Actron 9640A manual Quick Tests 7.3L Powerstroke Diesel Only, SelectKOEOInj.Buzz from the Quick

Ford Enhanced (OBD II) Diagnostics

Quick Tests (7.3L Powerstroke Diesel Only)

These additionalQuickTests are available when testing a truck equipped with a 7.3L Powerstroke Diesel engine.

KOEO Inj. Buzz

TheKOEOInj.Buzz is a functional test performed on demand with the ignition key ON and Engine OFF. The test determines if the injector circuits and sole- noids are operating electrically correct and without faults.

All injectors are buzzed initially (audible feedback of solenoids energizing the valves) for approximately 2 seconds. Then each injector will buzz individually for approximately 1 second, in numerical order (1 – 8).

	SelectKOEOInj.Buzz from the Quick
	Tests screen, press					.	Quick		Tess
			vehicle in a well-ventilated ar a.						Output	State ]
	Perform the following:
	1) Set Parking Brake.
	2)	Transmission In Park Or Neutral.
	3)	Turn A/C Off.
	4)	Start Engine — Let Idle Until Hot.
	5)	Turn Ign Key Off.
	6)	Wait 10 Seconds. Turn Key On-Engine Off. (Do Not S art).
	Press		to start the test. Listen for
	one long buzz and then 8 short equal							estInProgress
	lowing:ENTER
	buzzes as each fuel injector is ener-						Approximate
	1) Set Parking Brake.
	gized.
	Press the			key to return to the
6	Ford Function List or					to return
					BACK
	to the Quick Tests screen.
	KOER Glow Plug
	TheKOERGlowPlug is an on-demand test whi h act v the									w pl g r	lay
	and detects any difference in the amount of							rr nt between b th banks of glow
	plugs. DTCs returned from the test indicate whi h ba k has failed									low plugs
	or failed wiring.
			ExhaustENTERgases are harmful or FATAL. Always oper
			The KOER glow plug test`is doneOwithInjhe.engineBuzzrunning.[
			Do not over-rev engine. ObsKOEveRGlowPlugall s fety p ecautions.~
	✓ Battery Voltage must be between 11.8 and 14.0 volts for the Glow Plug
	Test. To maintain battery voltage, increase							ngine RPM. If requir		d, mon-
	itor battery voltage during the test using							vol meter.
	Select KOER Glow Plug from the						TimeLeft3:00
	Quick Tests screen. Perform the fol-
	2)	Transmission In Park Or Neutral.
	3)	Turn A/C Off.					PressBACKtoQuit~
	4)	Start EngineFUNC		— Let Idle Until Hot.
	5)	Turn Ign Key Off.									~]
	6)	Wait 10 Seconds. Start Engine — Let Idle`QuickTestsKOER. CylSwitchGlowPlug.Cont.

6 – 24 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •