Manually deenergize high-voltage on-board electrical system

AR47.70-S-1010F

Manually deenergize high-voltage on-board electrical system

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

Power disable

1

High-voltage shutoff device

3

Padlock

4

Fuse

2

Jumper plug

 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



Check

1

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

2

Print out test log (form).



Manually deenergize high-voltage on-board electrical system, form

OF47.70-S-3005-01F

 Fill out test log (form) step-by-step during the following test.

3

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

 No-one must be located in or on the vehicle throughout the entire power disable procedure.

4

Disconnect charger for retaining the 12 V on-board electrical system voltage.

If a 12 volt charger is connected.

AR54.10-S-1127E

5

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

If the charging cable is connected.

6

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

 Warning label

*451589086300

7

Open hood.

8

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

 Store key for padlock (3) separately and so that only accessible to authorized persons.
A waiting time of at least 5 minutes must be maintained before proceeding with further work.

9

Check measuring instrument (2-pin voltage tester) according to manufacturer's specifications for proper operation and damage.



000 588 07 19 00 Measuring instrument

WS47.00-N-0046A

 Proper operation of measuring instrument must be ensured before start of tests as per manufacturer's specifications.

If there is a problem,



replace measuring instrument.

10

Check test adapters for damage.

 Proper operation of    test adapters must be ensured before start of tests via a visual check for external damage.

 Test adapter

*000589946300

 Test adapter

*000589966300

 Test adapter

*222589026300

If there is a problem,



Replace damaged test adapter.

11

Wear personal protective equipment (arc-resistant jacket, face mask, electrical protective gloves, etc.).



Service Information: Personal protective equipment for working on high-voltage on-board electrical systems

SI54.10-P-0047A

 Personal protective equipment must always be worn when performing the following operation steps.
Observe safety regulations of corresponding country. These vary depending on the country concerned.

12

Remove underfloor paneling at left.

AR61.30-S-1001F

13

Carry out visual check of the high voltage components for activity and damage and perform visual check of the electrical connectors and electric lines for damage.

 No high voltage components may be active.
Electric refrigerant compressor and heaters may not be active.

If high voltage components are damaged or active,



cancel manual test of absence of voltage and inform the responsible market support.

If electric refrigerant compressor and/or a heater is active



cancel manual test of absence of voltage and inform the responsible market support.

14

Manually check high-voltage on-board electrical system for absence of voltage.

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



000 588 07 19 00 Measuring instrument

WS47.00-N-0046A

 Measure voltage measurements with the corresponding    test adapters at the high-voltage components according to the specification.

 Test adapter

*000589946300

 Test adapter

*000589966300

 Test adapter

*222589026300

If absence of voltage was not determined,



cancel manual test of absence of voltage and inform the responsible market support.

15

Cover disconnected high-voltage plugs with protective covers.

 Set of protective covers

*001589019100

16

Take off personal protective equipment (arc-resistant jacket, face mask, electrical protective gloves, etc.).

17

Complete entries in the test log (form).

 The test log must be placed behind the windshield until the restart procedure and then attached to the repair documentation after the restart procedure.