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

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Turn ignition off. Connect a voltmeter between harness side of terminal No. 8 (Yellow/Brown wire on 240; Yellow or Blue wire on 740/940) and ground. Turn ignition on. Reading should be about 0.1 volt. If reading is not 0.1 volt, check for break in wiring between electronic control units or fault in fuel system ECU.