Check ground lines for high-voltage on-board electrical system potential equalization · ar4770d102001te · Mercedes-Benz WIS

AR47.70-D-1020-01TE	Check ground lines for high-voltage on-board electrical system potential equalization
 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
Topical note	General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system		AH00.00-Z-0300-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Notes on battery		AH54.10-P-0001-01A

Engine

780.703 in model 910

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1001-02TE	Screw, potential equalization ground line to high-voltage power distributor in engine compartment	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1002-02TE	Screw, potential equalization ground line to high-voltage power distributor on underbody	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1003-02TE	Screw, potential equalization ground line to axle drive module	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1004-02TE	Nut, potential equalization ground line to high-voltage battery module	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1005-02TE	Screw, potential equalization ground line to high-voltage battery	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1006-02TE	Nut, potential equalization ground line to body	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1007-02TE	Screw, potential equalization ground line to DC/DC converter	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1008-02TE	Nut, potential equalization ground line to high-voltage components holder in engine compartment	Nm	16

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1009-02TE	Screw, potential equalization ground line/protective ground conductor to DC current charge-connection unit	Nm	7

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1010-02TE	Bolt, ground line for potential equalization to AC charger	Nm	7

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1011-02TE	Nut, potential equalization ground line to auxiliary circuit heater holder	Nm	7

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1012-02TE	Nut, potential equalization ground line to auxiliary circuit heater	Nm	7

 High-voltage on-board electrical system potential equalization ground lines

Number	Designation		Engine 780.703 in model 910
BA47.70-N-1013-02TE	Nut, potential equalization ground line to vehicle interior heater	Nm	7

 When performing work on the high voltage components, the electrical lines for the potential equalization must be checked.
Depending on the test area, suitable underfloor paneling, engine compartment paneling at the bottom or the guard plate must have been removed.

Check ground lines for high-voltage on-board electrical system potential
equalization

D47.70-A017-79

Check the potential equalization for 1st, 2nd and 3rd high-voltage battery and for the high-voltage battery module.

1	Check the potential equalization ground line (1) for damage.

If damage is present,



replace the damaged potential equalization ground line (1).   .

2	Check that the potential equalization ground line (1) is seated tightly.

If one or more potential equalization ground line(s) (1) is/are loose,



secure the potential equalization ground line (1)   .

3	Check the potential equalization ground line (2) for damage.

If damage is present,



replace the damaged potential equalization ground line (2)   .

4	Check that the potential equalization ground line (2) is seated tightly.

If the potential equalization ground line (2) is loose:



secure the potential equalization ground line (2)   .

D47.70-A018-79

Check the potential equalization for 4st high-voltage battery and for the high-voltage battery module.

5	Engine 780.703 in model 910 with code E4T (High-voltage battery (47 kWh)) Check the potential equalization ground line (3) for damage.

If damage is present,



replace the damaged potential equalization ground line (3)   .

6	Engine 780.703 in model 910 with code E4T (High-voltage battery (47 kWh)) Check that the potential equalization ground line (3) is seated tightly.

If the potential equalization ground line (3) is loose:



secure the potential equalization ground line (3)   .

7	Engine 780.703 in model 910 with code E4T (High-voltage battery (47 kWh)) Check the potential equalization ground line (4) for damage.

If damage is present,



replace the damaged potential equalization ground line (4)   .

8	Engine 780.703 in model 910 with code E4T (High-voltage battery (47 kWh)) Check that the potential equalization ground line (4) is seated tightly.

If the potential equalization ground line (4) is loose:



secure the potential equalization ground line (4)   .

D47.70-A019-79

Check the potential equalization for ancillary circuit heater and for the high-voltage power distributor on the undercarriage

9	Check the potential equalization ground line (5) for damage.

If damage is present,



Replace potential equalization ground line (5)   .

10	Check that the potential equalization ground line (5) is seated tightly.

If the potential equalization ground line (5) is loose:



secure the potential equalization ground line (5)   .

11	Check the potential equalization ground line (6) for damage.

If damage is present,



Replace potential equalization ground line (6)   .

12	Check that the potential equalization ground line (6) is seated tightly.

If the potential equalization ground line (6) is loose:



secure the potential equalization ground line (6)   .

Check potential equalization for the DC current charge-connection unit

13	Check the potential equalization ground line (7) for damage.

	If damage is present,
	
	Replace potential equalization ground line (7)   .

14	Check that the potential equalization ground line (7) is seated tightly.

	If the potential equalization ground line (7) is loose:
	
	secure the potential equalization ground line (7)   .

D47.70-A022-76

Check the protective earth conductor of the feed-in socket

15	Check electrical line (8) for damage.

	If damage is present,
	
	replace the electrical line (8)  .

16	Check the electrical line (8) is firmly seated.

	If the electrical line (8) is loose,
	
	Fasten the electrical line (8)  .

D47.70-A023-76

Check potential equalization for AC charger

17	Check the potential equalization ground line (9) for damage.

	If damage is present,
	
	Replace potential equalization ground line (9)   .

18	Check that the potential equalization ground line (9) is seated tightly.

	If the potential equalization ground line (9) is loose:
	
	secure the potential equalization ground line (9)   .

D47.70-A024-76

D47.70-A020-79

Check the potential equalization for the DC/DC converter

19	Check the potential equalization ground line (10) for damage.

If damage is present,



Replace potential equalization ground line (10)   .

20	Check that the potential equalization ground line (10) is seated tightly.

If the potential equalization ground line (10) is loose:



secure the potential equalization ground line (10)   .

Check potential equalization for vehicle interior heater

21	Check the potential equalization ground line (11) for damage.

	If damage is present,
	
	Replace potential equalization ground line (11)   .

22	Check that the potential equalization ground line (11) is seated tightly.

	If the potential equalization ground line (11) is loose:
	
	secure the potential equalization ground line (11)   .

D47.70-A025-76

Check potential equalization for high-voltage power distributor in engine compartment

23	Check the potential equalization ground line (12) for damage.

	If damage is present,
	
	Replace potential equalization ground line (12)   .

24	Check that the potential equalization ground line (12) is seated tightly.

	If the potential equalization ground line (12) is loose:
	
	secure the potential equalization ground line (12)   .

D47.70-A026-76

Check potential equalization for axle drive module

25	Check the potential equalization ground line (13) for damage.

	If damage is present,
	
	Replace potential equalization ground line (13)   .

26	Check that the potential equalization ground line (13) is seated tightly.

	If the potential equalization ground line (13) is loose:
	
	secure the potential equalization ground line (13)   .

D47.70-A027-76

D47.70-A021-78

Check potential equalization for the tubular frame

27	Check the potential equalization ground line (14) for damage.

If damage is present,



Replace potential equalization ground line (14)   .

28	Check that the potential equalization ground line (14) is seated tightly.

If the potential equalization ground line (14) is loose:



secure the potential equalization ground line (14)   .

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