Mercedes-Benz ML320. Manual — part 395

ENGINES 111.977, 112.942/970, 113.942/965/981, 612.963, 628.963 in MODEL 163

Fig. 31: Identifying Checking For Alternator Charging Current

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-5010GH

2

Connect volt ampere
tester (079) with current
clamp (065) according to

Volt ampere tester with

load resistance

*WH58.30-Z-1002-09A

Volt ampere tester ETT *WH58.30-Z-1003-09A

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me

connection diagram

011.00

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 111, 612

*BE15.40-P-1001-01A

Engines 112, 113

*BE15.40-P-1001-01K

Engine 628

*BE15.40-P-1001-01J

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

If diodes are faulty: ?



Replace alternator
(G2)

*WH58.30-Z-1046-13A

Engines 111, 112, 113

AR15.40-P-5032GH

Engine 612

AR15.40-P-5032GI

Engine 628 with water-
cooled alternator (G2)

AR15.40-P-5032IA

Engine 628 with air-cooled
alternator (G2)

AR15.40-P-5032GD

5

Turn off engine

6

Disconnect volt ampere
tester (079) with current

Volt ampere tester with

load resistance

*WH58.30-Z-1002-09A

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me

Check values for alternator

Check values for alternator

Check values for alternator

Commercially available tools

clamp (065)

Volt ampere tester ETT

011.00

*WH58.30-Z-1003-09A

Number

Designation

Engine 111 in
models 163, 203
Engine 111 in
models 202, 208
with code 910
Bosch/ Valeo

Engine 612 in
models 163,203,
209, 210, 463
Delphi

BE15.40-P-1001-
01A

Charging current
of alternator

max.

A 120

190

min.

A 90

150

Engine speed

rpm 2500

2500

Ratio

I= 2.93

2.53

Number

Designation

Engine 628.963
in model 163
NF 14V 150A

Engine 628.963
in model 163
E10 14V 90-
200A

BE15.40-P-1001-
01J

Charging current
of alternator

max.

A 150

200

min.

A 120

160

Engine speed

rpm 2500

2500

Ratio

I= 2.8

2.93

Number

Designation

Engine 112 in
models 163, 170,
202, 203, 208,
209, in model 210
without code 978,
in model 211
without code 910,
Bosch/Valeo

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 120

150

min

A 90

120

Engine speed

rpm 2500

2500

Ratio

I= 2.93

2.93

Number

Designation

WH58.30-Z-1002-09A

Volt-amp(s) tester with load resistance (no longer
available)

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me

REMOVE AND INSTALL GENERATOR - AR15.40-P-5032GH

ENGINE 111.977, 112.942/970, 113.942/965/981 in MODEL 163

Fig. 32: Identifying Generator Remove/Install Components - Shown On Engine 112

Modification notes

WH58.30-Z-1003-09A

Volt ampere tester

WH58.30-Z-1046-13A

Engine tester with oscilloscope

14.4.00

Specification revised from
15 Nm to 18 Nm

Specification in BA15.40-
P-1001-01A revised for
Series 112, 113 engines

*BA15.40-P-1001-01A

14.4.00

Value modified from 4
Nm to 5 Nm

Specification in BA15.40-
P-1002-01A revised for
112, 113 engines

*BA15.40-P-1002-01A

Removal/installation

Risk of poisoning caused by
swallowing brake fluid. Risk
of injury caused by brake
fluid coming into contact
with skin and eyes.

Fire, sparks, naked flames and
smoking prohibited. Wear acid-
resistant gloves, clothing and
safety glasses. Pour battery acid
only into suitable and
appropriately marked containers.

AS54.10-Z-0001-01A

Risk of injury to fingers

When moving components,

AS00.00-Z-0011-01A

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me