Gasoline injection and ignition system (ME-SFI) - Diagnosis - Trouble-shooting · ad0761p5000b · Mercedes-Benz WIS

AD07.61-P-5000B

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

25.11.2019

Engine

113.940/942/943 up to 5/31/00, 113.961

 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-2000B
	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 MAF sensor (B2/5) Coolant temperature sensor (B11/4) Ignition voltage too low Unmetered air	3/11	AD07.61-P-6000-18A
			AD07.61-P-6000-19B

			AD07.61-P-6000-20B

			AD07.61-P-6000-21B

			AD07.61-P-6000-22B

			AD07.61-P-6000-23B

			AD07.61-P-6000-38A

			AD07.61-P-6000-39A



		2/11	AD07.61-P-6000-04B

		4/11	AD07.61-P-6000-08A

		–	AD07.61-P-6001-17B

		–	Eliminate unmetered air

Engine fails to start	Power supply 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-6000-01B
			AD07.61-P-6000-02B

			AD07.61-P-6000-03B

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





		–	AD07.61-P-7001-01C

		–	Check compression pressure or oil pressure



			AD07.61-P-6001-17B

		–

Engine has rough idling	Fuel injection valves, actuation and injection duration Unmetered air	3/11	AD07.61-P-6000-01B
			AD07.61-P-6000-02B

		–	Eliminate unmetered air

Poor engine output	Catalytic converter flow rate too low Left/right lambdasensor upstream of CAT Coolant temperature sensor (B11/4) Hot film MAF sensor (B2/5) Variable intake manifold nonfunctional Knock control at control stop	–	Check exhaust gas back pressure, see Engine DMAN Volume 1 Register A "Engine Output"


			AD07.61-P-6000-10A

			AD07.61-P-6000-11A

			AD07.61-P-6000-12A

		8/11	AD07.61-P-6000-13A

			AD07.61-P-6000-08A

			AD07.61-P-6000-04B



		4/11	AD07.61-P-6000-40A

		2/11

			Knock sensors

		–



		2/11

Engine running rough (shaking)	Fuel injection valves, actuation and injection duration Fuel injection valves leaky, spray pattern Left/right lambdasensor upstream of CAT Ignition voltage too low Compression pressure of one or more cylinders too low Unmetered air Exhaust gas recirculation valve leaky/jammed	3/11	AD07.61-P-6000-18A
			AD07.61-P-6000-19B

			AD07.61-P-6000-20B

			AD07.61-P-6000-21B

			AD07.61-P-6000-22B

			AD07.61-P-6000-23B

			AD07.61-P-6000-38A

			AD07.61-P-6000-39A



		–	AD07.61-P-7002-01A

			AD07.61-P-7002-01B

		8/11	AD07.61-P-6000-10A

			AD07.61-P-6000-11A

			AD07.61-P-6000-12A

			AD07.61-P-6000-13A

		–	AD07.61-P-6001-17B

		–	Check compression pressure

			Eliminate unmetered air

		–	Replace exhaust gas recirculation valve

		–

Engine running rough (misfire)	Ignition voltage too low Hot film MAF sensor (B2/5)	–	AD07.61-P-6001-17B
		2/11	AD07.61-P-6000-04B

Engine surges after cold start	Unmetered air	–	Eliminate unmetered air
Transition fault in warm-up	Coolant temperature sensor (B11/4) Hot film MAF sensor (B2/5) Unmetered air	4/11	AD07.61-P-6000-08A
		2/11	AD07.61-P-6000-04B

		–	Eliminate unmetered air

Transition fault when warm or poor fuel economy	Left/right lambdasensor upstream of CAT Purge control valve (Y58/1) constantly open (jammed)	8/11	AD07.61-P-6000-10A
			AD07.61-P-6000-11A

			AD07.61-P-6000-12A

			AD07.61-P-6000-13A

		4/11	AD07.61-P-6000-29A

			AD07.61-P-6000-30A

Engine jolting	Hot film MAF sensor (B2/5) Ignition voltage too low Left/right lambdasensor upstream of CAT	2/11	AD07.61-P-6000-04B
		–	AD07.61-P-6001-17B

		8/11	AD07.61-P-6000-10A

			AD07.61-P-6000-11A

			AD07.61-P-6000-12A

			AD07.61-P-6000-13A

Electronic accelerator is in limp-home function	Set value potentiometer in accelerator pedal sensor Actual value potentiometer in actuator	5/11	AD07.61-P-6002-01C
			AD07.61-P-6002-01D

		5/11	AD07.61-P-6002-03A

Referenced documents

ad0761p2000b 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.