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Central electrical unit 342 in engine compartment (UEC)

Central electrical unit 342 in engine compartment (UEC)

Location

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

Main task

To be the central electrical unit for the front part of the car and manage certain parts of the logic for front lighting and visibility and signal system.

Distributes current from the battery to other central electrical units.

The central electrical unit contains the transport fuse (fuse 37).

Type

The central electrical unit with relays, maxi and micro fuses as well as integrated control module for logic functions.

Connection

The fuse box is connected to the battery and to the grounding points G30A, G31 and G33S. The central electrical unit is connected via three contacts at its bottom to the engine network, front network and main network.

Power circuit for +30

Power circuit for +15

The engine network is connected via contact M


Front network connected via contact F


The main network is connected via contact B


Fuses


The central electrical unit can be equipped with more fuses than those that have a function as listed below. They are then not connected to the car's wiring harness.

No. Amp Type Function Illustration
1 30 +30 Z19 (EDC16) via main relay 229: Control module, EDC16 (595B) Glow plug control module (596) Boost pressure control valve, charge air (179a) Heating element, heated oxygen sensors (271) Actuator unit, combustion circulation (403) Actuator unit, throttle body (604) Boost pressure control valve, EGR (606)
2 10 +30 Control module, TCM (502a/b) Control module, Trionic T8 (589A) Control module, ME9 (608B)
3 20 +30 Horn
4 10 +15 Control module TCM, AF 40 (502b) Battery disconnect switch (700) B207 (T8): Control module, Trionic T8 (589A) B284 (ME9): Control module, ME9 contact B (608B) Mass air flow sensor (205) Z19 (EDC16): Control module, EDC16 (595B) Module, mass air flow sensor (686) Water level switch, fuel filter (692) Unit, power steering unit (745)
5 -- --
6 10 +30 Control module, TCM, FA 57 (502a) Contact immobiliser, automatic (77) Gear selector, automatic (245) Immobiliser contact (411)
7 7,5 +15 Control module, headlamp, left (628FL)
8 5 +15 Unit, vacuum pump (459)
9 10 +15 Control module, AFL
10 --
11 --
12 10 +30 Washer fluid pump, rear windscreen (63c)
13 10 +30 EDC16: A/C-compressor (170)
14 --
15 30 +30 Engine, pump, high pressure, headlamp (668)
16 30 Lighting left front: Side indicators, dipped beam, fog lamps Lighting right front : Parking lamps, indicators, side indicators, main beam
17 30 Windscreen wiper motor, low speed
18 30 Windscreen wiper motor, high speed
19 20 +30 Parking heater, diesel (597) Connection, accessories (711)
20 10 +15 Motors, manual headlamp aligning (280) Control module, AHL (664) Control module, headlamp, right (682FR)
21 --
22 30 +30 Washer fluid pump, windscreen (63b)
23 --
24 20 +30 Auxiliary lamps
25 20 +30 Front amplifier (354F)
26 30 +30 Lighting left front: indicators, parking lamps, main beam Lighting right front: dipped beam, fog lamps
27 60 maxi 20 maxi +30 B207 (T8): Main fuse for central electrical unit 727 Z19 (EDC16): fuel pump (323)
28 40 maxi +30 Control module, TCS/ESP (382/671)
29 60 maxi +30 Main fuse 2 for cargo compartment central electrical unit
30 60 maxi +30 Main fuse 1 for instrument panel's central electrical unit
31 40 maxi +30 Starter motor's solenoid via relay 517
32 60 maxi +30 Main fuse 2 for instrument panel's central electrical unit
33 40 maxi +30 Control module, TCS/ESP (382/671)
34 60 maxi +30 Main fuse 1 for rear central electrical unit
35 30 maxi +30 B207: Cooling fan B248: Unit, vacuum pump
36 20 maxi +30 B207: Cooling fan EDC16: Heating element, fuel filter
37 60 maxi +30 Transport fuse. Main fuse 3 for rear central electrical unit


Relays

The central electrical unit can be equipped with more relays than those that have a function as listed below. They are then not connected to the car's wiring harness.

Location No. Denomination Illustration Diagram
R1 432b Relay, washer fluid pump, windscreen
R2 156 Relay, A/C compressor (Simtec and EDC16) EDC16
R3 --
R4 641 Relay, pre heating diesel
R5 675 Relay, auxiliary lamp
R6 68 Relay, fan
R7 229 Main relay, engine management system (Simtec and EDC16)
R8 517 Relay +50 B207 B284 Z19
R9 83 Relay, windscreen wiper
R10 432c Relay, washer fluid pump, rear windscreen
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 --