Electrical System - Volvo MD2010 Workshop Manual

General
The engines are fitted with AC generators. The system
voltage is 12V.
MD2010A, -2020A, -2030A and -2040A are fitted with a
1,5-pole* electrical system, while MD201OB/C, 2020B/
C, 2030B/C and 2040B/C have a one-pole system.
earthing relay.
Positioning of electrical components on the engine
68

Electrical system

Fig. 111. Positioning of electrical components on the engine
1. Starter motor
2. Earthing relay (A-version)
3. Glow plug
4. Alternator
5. Starter relay
6. Glow relay
7. Fuses (4 pcs),
max. 15A (+)
The electrical system also includes as accessories re-
l ays for the monitoring of the engine's refrigerant tem-
perature and oil pressure.
The electrical system is illustrated in two ways. The wir-
i ng diagram (page 80) shows the wiring, cable areas
and colours.
Where respective parts are positioned on the engine is
shown in the figures below.
8. Fuses (4 pcs),
max. 15A (-) (A-version)
9. Oil pressure relay,
(accessory)
10. Oil pressure sensor
11. Refrigerant temperature relay
(accessory)
12. Refrigerant temperature sensor
10