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

AR47.70-S-1000F

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

01.07.2020

Engine

780.701 in model 447

Modification notes

30.06.2020

Work procedure updated

The whole document

AR47.70-S-1010-01F

30.06.2020

Work procedure updated

The whole document

1

High-voltage shutoff device

2

Jumper plug

3

Padlock

Power disable

1

High-voltage shutoff device

3

Padlock

4

Fuse

2

Jumper plug

Initial startup

1

High-voltage shutoff device

3

Padlock

4

Fuse

2

Jumper plug

Shown German display message

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-S-1127E

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 vehicle diagnosis system, perform quick test, and clear fault memory.



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-S-2000-04E

 Do not yet remove vehicle diagnosis system.

8

Perform power disable of the high-voltage on-board electrical system with the vehicle diagnosis 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 vehicle diagnosis system



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

Manually deenergize high-voltage on-board electrical system

AR47.70-S-1010F

9

Remove jumper plug (2), as shown in picture sequence (A, B, C), from high-voltage disconnect device (1) and secure with padlock (3) against the restart procedure.

 The key for the padlock (3) is to be kept separately and such that it is accessible only to 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 vehicle diagnosis 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.

Initial startup

15

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

16

Remove all protective covers at disconnected high-voltage plugs.

 Set of protective covers

*001589019100

17

Connect contacts of all disconnected high-voltage plugs again.

If a manual power disable was performed.

AR47.70-S-1010-01F

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 for locking element on high-voltage plug

*BA47.70-N-1014-01F

18

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



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-S-2000-04E

 The work procedure for the commissioning process is stored in all control units of the high-voltage on-board electrical system and must be processed completely.
To do so, select following menu items:
Control unit entry menu 
High voltage on-board electrical system 
Initial startup 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 vehicle diagnosis system.

19

Remove underfloor paneling at left.

If a manual power disable was performed.

AR61.30-S-1001F

20

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

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



Check

21

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

 Visual inspection only.

If damage is present,



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

AR47.70-S-1000-01F

 New passenger car wiring harness repair kit

*220589049900

 Unlocker with ejector MLK 1.2_plug

*220589019925

 Wiring harness repair kit, basic

*000589139900

22

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


Carefully slide jumper plug (2) into high-voltage disconnect device (1).
High-voltage disconnect device (1) and/or jumper plug (2) can otherwise be damaged.

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

23

Print out commissioning event log and sign.

24

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

25

Perform a quick test and erase the fault memory.



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-S-2000-04E

26

Remove vehicle diagnosis system.

27

Remove warning sign from socket flap for vehicle socket.

28

Close hood.

If no further work needs to be carried out.

29

Close window on driver's side.

If no further work needs to be carried out.

30

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

Only when vehicle leaves the workshop.

 High-voltage battery, high-voltage battery module, DC/DC converter, charger

Number

Designation

Engine 780.701 in model 447

BA47.70-N-1014-01F

Safety screw for locking element on high-voltage plug

Nm

4