Rev 03 22nd September 2010 http://S2central.

net

1 2 3 4 5 6

7 8 9 10 11

Main Fusebox - Central Electric Panel (CEP)

13 14 15 16 17 18
1 2 3
Manual
4 5 6
7 8 9 10 11 12
Front Auxiliary Block - Above driver's pedals
Positions 7 & 8 are not applicable to RHD

Rear Auxiliary Block - underneath rear seat

 Rev 03 22nd September 2010 http://S2central.net

ONLY applicable to MY1991 3B Engined Audi Coupe S2 (B3) MY91 = VIN letter "M"

NOTE: Some relay positions are different if the car has factory fitted aircon or climate control.
To avoid confusion, the CEP relay configuration is shown with and without manual aircon & climate control options.
The addition of a relay for the cabin fan for manual aircon vehicles moves some relays around to make room for them all in the CEP.
These are part numbers 'of the day' and may have been superseded by alternative numbers (check the parts system) …

Central Electric Panel (CEP) aka "Main Fusebox" - WITHOUT air conditioning
CEP Description LABEL Notes Schematic Part Number
1 Front Fog Lights 204 SPST - 40A J5 431 951 253 H
2 UNUSED - Used on other/older models - -
Special relay module here,
3 Radiator Fan Lo-Speed (Speed 1) TBA J138 ???
triggered by J155
4 Headlight washers 275 This is unfused so be careful ! J39 443 955 535
5 X-Contact Relief 213 SPST - 60A fat pins J69 443 951 253 J
6 Radiator Fan Hi-Speed-2 (Speed 3) TBA Activated by rad-switch F54 J101 ???
7 Horn 204 SPST - 40A J4 431 951 253 H
8 Anti-Theft Interlock 204 SPST - 40A J226 431 951 253 H
229 Factory item with fixed delay 431 955 531
9 Windscreen wipers / washers J31
197 Programmable version 3B0 955 131
10 Fuel Pump 208 S2 / RS2 specific module J17 8A0 951 253 B
11 Radiator Fan Hi-Speed-1 (Speed 2) TBA Activated by rad-switch F18 J26 ???

Central Electric Panel (CEP) aka "Main Fusebox" - WITH manual air conditioner
CEP Description LABEL Notes Schematic Part Number
1 Front Fog Lights 204 SPST - 40A J5 431 951 253 H
Activated by rad-switch F54 or
2 Radiator Fan Hi-Speed-2 (Speed 3) TBA J101 ???
aircon switch F23
Special relay module here,
3 Radiator Fan Lo-Speed (Speed 1) TBA J138 ???
triggered by J155
4 Headlight washers 275 This is unfused so be careful ! J39 443 955 535
5 X-Contact Relief 213 SPST - 60A fat pins J69 443 951 253 J
Only applicable to manual aircon
6 Cabin Blower Fan 214 J11 443 951 253 K
system
7 Horn 204 SPST - 40A J4 431 951 253 H
8 Anti-Theft Interlock 204 SPST - 40A J226 431 951 253 H
229 Factory item with fixed delay 431 955 531
9 Windscreen wipers / washers J31
197 Programmable version 3B0 955 131
10 Fuel Pump 208 S2 / RS2 specific module J17 8A0 951 253 B
Activated by rad-switch F18 or
11 Radiator Fan Hi-Speed-1 (Speed 2) TBA J26 ???
when aircon is switched ON

Central Electric Panel (CEP) aka "Main Fusebox" - WITH automatic climate control (aka Digital Air Conditioner)
CEP Description LABEL Notes Schematic Part Number
1 Front Fog Lights 204 SPST - 40A J5 431 951 253 H
2 UNUSED - Used on other/older models - -
Special relay module here,
3 Radiator Fan Lo-Speed (Speed 1) TBA J138 ???
triggered by J155
4 Headlight washers 275 This is unfused so be careful ! J39 443 955 535
5 X-Contact Relief 213 SPST - 60A fat pins J69 443 951 253 J
Activated by rad-switch F54 or
6 Radiator Fan Hi-Speed-2 (Speed 3) TBA J101 ???
aircon switch F23
7 Horn 204 SPST - 40A J4 431 951 253 H
8 Anti-Theft Interlock 204 SPST - 40A J226 431 951 253 H
229 Factory item with fixed delay 431 955 531
9 Windscreen wipers / washers J31
197 Programmable version 3B0 955 131
10 Fuel Pump 208 S2 / RS2 specific module J17 8A0 951 253 B
11 Radiator Fan Hi-Speed-1 (Speed 2) TBA Activated by rad-switch F18 J26 ???

