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Engine bay electrical centre 342 (UEC)

Engine bay electrical centre 342 (UEC)

Location

The electrical centre is located between the battery and the left front wing.

Main function

Act as the electrical centre for the front of the car and handle some parts of the logic for the front lighting as well as the visibility and signal systems.

Distributes current from the battery to the other electrical centres.

Type

Electrical centre with relays, maxi and micro-fuses and integrated control module for logic operations.

Connection

The fuse box is connected to the battery and to grounding points G30A, G30B and G33S. The electrical centre is connected via three switches in its base to the engine harness, front harness and main harness.

The engine harness is connected via switch M


The front harness is connected via switch F


The main harness is connected via switch B


Power supply circuit for +30

Power supply circuit for +15

Fuses


The electrical centre can be equipped with more fuses than those that have a function according to the list below. They are not then generally connected to the car's wiring harness.

No. Amp Type Function Illus.
1 30 +30 Diesel via main relay 229: PSG16 Glow plug control module Charge air control valve Solenoid valve, combustion circulation Solenoid valve, engine shut-off
2 10 +30 Trionic T8 TCM
3 20 +30 Horn
4 10 +15 petrol: Trionic T8 Battery disconnect switch diesel: PSG16, switch K Mass Air Flow Sensor, diesel EGR unit
5 --
6 10 +30 TCM Gear selector, automatic Immobilizer switch
7 --
8 20 +15 Fuel filter, diesel
9 --
10 --
11 --
12 --
13 10 +30 A/C compressor (diesel)
14 --
15 30 +30 Washer fluid pump, headlamp
16 30 Lighting, left front: Side direction indicators, dipped beam, fog light Lighting, right front : Position lamp, direction indicator, side direction indicator, main beam
17 30 Windscreen wiper motor, low-speed
18 30 Windscreen wiper motor, high-speed
19 20 +30 Parking heater Auxiliary heater Connection, accessories
20 10 +15 Motors, manual headlamp beam adjustment Automatic Headlamp Levelling
21 --
22 30 +30 Washer fluid pump, windscreen
23 --
24 20 +30 Auxiliary lamp Solenoid, screen, xenon lamp (US/CA/JP)
25 20 +30 Front amplifier
26 30 +30 Lighting, left front: direction indicator, position lamp, main beam Lighting, right front: dipped beam, fog light
27 60 maxi +30 Glow plug control module
28 40 maxi +30 TCS/ESP
29 60 maxi +30 Main fuse 2 for rear electrical centre
30 60 maxi +30 Main fuse 2 for dashboard electrical centre
31 40 maxi +30 Starter motor solenoid via relay 517
32 60 maxi +30 Main fuse 1 for dashboard electrical centre
33 40 maxi +30 TCS/ESP
34 60 maxi +30 Main fuse 1 for rear electrical centre
35 30 maxi +30 Radiator fans, high-speed
36 20 maxi +30 Radiator fans, low-speed
37 60 maxi +30 Transport lock. Main fuse 3 for rear electrical centre


Relays

The electrical centre can be equipped with more relays than those that have a function according to the list below. They are not then generally connected to the car's wiring harness.

Location No. Designation Illus. Diagram
R1 432b Relay, washer fluid pump, windscreen
R2 156 A/C compressor relay (diesel)
R3 --
R4 --
R5 666 Relay, headlamp flasher
R6 68 Horn relay
R7 229 Main relay, engine management system (diesel)
R8 517 Relay, +50 AUT MAN
R9 83 Windscreen wiper relay
R10 --
R11 757F Relay, +15, UEC
R12 709 Relay, windscreen wiper, full/half speed
R13 --
R14 667 Relay, washer fluid pump, high-pressure, headlamp
R15 --
R16 --