Wiring Diagram SEAT LEON 2002 - Control unit with display for radio and navigation - control unit with display in dash panel insert
| D | Ignition/starter switch |
| G106 | Ambient temperature indicator |
| J... | Engine control units |
| J285 | Control unit with display in dash panel insert |
| J503 | Control unit with display for radio and navigation |
| S5 | Fuses in fuse box/relay plate |
| S10 | Fuse in fuse box/relay plate |
| S237 | Fuse in fuse box |
| T8b | 8-pin connector, on radio |
| T10 | 10-pin connector, orange, in protective housing for connectors, in plenum chamber, left |
| T16 | 16-pin connector, self-diagnosis |
| T20 | 20-pin connector, on radio |
| T26 | 26-pin connector |
| T32 | 32-pin connector, blue, on dash panel insert |
| A20 | Connection (15a), in dash panel wiring harness |
| A21 | Connection (86s), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Only models up to October 2001 |
| ** | Only models up to November 2001 |
Wiring Diagram SEAT LEON 2002 - Control unit with display for radio and navigation - headphone connection - CD changer
| F4 | Reversing light switch |
| J104 | ABS with EDL control unit |
| J226 | Starter inhibitor and reversing light relay |
| J503 | Control unit with display for radio and navigation |
| R13 | Headphone connection |
| R41 | CD changer |
| T3h | 3-pin connector |
| T10 | 10-pin connector, orange, in protective housing for connectors, on left in plenum chamber |
| T12a | 12-pin connector, in glove box |
| A87 | Connection (RL), in dash panel wiring harness |
| A133 | Connection (ABS impulses, left), in dash panel wiring harness |
| A134 | Connection (ABS impulse right), in dash panel wiring harness |
| V14 | Connection (screening), in CD changer wiring harness |
| * | Only models with manual gearbox |
| ** | Only models with automatic gearbox |
Wiring Diagram SEAT LEON 2002 - Control unit with display for radio and navigation - treble loudspeaker - rear left - bass loudspeaker - rear left - treble loudspeaker - front left - treble loudspeaker - front left
| J503 | Control unit with display for radio and navigation |
| R14 | Treble loudspeaker, rear left |
| R15 | Bass loudspeaker, rear left |
| R20 | Treble loudspeaker, front left |
| R21 | Bass loudspeaker, front left |
| R22 | Treble loudspeaker, front right |
| R23 | Bass loudspeaker, front right |
| R50 | Navigation aerial (GPS) |
| R51 | Radio/telephone aerial |
| T1 | Single connector, driver's door |
| T1a | Single connector, driver's door |
| T1b | Single pin connector, in glove box |
| T8b | 8-pin connector, on radio |
| T8d | 8-pin connector, on radio |
| T10i | 10-pin connector, black, coupling station left A-pillar |
| T10k | 10-pin connector, black, coupling station right A-pillar |
| T10l | 10-pin connector, black, coupling station left B-pillar |
Wiring Diagram SEAT LEON 2002 - Control unit with display for radio and navigation - treble loudspeaker - rear right - bass loudspeaker - rear right
| E20 | Lighting regulator-switches and instruments |
| J503 | Control unit with display for radio and navigation |
| R16 | Treble loudspeaker, rear right |
| R17 | Bass loudspeaker, rear right |
| T8b | 8-pin connector, on radio |
| T8d | 8-pin connector, on radio |
| T10m | 10-pin connector, black, connector point, right B pillar |
| T20 | 20-pin connector, on radio |
| |
| 255 | Earth connection -1-, in radio wiring harness |
| A11 | Positive (+) connection (58b), in dash panel wiring harness |
