Check regulation voltage of alternator

AR15.40-D-5010SD

Check regulation voltage of alternator

14.2.12



Check

 Danger!

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 engine as it is running

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 Danger!

Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices

No fire, sparks, open flames or smoking.

Wear acid-resistant gloves and clothing and safety glasses with side guards.

Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.

Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.

AS54.10-Z-0001-01A



Notes on battery

AH54.10-P-0001-01A

1

Check battery (G1)

AR54.10-N-1129-01A

CCA according to DIN/EN

Battery capacity 74 Ah

*BE54.10-N-1007-01A

Battery capacity 88 Ah

*BE54.10-N-1009-01A

Battery capacity 95 Ah non-woven cloth

*BE54.10-N-1011-01A

Battery capacity 100 Ah

*BE54.10-N-1012-01A

2

Check that electrical connections for terminal 30 at the fuse box, starter, alternator and battery (G1) are secure and in a proper state

3

Check that battery ground line (G1) and ground connections between the engine, transmission and body are secure and in a proper state

4

Check electrical connection for terminal 30 and ground line for additional battery for tight seating and a perfect condition

For vehicles with code (E28) additional 12 V 88 Ah battery

5

Check condition of poly-V belt

AR13.22-S-1351S

6

Start engine

7

Inspect charge indicator in instrument cluster

 In case of correct charging voltage, no fault message is shown in the display of the instrument clusters.

8

Turn off engine

9

Connect up multimeter (1) according to connection diagram

Digital multimeter

gotis://E_15/54_06.0

10

Start engine

11

Check charge indicator with engine idling and when engine speed increased (up to 3000 rpm)

 In case of correct charging voltage, no fault message is shown in the display of the instrument clusters.

12

Check regulation voltage using a multimeter (1)

 Only apply load to battery (G1) for the vehicle's own consumer (e.g. lighting).

If the regulation voltage is below 13.0 V, then all transition resistances must be eliminated at the electrical connections of the charging system.

If the regulation voltage is above 14.5 V, or is still below 13.0 V following elimination of all transition resistances, then the alternator must be replaced.

Refer to:

Battery capacity 74 Ah

*BE54.10-N-1007-01A

Battery capacity 88 Ah

*BE54.10-N-1009-01A

Battery capacity 95 Ah non-woven cloth

*BE54.10-N-1011-01A

Battery capacity 100 Ah

*BE54.10-N-1012-01A



Remove/install alternator

AR15.40-D-5032SD

Digital multimeter

gotis://E_15/54_06.0

13

Turn off engine

14

Disconnect digital multimeter (1)

Digital multimeter

gotis://E_15/54_06.0

Number

Designation

Model
906
with engine
646
90 A

Model
906
with engine
646
180 A

Model
906
with engine
646,
220

Model
906
with engine
646 with code MS3
200 A

BE15.40-N-1002-01B

Regulating voltage
(at battery)

Load: Only primary consumers on

V

13.0 to 14.5

13.0 to 14.5

13.0 to 14.5

13.0 to 14.5

Engine speed

rpm

3000

3000

3000

3000

measured as per

min

2

2

2

2

Number

Designation

All models

BE54.10-N-1007-01A

Battery capacity 74 Ah

Battery test at 20 °C

Acid density (battery charged)

kg/dm3

1.28

Acid density during status test

kg/dm3

1.24

Permissible deviation of individual cells

kg/dm3

0.04

Cold test current

as per DIN

A

400

as per EN

A

680

BE54.10-N-1009-01A

Battery capacity 88 Ah

Battery test at 20 °C

Acid density (battery charged)

kg/dm3

1.28

Acid density during status test

kg/dm3

1.24

Permissible deviation of individual cells

kg/dm3

0.04

Cold test current

as per DIN

A

400

as per EN

A

680

BE54.10-N-1011-01A

Battery capacity 95 Ah non-woven cloth

Cold test current

as per DIN

A

520

as per EN

A

850

BE54.10-N-1012-01A

Battery capacity 100 Ah

Battery test at 20 °C

Acid density (battery charged)

kg/dm3

1.28

Acid density during status test

kg/dm3

1.24

Permissible deviation of individual cells

kg/dm3

0.04

Cold test current

as per DIN

A

450

as per EN

A

760