Front Auxiliary Block (FAB)

FAB Description LABEL Notes Schematic Part Number
1 NOT USED TBA ABS relay on older models ??? ???
2 Buzzer for lights on (key out) 292 Wired to bulb monitor & radio J152 443 951 307 B
This predates integration of that
3 Light delay relay TBA J140 ???
function with central locking
??? ??? used on manual system J153 ???
4 Compressor clutch control
??? ??? used for climate control J32 ???
5 Controller for afterrun pump (or FAB#12) 324 Triggers J138 for Speed-1 J155 447 965 571 A
6 Bulb monitoring (Front) 281 Connected to Autocheck J123 443 919 469 (B)
7 Damper for fuel gauge 341 Some LHD models only J273 8A0 907 525
8 UNUSED - used on other/older models - -
9 UNUSED - used on other/older models - -
10 Daytime running lights TBA Certain LHD territory only J336 ???
11 UNUSED - used on other/older models - -
12 Controller for afterrun pump (or FAB#5) 324 Triggers J138 for Speed-1 J155 447 965 571 A
13 UNUSED - used on other/older models - -
14 Seat Heating, driver TBA driver probably means LEFT ??? ???
15 287 & Double Width Module. Early 443 959 257
Electric Windows & Sunroof J139
16 others version has 1TWD & 1TWU. B/C/D variants
17 UNUSED - used on other/older models - -
18 Seat Heating, passenger TBA probably means RIGHT seat ??? ???

Rear Auxiliary Block (RAB)

RAB Description LABEL Notes Schematic Part Number
19 Relay for disabling rear fog light TBA Factory trailer wiring J269
20 Interval relay for rear wiper 239 Coupe & Avant J30 445 955 529 A
21 UNUSED - - - -
22 Combi relay for ABS TBA Up to 10/92 only J156
 Rev 03 22nd September 2010 http://S2central.net

ONLY applicable to MY1992/1993 3B Engined Audi Coupe S2 (B3) MY92 & MY93 = VIN letter "N" & "P"

NOTE:
Some oddities around options for aircon here also. All options captured below.

These are part numbers 'of the day' and may have been superseded by alternative numbers (check the parts system) …

Central Electric Panel (CEP) aka "Main Fusebox" - with OR without manual air conditioning
CEP Description LABEL Notes Schematic Part Number
1 Front Fog Lights 204 SPST - 40A J5 431 951 253 H
Activated by switch F54 or
2 Radiator Fan Hi-Speed-2 (Speed 3) 217 J135 443 951 253 S
switch F23 with aircon
3 Radiator Fan Lo-Speed (Speed 1) 214 SPST - 40A, triggered by J155 J26 443 951 253 K
4 Headlight washers 275 This is unfused so be careful ! J39 443 955 535
5 X-Contact Relief 213 SPST - 60A fat pins J69 443 951 253 J
6 Cabin Blower Fan 214 ONLY with manual aircon J11 443 951 253 K
7 Horn 204 SPST - 40A J4 431 951 253 H
8 Anti-Theft Interlock 204 SPST - 40A J226 431 951 253 H
229 Factory item with fixed delay 431 955 531
9 Windscreen wipers / washers J31
197 Programmable version 3B0 955 131
10 Fuel Pump 208 S2 / RS2 specific module J17 8A0 951 253 B
Activated by rad-switch F18 &
11 Radiator Fan Hi-Speed-1 (Speed 2) 214 J101 443 951 253 K
when aircon is turned ON

Central Electric Panel (CEP) aka "Main Fusebox" - WITH digital air conditioning (climate control)
CEP Description LABEL Notes Schematic Part Number
1 Front Fog Lights 204 SPST - 40A J5 431 951 253 H
2 UNUSED - - - -
3 Radiator Fan Lo-Speed (Speed 1) 214 SPST - 40A, triggered by J155 J26 443 951 253 K
4 Headlight washers 275 This is unfused so be careful ! J39 443 955 535
5 X-Contact Relief 213 SPST - 60A fat pins J69 443 951 253 J
Activated by switch F54 or
6 Radiator Fan Hi-Speed-2 (Speed 3) 217 J135 443 951 253 S
switch F23 with climate
7 Horn 204 SPST - 40A J4 431 951 253 H
8 Anti-Theft Interlock 204 SPST - 40A J226 431 951 253 H
229 Factory item with fixed delay 431 955 531
9 Windscreen wipers / washers J31
197 Programmable version 3B0 955 131
10 Fuel Pump 208 S2 / RS2 specific module J17 8A0 951 253 B
Activated by rad-switch F18 &
11 Radiator Fan Hi-Speed-1 (Speed 2) 214 J101 443 951 253 K
when aircon is turned ON

Front Auxiliary Block (FAB)

