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

AR47.70-P-1000EQ

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

03.12.2019

Model

293

2

Jumper plug

S7

High-voltage disconnect device

 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 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

Notes on safety-relevant components

AH00.00-Z-0019-01A

Power disable

1

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

If the charging cable is connected.

2

Open hood.

3

Remove upper engine cover.



AP01.10-P-2405-01J

4

Connect diagnostic system.



AD00.00-P-2000-06FR

5

Disable the high-voltage on-board electrical system.



AD00.00-P-2000-06FR

 The disabling work procedure described in the diagnostic system must be processed completely.
To do so, select following menu items:
Control unit entry menu 
Drive type 
Power electronics control unit for electric machine 1 (N129/1) or power electronics control unit for electric machine 2 (N129/2) 
High-voltage on-board electrical system tab 
High-voltage on-board electrical system power disable event log

 Warning label

*451589086300

If the power cannot be disabled with the diagnostic system,



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

AR47.70-P-1010EQ

6

Print out power disable event log and sign.

7

Print out the "Shifting prohibited" sign and hang together with the power disable event log on the inside rear-view mirror in the vehicle.

Commissioning

8

Attach high-voltage plugs to the high-voltage battery and high-voltage power distributor.

If the high-voltage on-board electrical system has been manually disabled.

AR47.70-P-0005-01EQ

  Screw, high-voltage plug to high-voltage distributor

*BA47.70-P-1001-03A

9

Check jumper plug (2) and bushing of the high-voltage disconnect device (S7) for damage.

If there is a problem,



replace bushing of the high-voltage disconnect device (S7) with the contact sockets and jumper plug (2).

AR47.70-P-1000-01EQ

 New passenger car wiring harness repair kit

*220589049900

 Unlocker with ejector MLK 1.2_plug

*220589019925

 Wiring harness repair kit, basic

*000589139900

10

Commission high-voltage on-board electrical system.



AD00.00-P-2000-06FR

 The disabling work procedure described in the diagnostic system must be processed completely.
To do so, select following menu items:
Control unit entry menu 
Drive type 
Power electronics control unit for electric machine 1 (N129/1) or power electronics control unit for electric machine 2 (N129/2) 
High-voltage on-board electrical system tab 
High-voltage on-board electrical system commissioning event log 

11

Remove "Do not alter state of the switch" sign from vehicle.

12

Print out commissioning event log and sign.

13

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

14

Perform quick test, clear fault memory, and disconnect diagnostic system.



AD00.00-P-2000-06FR

15

Install top engine cover.



AP01.10-P-2405-01J

16

Close hood.

If no further work needs to be carried out.

 High-voltage power distributor

Number

Designation

Model 293

BA47.70-P-1001-03A

 Screw, high-voltage plug to high-voltage distributor

Nm

4