Valve Circuit High Input
- Turn ignition on. Using voltmeter connected to ground, backprobe PCM connector terminal No. 15 (Green/Yellow wire on Forester, Yellow/Green wire on Impreza, or Yellow/White wire on Legacy). If voltage reading is 10 volts or less, check for poor contact at PCM connector. If connection is okay, replace PCM. If voltage reading is more than 10 volts, leave voltmeter connected and go to next step.
- Turn ignition off. Disconnect pressure sources switching solenoid valve connector. Turn ignition on. If voltage is more than 10 volts, repair short in harness, then replace PCM. If voltage is 10 volts or less, go to next step.
- Turn ignition off. Check resistance of pressure sources switching solenoid valve between terminals No. 1 and 2. If resistance is one ohm or less, replace pressure sources switching solenoid valve and PCM. If resistance is more than one ohm, check PCM connection. If connection is okay, replace PCM.