1. Battery concept Single battery electrical system
Single battery electrical system with auxiliary battery
Dual battery system

2. Onboard power supply-/Starter
Single battery electrical system R5 V6 V8
W12
Onboard power supply-/Starter
battery
Bordnetzbatterie
Back up fuse box
ABC

3. SD... ...under left front seat A Back up fuse box Battery front
Relays for terminal 15 J329
Isolation switch E74 A

4. Single battery electrical system+ -
OSP
Onboard power supply battery 12V 85 Ah
50 mm²
300A
SD 1 150A
SD5 60A
SD 2 150A
SD3 60 A
SD4 60A
6 mm²
6 mm²
6 mm²
Isolation switch (relay E74)
16 mm²
16 mm²
Onboard power supply

5. Single battery electrical system with additional battery
Auxiliary
battery
Onboard power supply-/starter
battery
ABC

6. SD... Back up fuse box Back up fuse box Battery front
... under left front seat
Relays for terminal 15 J329
Charging circuit relay J713
(for 2nd. battery)
Isolation switch E74
Battery rear

7. Single battery electrical system with auxiliary battery
Power supply battery 12V 85 Ah + +
OSP
250A
Auxiliary battery 12V 85 Ah S
Onboard power supply control unit G
300A
Charging circuit relay J713
F1 150A
F2 150A
F3 60A
F4 60A
F5 60A
16 mm²
F9 250A
F8 60A
16 mm²
6 mm²
6 mm²
6 mm²
Additional consumers
Zusatzverbraucher
Onboard power supply

8. Single battery electrical system with auxiliary battery
Power supply battery 12V 85 Ah + + -
OSP
250A
Auxiliary battery 12V 85 Ah
Battery 1
Battery 2
OPS CU
Charging circuit relay J713
F1 150A
F2 150A
F3 60A
F4 60A
F5 60A
F8 60A
16 mm²
F9 250A
16 mm²
6 mm²
6 mm²
6 mm²
Additional consumers
Zusatzverbraucher
Onboard power supply

9. Dual battery electrical system with starter battery
Onboard power supply battery
ABC

10. Charging circuit relay J713
Back up fuse box
SD...
... under left front seat
Battery front
Relays for terminal 15 J329
Charging circuit relay J713
(for starter battery)
Isolation switch E74 A
Battery rear

11. Dual battery electrical system with starter battery
Power supply battery 12V 85 Ah + - + -
OSP
250A
MIDI
Starter battery
12V 85 Ah
Relay for parallel switching of batteries J581 S G
Charging circuit relay J713
300A
F1 150A
F2 150A
F3 60A
F4 60A
F5 60A
F9 250A
6 mm²
6 mm²
6 mm²
16 mm²
16 mm²
Onboard power supply

12. Dual battery electrical system with starter battery Stand by
J 713
Onboard power supply control unit

13. Normal starting procedure
J581

14. Start procedure with discharged onboard power supply battery
J 710

15. Generator active

16. Dual battery electrical system
Components:
Onboard power supply battery A
Starter (auxiliary) battery A1
Charging circuit relay for auxiliary battery J713
(Relay for parallel switching J581)
In the onboard power supply system follow terminals are isolated
Terminal 15 Terminal 15 SV (start relevant consumer) Terminal 30

17. Dual battery electrical system
Terminal 15 (Standard consumer)
cables from ...
start and access authorization cu (Kessy) to E-box front
Terminal 15 SV (start relevant consumer)
...engine control units, fuel pumps, electronical
ignition lock, dash panel insert, airbag
Terminal 30
... onboard power supply battery to e-Box front and rear (normal consumer)

18. Fitting locations E-boxesD A G C B
Elektronik

19. Fitting locations dash panelB E

20. Fuse box dash panel left & right
Relay on
current CFD B E

21. C Fitting locations E-Box in plenum chamber left Relay locations
A1 Relay f. voltage supply terminal 30 C
Relay on current CFD
A2 Relay f. voltage supply terminal 30
A4 Relay f. glow plugs
A5 Relay f. auxiliary coolant pump
A6 Relay f. Pump fuel cooling
B2 Relay f. fuel pump
B3 Relay f. glow plugs
Relay locations
B4 Relay f. start relevant consumer
C20 Relay f. voltage supply terminal 50

22. Onboard power supply control unit
Fitting locations E-Box under dash panel center D
Kessy J518
Onboard power supply control unit

23. D Fitting locations E-Box under dash panel center Kessy-CU
zConnection Kessy-CU
Kessy-CU
Speaker for PDC
Onboard power supply control unit

24. Starter (auxiliary) battery
Starter battery
Vehicle identification number
Pressure accumulator
Fuse 250 A charging cable h
Starter (auxiliary) battery
Relay for parallel switching batteries J518

25. Fitting locations CU‘s luggage compartment right
Relay and plug station
DSP sound system
CD player
TV control unit
4C air suspension

26. Relay and plug station rear right
Cu for tilting sensor G384
Cu for trailer recognition J 345
Central cu for comfort system J393

27. Earth connections
645
646
614
644 13 18
608
647 12
640
631
638 33 45
637
610 34 32
639
632 39 50
664 58 49
667
666
665 51
ABC

28. Generator Air cooled 14V 150A Water cooled 14V 190A
Power supply
Generator
Air cooled
14V 150A
Water cooled
14V 190A
Maximal power for a short time 300 A

29. Generator drive train V10 TDI
Coolant connections
Hardy disk
Range-change gear
Sprocket configuration
S 28

30. Sprocket configuration
Generator drive train V10 TDI
Free wheeling clutch
Sprocket configuration

31. Fitting locations

32. Practice on the vehicle
Self- diagnosis with VAS 5051
Alternator load test
Practice on the vehicle
Testing on the vehicle