PRE-RELEASE
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, G31 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 | Petrol: P-bus Diesel: A/C compressor | In/Out Out |
| 2 | Petrol: Not connected Diesel: P-bus | In/Out |
| 3 | Not connected | |
| 4 | Radiator fan 3 | In |
| 5 | Radiator fan 2 | In |
| 6 | Z18XE: A/C compressor Diesel: Main relay (coil) | Out |
| 7 | Not connected | |
| 8 | ECM | |
| 9 | Switch, reverse gear | |
| 10 | Radiator fan 1 | |
| 11 | Petrol: Not connected Diesel: Relay, preheating | Out |
| 12 | Not connected | |
| 13 | Not connected | |
| 14 | Simtec: Fuel pump Diesel: Glow plug control module; fuel pump | Out |
| 15 | Main relay | Out |
| 16 | Control module, glow plug | Out |
| 17 | Start relay | |
| 18 | Not connected | |
| 19 | Not connected | |
| 20 | Not connected | |
| 21 | ECM (starting control) | |
| 22 | TCM (starting control) | |
| 23 | Z18E: Main relay Diesel: Relay, preheating | In |
| 24 | ECM | |
| 25 | TCM | |
| 26 | Z18XE + Z19: A/C relay | |
| 27 | Clutch switch | In |
| 28 | ECM (starting control) | |
| 29 | Not connected | |
| 30 | P-Bus | In/Out |
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 | Not connected | |
| 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 feed to TCS/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 feed logic to TCS/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.
| No. | Amp | Type | Function | Illustration |
| 1 | 30 | +30 | EDC16 via main relay 229: ECD16 control module (595B) Glow plug control module (596) Boost pressure control valve (179a) Actuator, swirl throttle (403) Solenoid valve, EGR (603) Actuator, throttle body (604) Simtec via main relay 229: Control module, Simtec (705) Heated oxygen sensors (271) EVAP canister purge valve (321) Control valve, VIM damper (454) Module, mass air flow sensor (686) |
|
| 2 | 10 | +30 | TCM (502) Trionic T8 control module (589A) Simtec control module (705B) |
|
| 3 | 20 | +30 | Horn |
|
| 4 | 10 | +15 | T8: Trionic T8 control module (589A) Simtec: Simtec control module (705B) Module, ignition coils (552) Module, power steering unit (745) EDC16: ECD16 control module (595B) TCM, AF 40 (502b) Module, mass air flow sensor (686) Water level sensor, fuel filter (692) Module, power steering unit (745) |
|
| 5 | -- | -- | ||
| 6 | 10 | +30 | TCM, FA 57 (502a) Immobilizer switch, automatic (77) Gear selector, automatic (245) Immobilizer switch (411) |
|
| 7 | -- | |||
| 8 | -- | |||
| 9 | -- | |||
| 10 | -- | |||
| 11 | -- | |||
| 12 | -- | |||
| 13 | 10 | +30 | EDC16 and Simtec: A/C compressor (170) |
|
| 14 | -- | |||
| 15 | 30 | +30 | Motor, high-pressure headlight washer pump (668) |
|
| 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, diesel (597) Connection, accessories (711) |
|
| 20 | 10 | +15 | Motors, manual headlamp levelling (280) AHL control module (664) |
|
| 21 | -- | |||
| 22 | 30 | +30 | Washer fluid pump, windscreen |
|
| 23 | -- | |||
| 24 | 20 | +30 | Auxiliary lamp |
|
| 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 20 maxi | +30 | T8: Electrical centre 727 Simtec and EDC16: fuel pump (323) |
|
| 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 | B207 and Z18XE: Radiator fan |
|
| 36 | 20 maxi | +30 | B207: Radiator fan EDC16: Heating element, fuel filter |
|
| 37 | 60 maxi | +30 | Transport lock. Main fuse 3 for rear electrical centre |
| 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 | Illustration | Diagram |
| R1 | 432b | Relay, washer fluid pump, windscreen |
|
|
| R2 | 156 | Relay, A/C compressor (Simtec and EDC16) |
|
Simtec EDC16 |
| R3 | -- | |||
| R4 | 641 | Relay, diesel preheating |
|
|
| R5 | 675 | Relay, extra lights |
|
|
| R6 | 68 | Horn relay |
|
|
| R7 | 229 | Main relay, engine management system (Simtec and EDC16) |
|
|
| R8 | 517 | Relay, +50 |
|
AUT MAN 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 | -- |
