Gasoline injection and ignition system (ME-SFI) - Diagnosis - Trouble-shooting · ad0761p5000c · Mercedes-Benz WIS

AD07.61-P-5000C

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

25.11.2019

Engine	104.941/943/944/991/994 as of 8/1/96
Engine	104.995
	as of model year 1997
	with code 494 (US version)
	with code 498 (Japanese version)
	with code 807 (Model year 1997)
	with code 808 (Model year 1998)

 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
	Connecting hand-held tester (HHT), reading fault memory		AD00.00-P-2000-03A
	Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge		AD07.61-P-2000C
	Troubleshooting
Complaint	Possible cause	Notes	Remedy
		Check engine actual values, menu item	Remedy/test step
Engine slow to start and accelerate	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-6000-18B
			AD07.61-P-6000-19C

			AD07.61-P-6000-20C

			AD07.61-P-6000-21C

			AD07.61-P-6000-22C

			AD07.61-P-6000-23C

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

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

		-	AD07.61-P-6001-17C

		-	Eliminate unmetered air

Engine fails to start	Power supply missing Malfunction in drive authorization system (DAS) Fuel pump (FP) No compression pressure as oil pressure too high Ignition voltage too low	-	AD07.61-P-6000-01C
			AD07.61-P-6000-02C

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



		-	AD07.61-P-7001-03A

		-	Check compression pressure/ oil pressure

			AD07.61-P-6001-17C

		-

Engine has rough idling	Camshaft timing Injection valves actuation and injection duration Unmetered air	3/11	AD07.61-P-6000-46A
			AD07.61-P-6000-47A

		3/11	AD07.61-P-6000-18B

			AD07.61-P-6000-19C

			AD07.61-P-6000-20C

			AD07.61-P-6000-21C

			AD07.61-P-6000-22C

			AD07.61-P-6000-23C

		-	Eliminate unmetered air

Poor engine output	Catalytic converter has too low flow rate Lambda sensor upstream of catalytic converter Coolant temperature sensor (B11/4) Hot film MAF sensor (B2/5) Camshaft timing	-	Check exhaust gas back pressure, see DMAN Engine, Index A "Engine output"
			AD07.61-P-6000-42A

			AD07.61-P-6000-43A

		8/11	AD07.61-P-6000-08A

			AD07.61-P-6000-04C

		4/11	AD07.61-P-6000-46A

		2/11	AD07.61-P-6000-47A

		3/11

Engine runs irregularly (shakes)	Injection valves actuation and injection duration Injection valves leaky, spray pattern Lambda sensor upstream of catalytic converter (G3/2) Ignition voltage too low Compression pressure of one or more cylinders too low Unmetered air Exhaust gas recirculation valve leaky/jams	3/11	AD07.61-P-6000-18B
			AD07.61-P-6000-19C

			AD07.61-P-6000-20C

			AD07.61-P-6000-21C

			AD07.61-P-6000-22C

			AD07.61-P-6000-23C

		-	AD07.61-P-7002-02A



		8/11	AD07.61-P-6000-42A

			AD07.61-P-6000-43A

		-	AD07.61-P-6001-17C

		-	Check compression pressure

			Eliminate unmetered air

		-	Check exhaust gas recirculation valve

		-

Engine runs irregularly (misfire)	Ignition voltage too low Hot film MAF sensor (B2/5)	-	AD07.61-P-6001-17C
		2/11	AD07.61-P-6000-04C

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-6000-04C

		-	Eliminate unmetered air

Transition fault in warm-up/poor fuel economy	Lambda sensor upstream of catalytic converter (G3/2) Purge control valve (Y58/1) constantly open (jams)	8/11	AD07.61-P-6000-42A
			AD07.61-P-6000-43A

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

			AD07.61-P-6000-30B

Engine jerks	Hot film MAF sensor (B2/5) Ignition voltage too low Lambda sensor upstream of catalytic converter (G3/2)	2/11	AD07.61-P-6000-04C
		-	AD07.61-P-6001-17C

		8/11	AD07.61-P-6000-42A

			AD07.61-P-6000-43A

Electronic accelerator is in limp-home function	Set value potentiometer in pedal value sensor Actual value potentiometer in actuator	5/11	AD07.61-P-6002-08A
			AD07.61-P-6002-09A

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

Referenced documents

ad0000p200003a Connecting Hand-Held Tester (HHT), reading out fault memory
ad0761p2000c Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge
ad0761p2000c
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.