| V22 | Positive (+) connection (30a), in navigation wiring harness |
Wiring Diagram SEAT LEON 2002 - Mobile phone operating electronics control unit - telephone microphone - mobile phone
| D | Ignition and starter switch |
| J412 | Mobile phone operating electronics control unit |
| R38 | Telephone microphone |
| R54 | Mobile telephone |
| S8 | Fuse in fuse holder/relay plate |
| S12 | Fuse in fuse holder/relay plate |
| S242 | Fuse in fuse holder |
| T2o | 2-way connector |
| T18c | 18-way connector, central console |
| 501 | Bolted joint -2- (30), on the relay plate |
| A2 | Positive connection (15), instrument panel wiring harness |
| B111 | Positive connection -1- (30a), interior wiring harness |
| V34 | Connection (mute), telephone wiring harness |
SEAT LEON 2002 Overview of fuses
Overview of fuses | | | | 3 - | Fuse on fuse holder -S162-, -S163-, -S164-, -S176-, -S177-, -S178-, -S179-, -S180-, next to battery |
| q | Location, up to August 2000: |
| q | Location, from September 2000: |
SEAT LEON 2002 Position of fuses in fuse holder, left dash panel
Position of fuses in fuse holder, left dash panel | | No. | | Current Flow Diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | -S1- | 10A | - | Glove compartment light, heated washer jets | |
| 2 | - | -S2- | 10A | - | Turn signals | |
| 3 | - | -S3- | 5A | - | Side light warning lamp | |
| 4 | - | -S4- | 5A | - | Number plate light | |
| 5 | - | -S5- | 7.5A | - | Number plate light | |
| 6 | - | -S6- | 5A | - | Electric folding exterior mirror and window regulator (applicable up to October 2001)
Convenience system central control unit (applicable from November 2001) | |
| 7 | - | -S7- | 10A | - | Reversing light | |
| 8 | - | -S8- | 5A | - | Telephone | |
| 9 | - | -S9- | 5A | - | ABS/ESP/HALDEX | |
| 10 | - | -S10- | 10A | - | Petrol engine control unit (applicable up to October 2001)
Diesel engine control unit (applicable up to October 2001)
- S-contact (applicable from November 2001) | |
| 11 | - | -S11- | 5A | - | Dash panel insert | |
| 12 | - | -S12- | 7.5A | - | Diagnosis voltage | |
| 13 | - | -S13- | 10A | - | Brake lights | |
| 14 | - | -S14- | 10A | - | Interior light | |
| 15 | - | -S15- | 5A | - | Dash panel insert, steering angle sender | |
| 16 | - | -S16- | 10A | - | Compressor | |
SEAT LEON 2002 Position of fuses in fuse holder, left dash panel
| Toledo/León | Fitting Locations | No. 802 / 5 | | | Toledo/León | Fitting Locations | No. 802 / 6 | | | Toledo/León | Fitting Locations | No. 802 / 7 | | | Auxiliary fuse above additional relay carrier | | A - | Seat adjustment fuse -S45- (30 A) | | B - | Vacuum pump fuse (20 A) | | C - | Window regulator fuse -S37- (30 A) | | D - | Fuel charging hole fuse -S323- (10 A) | | E - | Alarm horn fuse -S111- (15 A) | | - | Turn signal fuse -S144- (15 A) | | | | | A - | Seat adjustment fuse -S45- (30 A) | | B - | Vacuum pump fuse (20 A) | | C - | Window regulator fuse -S37- (30 A) | | F - | Alarm horn fuse 1 -S111- (15 A) | | - | Turn signal fuse -S144- (15 A) | | G - | Fuel charging hole fuse -S323- (10 A) | | | | SEAT LEON 2002 Fuse on fuse holder, next to battery (up to August 2000): | Fuse on fuse holder, next to battery (up to August 2000): | | S162 - | Glow plug heater 50 A | | S163 - | Engine control unit 50 A | | S176 - | Passenger compartment, 110A | | S177 - | Alternator (90 A), 110 A | | - | Alternator (120 A), 150 A | | | | SEAT LEON 2002 Fuse on fuse holder, next to battery (from September 2000): | | 
