Remove/install electric drive control unit

AR08.20-S-0020EV

Remove/install electric drive control unit

26.11.2019

Engine

780.994 in model 639.603

with code MA0 (E-CELL 60 kW)

Under the front passenger seat box

Modification notes

18.10.2013

High voltage enable is not needed.

1

Cover

4

Relay holder

6

Tensioning strap

2

Quick-release coupling

5

Screw

7

Tool bag

3

Seat base

11

Electrical connectors

14

Bolts

8

Cap

12

Screw

F81/1

Pyrofuse

9

Electrical connector

13

Carrier plate

N3/16

Electric drive control unit 1

10

Electrical connector

 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

 

Remove/install

1

Disconnect battery ground line

AR54.10-S-0003EV

2.1

Remove front passenger bench seat seat cushion support

Engine 780.994 in model 639.603
with code MA0 (E-CELL 60 kW)
with code SH4 (Double seat bench on front passenger side, Comfort)Under the front passenger seat box

AR91.10-S-5035S

2.2

Remove front passenger seat cushion support

Engine 780.994 in model 639.603
with code MA0 (E-CELL 60 kW)
with code SB2 (Comfort co-driver's seat)Under the front passenger seat box

3

Release quick-release coupling (2) on covering (1), pull covering (1) slightly outwards from seat base (3) and pull towards arrow out of supports on driver seat frame (3)

4

Loosen tensioning strap (6) and remove tool bag (7) from the seat base (3)

5

Remove screw/bolts (5) at the relay holders (4)

 Bolt, relay holder to EDCU 1 bracket

*BA08.20-N-1003-01B

6

Disconnect electrical connection (10) from pyrofuse (F81/1)

7

Disconnect electrical connections (11) from EDCU 1 (N3/16)

8

Remove screw/bolt (12) from carrier plate (13)

9

Remove screw/bolts (14) on seat base (3)

10

Position carrier plate (13) with EDCU 1 (N3/16) and pyrofuse (F81/1) in seat base (3) in such a way that the electrical connection (9) is accessible

11

Release and disconnect electrical connection (9) from pyrofuse (F811)

 To unlock the cap (8) pry off using a suitable screwdriver and push back up to the end stop. Then detach the connector of the electrical connection (9) at the pyrofuse (F81/1).

12

Remove carrier plate (13) with EDCU 1 (N3/16) and pyrofuse (F81/1) from the seat base (3)

13

Remove EDCU 1 (N3/16) from the carrier plate (13)

When replacing electric drive control unit 1 (N3/16).

 Bolt, EDCU 1 to EDCU 1 bracket

*BA08.20-N-1002-01B

14

Install in the reverse order

15

Attach diagnostic system, put new EDCU 1 (N3/16) in operation and then read out fault memory or delete

When replacing electric drive control unit 1 (N3/16).



AD00.00-S-2000-04S

 Control units

Number

Designation

Engine 780.994 in model 639.603/703
with code MA0 (E-CELL 60 kW)

BA08.20-N-1002-01B

Bolt, EDCU 1 to EDCU 1 bracket

M5

Nm

2,5

 Control units

Number

Designation

Engine 780.994 in model 639.603/703
with code MA0 (E-CELL 60 kW)

BA08.20-N-1003-01B

Bolt, relay holder to EDCU 1 bracket

M5

Nm

2,5