Perform protective ground conductor and insulation resistance measurement

AR47.70-D-1031TE

Perform protective ground conductor and insulation resistance measurement

13.01.2020

Engine

780.703 in model 910

 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

Preparatory tasks

1

Process safety-related fault codes using vehicle diagnosis system.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

2

Remove voltage of high-voltage on-board electrical system.

AR47.70-D-1000TE

3

Check insulation resistance meter for proper operation and damage.



000 588 00 19 00 Insulation measuring unit

WS54.00-P-0046B

 Proper operation of insulation resistance meter must be ensured before start of tests according to manufacturer's specifications.

If there is a problem,



Replace insulation resistance meter.

4

Put on personal protective equipment (arc-fault protection jacket, safety mask, insulating gloves etc.).



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

SI54.10-P-0047A

 The following operation steps may only be performed while wearing personal protective equipment.
Observe safety regulations of corresponding country. These vary depending on the country concerned.



Check

5

Perform visual check of high-voltage components for activity and damage; also check the electrical connectors and electric lines for damage.

If there is a problem,



Perform suitable repair measures.

6

Check attachments and status of potential equalizations and protective ground conductors.

AR47.70-D-1020-01TE

 Check following attachments:
Protective ground conductor at DC current charge-connection unit
Equipotential bonding lines at body
Equipotential bonding line of DC current charge-connection unit and AC charger

 Nut, potential equalization ground line to body

*BA47.70-N-1006-02TE

 Nut, potential equalization ground line to high-voltage components holder in engine compartment

*BA47.70-N-1008-02TE

 Screw, potential equalization ground line/protective ground conductor to DC current charge-connection unit

*BA47.70-N-1009-02TE

 Bolt, ground line for potential equalization to AC charger

*BA47.70-N-1010-02TE

If there is a problem,



Perform suitable repair measures.

7

Perform protective ground conductor and insulation resistance test.

AR47.70-D-1030-03TE



000 588 00 19 00 Insulation measuring unit

WS54.00-P-0046B

 Screw, potential equalization ground line/protective ground conductor to DC current charge-connection unit

*BA47.70-N-1009-02TE

Concluding tasks

8

Take off personal protective equipment (arc-fault protection jacket, safety mask, insulating gloves etc.).

9

Put the high-voltage on-board electrical system into operation.

AR47.70-D-1000TE

 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-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