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

Turn ignition off. Disconnect ECU connector and remove protective sleeve. Connect a voltmeter between harness side of terminal No. 8 (Yellow/Brown wire on 240 and 240 DL; Yellow or Blue wire on 740 GL) 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.