Check insulation resistance on high-voltage on-board electrical system · ar4770d1030te · Mercedes-Benz WIS

AR47.70-D-1030TE

Check insulation resistance on high-voltage on-board electrical system

08.01.2020

Engine

780.703 in model 910

Check insulation resistance on high-voltage on-board electrical system

Components of the high-voltage on-board electrical system on the underbody that are to be checked, shown with code E4T (high-voltage battery (47 kWh))

1	High-voltage batteries
2	High-voltage battery
3	Heater auxiliary circuit
4	Underbody high-voltage power distributor

D47.70-A039-76

D47.70-A038-78

Components of the high-voltage on-board electrical system in the engine compartment that are to be checked

5	Vehicle interior heater coolant circuit	8	Electric refrigerant compressor
6	Engine compartment high-voltage power distributor	9	High-voltage battery AC charger
7	DC/DC converter	10	Direct current charge connection unit

 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 the diagnostic 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 and the test adapters for proper operation and damage.
	000 588 00 19 00 Insulation measuring unit		WS54.00-P-0046B
		 Proper function of the insulation resistance meter and the      test adapters in accordance with the manufacturer's specifications must be ensured before beginning the tests.
		 Test adapter	*242589006300
		 Test adapter	*222589056300
		 Test adapter	*222589026300
		 Test adapter	*000589946300
		 Test adapter	*000589926300
		If there is a problem,
		
		replace the affected insulation resistance meter/test adapters.
4	Remove underfloor panels.		AR61.30-D-1001TS
5	Remove the left underfloor paneling on the high-voltage battery module.		AR61.30-D-1002TE
6	Remove the rear underfloor paneling on the high-voltage battery module.	Engine 780.703 in model 910 with code E4T (High-voltage battery (47 kWh))	AR61.30-D-1002TE
7	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 next steps. Observe the safety regulations of the corresponding country. These vary depending on the country concerned.
	Check
8	Visually check the high voltage components for activity and damage, and check the electrical connectors and electric lines for damage.	If there is a problem,
		
		perform suitable repair measures.
9	Check ground lines for high-voltage on-board electrical system potential equalization.		AR47.70-D-1020-01TE
		 Screw, potential equalization ground line to high-voltage power distributor in engine compartment	*BA47.70-N-1001-02TE
		 Screw, potential equalization ground line to high-voltage power distributor on underbody	*BA47.70-N-1002-02TE
		 Screw, potential equalization ground line to axle drive module	*BA47.70-N-1003-02TE
		 Nut, potential equalization ground line to high-voltage battery module	*BA47.70-N-1004-02TE
		 Screw, potential equalization ground line to high-voltage battery	*BA47.70-N-1005-02TE
		 Nut, potential equalization ground line to body	*BA47.70-N-1006-02TE
		 Screw, potential equalization ground line to DC/DC converter	*BA47.70-N-1007-02TE
		 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
		 Nut, potential equalization ground line to auxiliary circuit heater holder	*BA47.70-N-1011-02TE
		 Nut, potential equalization ground line to auxiliary circuit heater	*BA47.70-N-1012-02TE
		 Nut, potential equalization ground line to vehicle interior heater	*BA47.70-N-1013-02TE
10	Carry out insulation resistance measurement on high-voltage on-board electrical system.		AR47.70-D-1030-01TE
	000 588 00 19 00 Insulation measuring unit		WS54.00-P-0046B
		 Safety screw, locking element to high-voltage battery high-voltage plug	*BA47.70-N-1001-01TE
		 Safety screw, locking element to high-voltage power distributor high-voltage plug	*BA47.70-N-1001-03TE
		 Test adapter	*242589006300
		 Test adapter	*222589056300
		 Test adapter	*222589026300
		 Test adapter	*000589946300
		 Test adapter	*000589926300
11	Perform protective ground conductor and insulation resistance measurement.		AR47.70-D-1031TE
	Concluding tasks
12	Take off personal protective equipment (arc-resistant jacket, face mask, electrical protective gloves, etc.).
13	Install the rear underfloor paneling on the high-voltage battery module.	Engine 780.703 in model 910 with code E4T (High-voltage battery (47 kWh))	AR61.30-D-1002TE
14	Install the left underfloor paneling on the high-voltage battery module.		AR61.30-D-1002TE
15	Install underfloor paneling.		AR61.30-D-1001TS
16	Put the high-voltage on-board electrical system into operation.		AR47.70-D-1000TE

 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