Check insulation resistance on high-voltage on-board electrical system · ar4770s1030f · Mercedes-Benz WIS

AR47.70-S-1030F

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

03.02.2020

Engine

780.701 in model 447

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

S47.70-A022-79

The high voltage components on the underbody are shown

6	High-voltage battery		8	High-voltage battery		12	High-voltage power distributor
7	High-voltage battery		10	Coolant circuit heater

S47.70-A023-79

The high voltage components in the engine compartment and under the socket flap are shown

17	Coolant circuit heater		27	DC/DC converter		33	Charger for high-voltage battery
19	High-voltage power distributor		30	Refrigerant compressor		35	Charger feed-in socket

 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 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
	Preparatory tasks
1	Process safety-related fault code using the diagnostic system.
			AD00.00-S-2000-04E
2	Remove voltage of high-voltage on-board electrical system.		AR47.70-S-1000F
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
		 Check that the insulation resistance meter and the     test adapters are working properly in accordance with the manufacturer's specifications before beginning the tests.
		 Test adapter	*000589946300
		 Test adapter	*000589926300
		 Test adapter	*222589026300
		 Test adapter	*222589056300
		If there is a problem,
		
		Replace insulation resistance meter or test adapters.
4	Remove left underfloor paneling.		AR61.30-S-1001F
	Check
5	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.	If there is a problem,
		
		Perform the respective repair measures.
6	Check earth lines for potential equalization of the high-voltage on-board electrical system and earth lines of the on-board electrical system battery.		AR47.70-S-1020-01F
		 Screw, potential equalization ground line to electric motor	*BA47.70-N-1001-02F
		 Nut, potential equalization ground line to high-voltage battery module	*BA47.70-N-1002-02F
		 Screw, potential equalization ground line to high-voltage battery	*BA47.70-N-1003-02F
		 Nut, potential equalization ground line to underbody	*BA47.70-N-1004-02F
		 Screw, potential equalization ground line to DC/DC converter	*BA47.70-N-1005-02F
		 Bolt, ground line for potential equalization to AC charger	*BA47.70-N-1006-02F
		 Nut, potential equalization ground line to bracket for charger, DC/DC converter, heater	*BA47.70-N-1007-02F
		 Nut, potential equalization ground line to bracket of coolant circuit heater for high-voltage battery	*BA47.70-N-1008-02F
		 Nut, potential equalization ground line to coolant circuit heater for high-voltage battery	*BA47.70-N-1009-02F
		 Nut, potential equalization ground line to vehicle interior heater	*BA47.70-N-1010-02F
		 Screw, potential equalization ground line to high-voltage power distributor in engine compartment	*BA47.70-N-1011-02F
		 Screw, potential equalization ground line to high-voltage power distributor on underbody	*BA47.70-N-1012-02F
		 Nut, potential equalization ground line to body	*BA47.70-N-1013-02F
		If there is a problem,
		
		Carry out repair measures on the corresponding earth line for potential equalization.
7	Carry out insulation resistance measurement on high-voltage on-board electrical system.		AR47.70-S-1030-01F
	000 588 00 19 00 Insulation measuring unit		WS54.00-P-0046B
		 Safety screw for locking element on high-voltage plug	*BA47.70-N-0003-01F
		 Test adapter	*000589926300
		 Test adapter	*000589946300
		 Test adapter	*222589026300
		 Test adapter	*222589056300
		If the measured values do not fall within the specified range,
		
		Replace the corresponding high voltage component or high voltage line.
		Remove/install axle drive module of front axle	AR08.10-S-0006F
		Remove/install high-voltage battery	AR47.70-S-0002F
		Remove/install coolant circuit heater of high-voltage battery cooling system	AR08.50-S-0004F
		Remove/install high-voltage power distributor on underbody	AR47.70-S-0004F
		Remove/install heater for vehicle interior coolant circuit	AR83.70-S-0019F
		Remove/install high-voltage power distributor in engine compartment	AR47.70-S-0003F
		Remove/install DC/DC converter	AR47.70-S-1500F
		Refrigerant compressor, remove/install	AR83.55-S-5310F
		Remove/install charger for high-voltage battery	AR47.70-S-1510F
8	Perform protective earth conductor and insulation resistance measurement on the vehicle socket.		AR47.70-S-1030-03E
	000 588 00 19 00 Insulation measuring unit		WS54.00-P-0046B
		If the measured values do not fall within the specified range,
		
		Replace corresponding high voltage component.
		Remove/install charger feed-in socket	AR47.70-S-0006F
		Remove/install charger for high-voltage battery	AR47.70-S-1510F
	Concluding tasks
9	Install left underfloor paneling.		AR61.30-S-1001F
10	Put the high-voltage on-board electrical system into operation.		AR47.70-S-1000F

 High-voltage power distributor

Number	Designation		Engine 780.701 in model 447
BA47.70-N-0003-01F	Safety screw for locking element on high-voltage plug	Nm	4