Code 2-2-3 (Idle Valve Signal)

Turn ignition off. Disconnect fuel system ECU connector and remove protective sleeve. Connect an ohmmeter between harness side of terminal No. 33 (Green/Red wire on 240; Red/Black wire on 740/940) and terminal No. 9 (Orange wire on 240; Blue/Yellow wire on 740/940). Reading should be approximately 8 ohms. If reading is not 8 ohms, check wiring and connectors. If wiring and connectors are okay, test idle valve. For idle valve testing, see SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE Section.