Checking charging current of alternator - AR15.40-P-5011F

ENGINES 104.945 /995,111.942 /970,112.911 /921 /941,113.940,119.985, 602.982, 604.912/917, 605.912/962, 606.912 /962, 611.961, 612.961, 613.961 in MODEL 210

Connection diagram

Fig 1: Checking Charging Current Of Alternator

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Modification notes

18.10.05

Charging current of alternator

Engine 111

*BE15.40-P-1001-01A

	Checking
	Risk of explosion caused by oxyhydrogen gas. Risk of poisoning and caustic burns caused by swallowing battery acid. Risk of injury caused by burns to skin and eyes from battery acid or when handling damaged lead acid batteries	No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and goggles. Only pour battery acid into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
	Notes on battery		AH54.10-P-0001-01A
1	Check regulation voltage of alternator		AR15.40-P-5010F
2	Connect volt ampere tester (079) with current clamp (065) according to connection diagram	Volt ampere tester with load resistance	*WH58.30-Z-1002-09A
		Volt ampere tester ETT 011.00	*WH58.30-Z-1003-09A
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the running engine	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
3	Start engine
4	Load battery (G1) with volt ampere tester (079) and check charging current of alternator (G2) with increased engine speed	Vary load resistance long enough until the maximum load current is achieved; when this is done, the regulating voltage must not drop below 12.7 V.
		Engines 104, 111, 119, 602, 604, 605, 606, 611, 612, 613	*BE15.40-P-1001-01A
		Engines 112, 113	*BE15.40-P-1001-01K
		Volt ampere tester with load resistance	*WH58.30-Z-1002-09A
		Volt ampere tester ETT 011.00	*WH58.30-Z-1003-09A
		Charging current below desired value: ↓
		Check diodes for alternator (G2).	AR15.40-P-9301-02EA
		Engine tester with oscilloscope	*WH58.30-Z-1046-13A
		If diodes are faulty: ↓ Replace alternator (G2)
		Engines 104, 111, 602, 604, 605, 606, 611 up to 31.5.99	AR15.40-P-5032F
		Engines 112, 113, 119	AR15.40-P-5032ED
		Engine 611 as of 1.6.99, 612, 613	AR15.40-P-5032EC
5	Turn off engine
6	Connect volt ampere tester (079) with DC clip-on probe (065)	Volt ampere tester with load resistance	*WH58.30-Z-1002-09A
		Volt ampere tester ETT 011.00	*WH58.30-Z-1003-09A

Check values for alternator

Number	Designation			Engines 104.941/995 KC 14 V 45/90 A	Engine 104.941 NC 14 V 60/120 A	Engine 104.941/995 NC 14 V 70/115 A	Engine 104.941/NC 14 V 75/115 A	Engine 111 in models 170, 202, 208, 210 Bosch
BE15.40-P-1001-01A	Charging current of alternator	max.	A	90	120	115	115	90
		min.	A	70	90	90	90	70
		Engine speed	rpm	2200	2200	2300	2500	2500
		Ratio	I=	2.93	2.93	2.82	2.9	2.93

Check values for alternator

Number	Designation			Engine 119.985 NC 14 V 70/115 A	Engine 602 in models 210 Valeo	Engine 602 in models 210 Bosch	Engine 602 in models 210 with code 450 or 910 Valeo	Engine 602 in models 210 with code 450 or 910 Bosch
BE15.40-P-1001-01A	Charging current of alternator	max.	A	115	90	90	120	115
		min.	A	90	70	70	90	90
		Engine speed	rpm	2100	2500	2500	2500	2000
		Ratio	I=	3.1	2.53	2.93	2.93	2.93

Check values for alternator

Number	Designation			Engine 604 in models 210 with code 450 or 910 Valeo	Engine 604 in models 210 without code 450 or 910 Valeo	Engine 604 in models 210 with code 450 or 910 Valeo	Engine 604 in models 210 with code 450 or 910 Bosch	Engine 605 in models 210 with code 210 or 910 Valeo
BE15.40-P-1001-01A	Charging current max. of alternator	max.	A	90	90	120	115	90
		min.	A	70	70	90	90	70
		Engine speed	rpm	2500	2500	2500	2000	2500
		Ratio	I=	2.53	2.93	2.93	2.93	2.53

Check values for alternator

Number	Designation			Engine 605 in models 210 without code 210 or 910 Valeo	Engine 605 in models 210 with code 210 or 910 Valeo	Engine 605 in models 210 with code 210 or 910 Bosch	Engine 606 in model 210 Valeo	Engine 606 in model 210 Bosch
BE15.40-P-1001-01A	Charging current of alternator	max.	A	90	120	115	120	115
		min.	A	70	90	90	90	90
		Engine speed	rpm	2500	2500	2000	2500	2000
		Ratio	I=	2.93	2.93	2.93	2.93	2.93

Check values for alternator

Number	Designation			Engine 611 in models 203,210 Delphi	Engine 612 in models 163,203, 209,210, 463 Delphi	Engine 613 in models 210,220 Delphi
BE15.40-P-1001-01A	Charging current of alternator	max.	A	190	190	190
		min.	A	150	150	150
		Engine speed	rpm	2500	2500	2500
		Ratio	I=	2.53	2.53	2.53

Check values for alternator

Number	Designation			Engine 112 in model 220, 230, in model 210 with code 978, in model 211 with code 910, Bosch	Engine 112 in models 163,170,202,203, 208, 209, in model 210 without code 978, in model 211 without code 910, Bosch/Valeo
BE15.40-P-1001-01K	Charging current of alternator	max.	A	150	120
		min	A	120	90
		Engine speed	rpm	2500	2500
		Ratio	I=	2.93	2.93

Check values for alternator

Number	Designation			Engine 113 in models 163,171,203,208, 209,210,211,215, 219,220,230 except models 211.076/276, 215.374, 219.376, 220.074/174, 230.472/474 Bosch
BE15.40-P-1001-01K	Charging current of alternator	max.	A	150
		min	A	120
		Engine speed	rpm	2500
		Ratio	I=	2.93

Commercially available tools

Number	Designation
WH58.30-Z-1002-09A	Volt-amp(s) tester with load resistance (no longer available)
WH58.30-Z-1003-09A	Volt ampere tester
WH58.30-Z-1046-13A	Engine tester with oscilloscope