Code 1-4-4 (Fuel System Ecu Load Signal)

Turn ignition off. Disconnect ECU connector and remove protective sleeve. Connect an voltmeter between harness side of terminal No. 8 (Yellow/Brown wire on 240 series and Yellow wire on 740 GL) and ground. Turn ignition on. Reading should be approximately 0.1 volt. If reading is not 0.1 volt, check for break in wiring between ECUs or fault in fuel system ECU.