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 task |
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.
The electrical centre contains the transport fuse (fuse 37).
Type |
Electrical centre with relays, maxi and micro-fuses and integrated control module for logic operations.
Connect |
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.
Power supply circuit for +30
Power supply circuit for +15
The engine harness is connected via switch M
M (engine harness)
Pin | Component/Function | In/Out |
1 | P-Bus | |
2 | Not connected | |
3 | Not connected | |
4 | Radiator fan 3 | In |
5 | Radiator fan 2 | In |
6 | A/C compressor | |
7 | Not connected | |
8 | ECM | |
9 | Switch, reverse gear | |
10 | Radiator fan 1 | |
11 | Not connected | |
12 | Not connected | |
13 | Not connected | |
14 | Control module, glow plug | Out |
15 | Main relay | |
16 | Control module, glow plug | |
17 | Start relay | |
18 | Not connected | |
19 | Not connected | |
20 | Not connected | |
21 | ECM (starting control) | |
22 | TCM (starting control) | |
23 | ECM main relay | In |
24 | ECM | |
25 | TCM | |
26 | ECM (diesel A/C relay) | |
27 | Clutch switch | In |
28 | ECM (starting control) | |
29 | Not connected | |
30 | P-Bus |
The front harness is connected via switch F
F (front harness)
Pin | Component/Function | In/Out |
1 | Parking light, right, front | Out |
2 | Direction indicator, right, front | Out |
3 | Direction indicator, left, front | |
4 | Side direction indicator, left, front | |
5 | Side marker lamp, right | |
6 | Side marker lamp, left | |
7 | Not connected | |
8 | Parking light, left, front | |
9 | Side direction indicator, right, front | |
10 | Fog light, right, front | |
11 | Wipers, front, park position | |
12 | Not connected | |
13 | Not connected | |
14 | Washer fluid, level sensor | |
15 | Not connected | |
16 | Dipped beam, right | |
17 | Main beam, left | |
18 | Parking heater | Out |
19 | Level control, headlamps | Out |
20 | Radiator fan, low-speed | Out |
21 | Main beam, right | |
22 | Pump, headlamp washer | |
23 | Not connected | |
24 | Radiator fan, high-speed | Out |
25 | Dipped beam, left | |
26 | Power ground | |
27 | Power ground | |
28 | Fuel filter, diesel | Out |
29 | Windscreen wiper motor, high-speed | |
30 | Windscreen wiper motor, low-speed | |
31 | Not connected | |
32 | Not connected | |
33 | Fog light, left, front | |
34 | Horn | |
35 | Auxiliary lamp | |
36 | Pump, windscreen washer | |
37 | I-bus | |
38 | Not connected | |
39 | Not connected | |
40 | Not connected | |
41 | Not connected | |
42 | Not connected | |
43 | Pump, rear window washer | |
44 | P-Bus | |
45 | P-Bus | |
46 | Not connected | |
47 | Radiator fan 3 | |
48 | Radiator fan 2 | |
49 | Radiator fan 1 | |
50 | I-bus |
The main harness is connected via switch B
B (main wiring harness)
Pin | Component/Function | In/Out |
1 | +15 feed | Out |
2 | I-bus | |
3 | I-bus | |
4 | Clutch switch | |
5 | Battery disconnect | Out |
6 | P-Bus | |
7 | Not connected | |
8 | +30 supply 2 to REC | Out |
9 | +30 power supply to ABS/ESP | Out |
10 | Not connected | Out |
11 | +30 supply 2 to IPBEC | Out |
12 | +30 supply 3 to REC | Out |
13 | +30 supply 1 to IPBEC | Out |
14 | +30 supply amplifier for front speakers | Out |
15 | +30 supply 1 to REC | Out |
16 | +30 supply logic to ABS/ESP | Out |
17 | P-Bus | |
18 | Electronic ground | |
19 | Brake/clutch switch | |
20 | +15 supply to TCM/TRS | Out |
21 | I-bus | |
22 | I-bus |
Fuses |
The electrical centre can contain a greater number of fuses than those listed below. In such cases, these are not connected to a wiring harness.
Relays |
The electrical centre can contain a greater number of relays than those listed below. In such cases, these are not connected to a wiring harness.
Location | No | Description | Picture | Diagram |
R1 | 432b | Relay, washer fluid pump, windscreen | ||
R2 | 156 | Relay, A/C compressor (Simtec and PSG16) | Simtec PSG16 | |
R3 | -- | |||
R4 | -- | |||
R5 | 666 675 | Relay, headlamp flasher (US/CA) Relay, auxiliary lamp (other markets) | ||
R6 | 68 | Horn relay | ||
R7 | 229 | Main relay, engine management system (Simtec and PSG16) | Simtec PSG16 | |
R8 | 517 | Relay, +50 | AUT petrol diesel | |
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 | -- |