Deenergize high-voltage on-board electrical system/put high-voltage on-board electrical system into operation

AR47.70-D-1000TE

Deenergize high-voltage on-board electrical system/put high-voltage on-board electrical system into operation

01.07.2020

Engine

780.703 in model 910

Modification notes

30.06.2020

Work procedure updated

The whole document

AR47.70-D-1010-01TE

1

High-voltage disconnect device

2

Jumper plug

3

Padlock

Power disable

1

High-voltage disconnect device

3

Padlock

4

Retainer

2

Jumper plug

Commissioning

1

High-voltage disconnect device

3

Padlock

4

Retainer

2

Jumper plug

German display message shown

5

Instrument cluster

5.1

Multifunction display

 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

 Warning

Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.

No parts of the body or limbs should be within the operating area when the components are moving.

AS00.00-Z-0011-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

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

Power disable

1

Attach magnetic "Caution! High voltage" signs on both sides of the vehicle.

2

Remove charger for charging 12 V on-board electrical system battery.

If a 12 volt charger is connected.

AR54.10-D-1127TS

3

Unplug charging cable from vehicle socket for charging the high-voltage battery.

If the charging cable is connected.

4

Close socket flap for vehicle socket and secure with warning sign against reinsertion of charging cable.

 Warning label

*451589086300

5

Open hood.

6

Open window on driver's side.

7

Connect diagnostic system, perform quick test and clear fault memory.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

 Do not yet remove diagnostic system.

8

Perform power disable of the high-voltage on-board electrical system with the diagnostic system.

 Work procedure for power disable process is stored in all control units of high-voltage on-board electrical system and must be fully processed.
To do so, select following menu items:
Control unit entry menu 
High-voltage on-board electrical system 
Power disable of high-voltage on-board electrical system

If power disable cannot be performed with diagnostic system



Perform manual power disabling for high-voltage on-board electrical system.

Manually deenergize high-voltage on-board electrical system

AR47.70-D-1010TE

9

Release jumper plug (2) as shown in picture sequence (A, B, C) on retainer (4), pull out from high-voltage disconnect device (1), and secure with padlock (3) against restart procedure.

 Key for padlock (3) must be stored separately and so that it is accessible only for authorized persons.
A waiting time of at least 30 seconds should be observed before proceeding with further work.

10

Switch on ignition.

11

Check for absence of voltage of high-voltage on-board electrical system in instrument cluster (5).


Displays in multifunction display (5.1) must be:
"Spannungsfrei: ja" (De-energized: yes)
U: A value < 60V or "---" 
I: Value 0 or "---".
Otherwise, the high-voltage on-board electrical system is not de-energized.

 Work procedure for absence of voltage is stored in workshop menu of instrument cluster and described in the diagnostic system.
Different illustrations are shown here depending on the version.

12

Print out power disable event log, sign, and place in vehicle in a clearly visible position.

13

Switch off ignition.

14

Fill out "Shifting prohibited" sign and hang on inside rearview mirror in vehicle.

Commissioning

15

Remove "Shifting prohibited" sign from inside rearview mirror of vehicle.

16

Remove all protective covers on disconnected high-voltage plugs.

 Set of protective covers

*001589019100

17

Reconnect contacts of all disconnected high-voltage plugs.

If a manual power disable was performed.

AR47.70-D-1010-01TE

Clip: Remove/install high-voltage power distributor in engine compartment

GB47.70-S-0000-00A

Clip: Detach/attach high-voltage plug

GB47.70-S-0000-01A

 Safety screw, locking element to high-voltage battery high-voltage plug

*BA47.70-N-1001-01TE

18

Perform commissioning of high-voltage on-board electrical system with diagnostic system.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

 Work procedure for commissioning is stored in all control units of high-voltage on-board electrical system and must be fully processed.
To do so, select following menu items:
Control unit entry menu 
High-voltage on-board electrical system 
Commissioning of high-voltage on-board electrical system

 Document, print out and sign the proper fixation of all high-voltage direct threaded connections in the work procedure of the high-voltage on-board electrical system commissioning.

 Do not yet remove diagnostic system.

19

Install left underfloor paneling on high-voltage battery module.

If a manual power disable was performed.

AR61.30-D-1002TE

20

Install underfloor paneling.

If a manual power disable was performed.

AR61.30-D-1001TS

21

Remove padlock (3) on jumper plug (2) of high-voltage disconnect device (1).

 Key for padlock (3) must be stored separately and so that it is accessible only to authorized persons.



Check

22

Check jumper plug (2) and socket of high-voltage disconnect device (1) for damage.

 Visual check only.

If damage is present,



Replace socket of high-voltage disconnect device (1) with contact sockets and jumper plug (2).

AR47.70-S-1000-01F

 Wiring harness repair kit, basic

*000589139900

 New passenger car wiring harness repair kit

*220589049900

 Unlocker with ejector MLK 1.2_plug

*220589019925

23

Insert jumper plug (2) as shown in picture sequence (D, E, F) into high-voltage disconnect device (1) and lock retainer (4).


Insert jumper plug (2) into high-voltage disconnect device (1) carefully.
The high-voltage disconnect device (1) or jumper plug (2) may be damaged otherwise.

 A waiting time of at least 30 seconds should be observed before proceeding with further work.

24

Print out commissioning event log and sign.

25

Place commissioning event log and power disable event log in order folder.

26

Perform a quick test and erase the fault memory.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

27

Remove diagnostic system.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

28

Remove warning sign on socket flap for vehicle socket.

29

Close hood.

If no further work needs to be carried out.

30

Close window on driver's side.

If no further work needs to be carried out.

31

Remove magnetic "Caution! High voltage" signs on both sides of the vehicle.

Do not do so until the vehicle leaves the workshop.

 High-voltage battery

Number

Designation

Engine 780.703 in model 910

BA47.70-N-1001-01TE

Safety screw, locking element to high-voltage battery high-voltage plug

Nm

4