FAB Description LABEL Notes Schematic Part Number
1 UNUSED - used on other/older models - -
2 UNUSED - used on other/older models - -
It has been known to see this
3 Should be UNUSED - - -
position used in lieu of #4
??? ??? used on manual system J153 ???
4 Compressor clutch control
??? ??? used for climate control J44 ???
5 287 & Double Width Module. Early 443 959 257
Electric Windows & Sunroof J139
6 others version has 1TWD & 1TWU. B/C/D variants
7 Damper for fuel gauge 341 Some LHD models only J273 8A0 907 525
8 UNUSED - used on other/older models - -
9 UNUSED - used on other/older models - -
10 Daytime running lights TBA Certain LHD territory only J336 ???
11 UNUSED - used on other/older models - -
12 Buzzer for lights on (key out) 292 Wired to bulb monitor & radio J152 443 951 307 B
13 UNUSED - used on other/older models - -
14 Controller for afterrun pump 324 Triggers J26 for Speed-1 J155 447 965 571 A
15 Bulb monitoring (Front) 281 Connected to Autocheck J123 443 919 469 (B)
16 UNUSED - used on other/older models - -
17 Cutoff Relay for Solar / Sliding Roof ??? Very exotic option J309 ???
18 UNUSED - used on other/older models - -

Rear Auxiliary Block (RAB)

RAB Description LABEL Notes Schematic Part Number
19 Relay for disabling rear fog light TBA Factory trailer wiring J269
20 Interval relay for rear wiper 239 Coupe & Avant J30 445 955 529 A
21 UNUSED - - - -
22 Combi relay for ABS TBA Up to 10/92 only J156
 Rev 03 22nd September 2010 http://S2central.net

Applicable ONLY to ABY & ADU vehicles from MY1993 (Oct 1992) onwards - B3 & B4 platforms VIN letters "P R S T"

NOTE: Much official Audi documentation about relay positions is incorrect for S2/RS2 as it is generic to most other models
MY1991 & 1992 3B Coupe has many differences that are NOT captured on this page.
These are part numbers 'of the day' and may have been superseded by alternative numbers (check the parts system) …

Central Electric Panel (CEP) aka "Main Fusebox"

CEP Description LABEL Notes Schematic Part Number
1 Front Fog Lights 204 SPST - 40A J5 431 951 253 H
2 UNUSED on S2/RS2 - Used on other/older models - -
3 Radiator Fan Lo-Speed (Speed 1) 214 SPST - 40A triggered by J155 J26 443 951 253 K
4 Headlight washers 275 This is unfused so be careful ! J39 443 955 535
5 X-Contact Relief 213 SPST - 60A fat pins J69 443 951 253 J
6 Cabin Blower Fan 214 Not used with climate control J11 443 951 253 K
7 Horn 204 SPST - 40A J4 431 951 253 H
8 Anti-Theft Interlock 204 SPST - 40A J226 431 951 253 H
229 Factory item with fixed delay 431 955 531
9 Windscreen wipers / washers J31
197 Programmable version 3B0 955 131
10 Fuel Pump 208 S2 / RS2 specific module J17 8A0 951 253 B
Activated by rad-switch F18 or
11 Radiator Fan Hi-Speed-1 (Speed 2) 214 J101 443 951 253 K
switch F23 with aircon/climate

Front Auxiliary Block (FAB)

FAB Description LABEL Notes Schematic Part Number
1 UNUSED on S2/RS2 - used on other/older models - -
2 UNUSED on S2/RS2 - used on other/older models - -
It has been known to see this
3 Should be UNUSED on S2/RS2 - - -
position used in lieu of #4
305 305 used on manual system J153 443 919 578 J
4 Compressor clutch control
267 267 used for climate control J44 443 919 578 C
5 287 & Double Width Module. Early 443 959 257
Electric Windows & Sunroof J139
6 others version has 1TWD & 1TWU. B/C/D variants
7 Damper for fuel gauge 341 Some LHD models only J273 8A0 907 525
8 Immo-A Relay-2 (NOT IMMO-1) 205 NOT used on RHD J342 431 951 253 D
9 Airbag warning lamp 206 Not applicable to all airbags J312 431 951 253 F
204 RHD 431 951 253 H
10 Immo-A Relay-1 (NOT IMMO-1) J341
364 LHD 4A0 951 258
11 Daytime running lights TBA Certain LHD territory only J336 ???
12 Buzzer for lights on (key out) 292 Wired to bulb monitor & radio J152 443 951 307 B
13 UNUSED on S2/RS2 - used on other/older models - -
14 Controller for afterrun pump 324 Triggers J26 for Speed-1 J155 447 965 571 A
15 Bulb monitoring (Front) 281 Connected to Autocheck J123 443 919 469 (B)
16 Trailer Recognition Module NONE RS2 only TBA 8A0 937 541
17 Cutoff Relay for Solar / Sliding Roof ??? Very exotic option J309 ???
18 Radiator Fan Hi-Speed-2 (Speed 3) 217 Activated by switch F54 J135 443 951 253 S

Rear Auxiliary Block (RAB)

RAB Description LABEL Notes Schematic Part Number
19 Relay for disabling rear fog light TBA Factory trailer wiring J269
20 Interval relay for rear wiper 239 Coupe & Avant J30 445 955 529 A
21 UNUSED - - - -
22 Combi relay for ABS TBA Up to 10/92 only J156