Gasoline injection and ignition system (ME-SFI) - Diagnosis - Trouble-shooting · ad0761p5000f · Mercedes-Benz WIS

AD07.61-P-5000F

Gasoline injection and ignition system (ME-SFI) - Diagnosis - Trouble-shooting

25.11.2019

Engine

120

 Danger	Risk of death. Death may occur if body parts are drawn into rotating vehicle parts.	Do not insert your hand into rotating parts. Wear closed and snug-fitting work clothes. Secure area of rotating vehicle components against unauthorized access.	AS00.00-Z-0004-01A
 Danger	Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.	AS00.00-Z-0035-01A
 Danger	Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.	No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
Topical note	Notes on avoiding damage to ignition system		AH15.10-P-0002-01D
	Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge		AD07.61-P-2000F
	Troubleshooting
Complaint	Possible cause	Notes	Remedy
		Check actual engine values, menu item	Remedy/test step
Engine starts poorly when cold and throttle response is poor	Fuel injection valves, actuation and injection duration Hot film mass air flow sensor (B2/6) or (B2/7) Coolant temperature sensor (B11/9) or (B11/10) Ignition voltage too low Unmetered air	2/7	AD07.61-P-6000-72A
			AD07.61-P-6000-73A

			AD07.61-P-6000-59A

			AD07.61-P-6000-60A

			AD07.61-P-6000-61A

			AD07.61-P-6000-62A

		1/7	AD07.61-P-6000-04E



		3/7	AD07.61-P-6000-08B



		–	AD07.61-P-6001-17E

		–	Eliminate unmetered air

Engine fails to start	Power supply from base module missing Malfunction in drive authorization system (FBS) Fuel pump (FP) No compression pressure, as oil pressure too high Ignition voltage too low	–	AD07.61-P-6000-01E
			AD07.61-P-6000-70A

			AD07.61-P-6000-71A

		Drive authorization 1/1	AD07.61-P-6000-34D



		–	AD07.61-P-7001-03C

		–	Check compression pressure and oil pressure

			AD07.61-P-6001-17E

		–

Engine has rough idling	Camshaft timing Fuel injection valves, actuation and injection duration Unmetered air	2/7	AD07.61-P-6000-46B
			AD07.61-P-6000-47B

		2/7	AD07.61-P-6000-72A

			AD07.61-P-6000-73A

			AD07.61-P-6000-59A

			AD07.61-P-6000-60A

			AD07.61-P-6000-61A

			AD07.61-P-6000-62A

		–	Eliminate unmetered air

Poor engine output	Catalytic converter flow rate too low Left or right lambdasensor upstream of CAT Coolant temperature sensor (B11/9) or (B11/10) Hot film mass air flow sensor (B2/6) or (B2/7) Camshaft timing	–	Check exhaust gas back pressure, see Engine DMAN, Reg. A "Engine Output"
			AD07.61-P-6000-42B

			AD07.61-P-6000-43B

		5/7	AD07.61-P-6000-08B



		3/7	AD07.61-P-6000-04E



		1/7	AD07.61-P-6000-46B

			AD07.61-P-6000-47B

		2/7



Engine running rough (shaking)	Fuel injection valves, actuation and injection duration Fuel injection valves leaky, spray pattern Left or right lambdasensor upstream of CAT Ignition voltage too low Compression pressure of one or more cylinders too low Unmetered air	2/7	AD07.61-P-6000-72A
			AD07.61-P-6000-73A

			AD07.61-P-6000-59A

			AD07.61-P-6000-60A

			AD07.61-P-6000-61A

			AD07.61-P-6000-62A

		–	AD07.61-P-7002-02B



		5/7	AD07.61-P-6000-42B

			AD07.61-P-6000-43B

		–	AD07.61-P-6001-17E

		–	Check compression pressure

			Eliminate unmetered air

		–

Engine running rough (misfire)	Ignition voltage too low Hot film mass air flow sensor (B2/6) or (B2/7)	–	AD07.61-P-6001-17E
		1/7	AD07.61-P-6000-04E



Engine surges after cold start	Unmetered air	–	Eliminate unmetered air
Transition fault in warm-up	Coolant temperature sensor (B11/9) or (B11/10) Hot film mass air flow sensor (B2/6) or (B2/7) Unmetered air	3/7	AD07.61-P-6000-08B


		1/7	AD07.61-P-6000-04E



		–	Eliminate unmetered air

Transition fault when warm or poor fuel economy	Left or right lambdasensor upstream of CAT Left (Y58/2) or right (Y58/3) purge control valve constantly open (jammed)	5/7	AD07.61-P-6000-42B
			AD07.61-P-6000-43B

		3/7	AD07.61-P-6000-29D

			AD07.61-P-6000-30D



Engine jolting	Hot film mass air flow sensor (B2/6) or (B2/7) Ignition voltage too low Left or right lambdasensor upstream of CAT	1/7	AD07.61-P-6000-04E


		–	AD07.61-P-6001-17E

		5/7	AD07.61-P-6000-42B

			AD07.61-P-6000-43B

EPC indicator lamp (up to 05/96) lights up and electronic accelerator is in limp-home function	Set value potentiometer in accelerator pedal sensor Actual value potentiometer in actuator	4/7	AD07.61-P-6002-08B
			AD07.61-P-6002-09B

		4/7	AD07.61-P-6002-03C

			AD07.61-P-6002-04B

Referenced documents

ad0761p2000f Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge
ah1510p000201d Notes on avoiding damage to ignition system
as0000z000401a Risk of death. Death may occur if body parts are drawn into rotating vehicle parts.
as0000z003501a Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)
as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.