SEAT OEM Head Unit Pinouts

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Find the connector diagram and pin assignments for your original SEAT radio. Select the matching head unit below.

Match the radio part number and connector keying before wiring. Confirm the viewing direction against the numbers on the connector. N.C. means no connection.

Seat 359 LHD
Master connector reference · 40-pin Quadlock
A12345678910111213141516FUSEBC123456789101112123456789101112

The source label uses a rotated view. Check the numbered cavities before wiring.

Quadlock block A · numbered reference view
15913
261014
371115
481216
Quadlock block A · pin assignments
Pin Function
1 Rear right +
2 Front right +
3 Front left +
4 Rear left +
5 Rear right −
6 Front right −
7 Front left −
8 Rear left −
9 CAN high
10 CAN low
11 Telephone mute
12 Ground (terminal 31)
15 Battery positive (terminal 30)
Quadlock block B · numbered reference view
123456
789101112
Quadlock block B · pin assignments
Pin Function
2 CD audio common
3 CD audio ground
4 CD supply
6 CD data out
8 CD left
9 CD right
10 CD control
11 CD data in
12 CD clock
Quadlock block C · numbered reference view
123456
789101112
Quadlock block C · pin assignments
Pin Function
6 Telephone audio −
12 Telephone audio +
SEAT Elba Car Stereo
Master connector reference · 36-pin ISO / mini-ISO
LINE OUTOPTIONCD14710131619369121518258111417201357246813572468CBA

The Elba label below shows the blocks rotated 180°, with A at the top.

Block C uses position labels in this guide because the Elba sticker gives signal names without terminal numbers. The diagram and table use the same position labels.

Block A · power and control · Elba label view
8642
7531
Block A · power and control
Pin Function
1 GA · vehicle speed signal
2 Mute input
3 K-BUS · diagnostic data line
4 S-Kont. · ignition key contact
5 Switched positive output (+)
6 Illumination
7 Ub+ · constant battery supply
8 Ground
Block B · front speakers · Elba label view
64
53
Block B · front speakers
Pin Function
3 Front right speaker +
4 Front right speaker −
5 Front left speaker +
6 Front left speaker −
Block C · changer and telephone · Elba label view
C1C2C3T1
C4C5T2
C6C7C8T3
Block C · changer and telephone
Position Function
C1 Top row, left · AF-R (right audio)
C2 Top row, centre · switched output symbol
C3 Top row, right · DATA-OUT
C4 Middle row, left · COM
C5 Middle row, right · CLOCK
C6 Bottom row, left · AF-L (left audio)
C7 Bottom row, centre · Ub+ (battery supply)
C8 Bottom row, right · DATA-IN
T1 Top · REM-C
T2 Middle · telephone audio −
T3 Bottom · telephone audio +
SEAT GP01 · radio variant check
Master connector reference · 40-pin Quadlock variant
A12345678910111213141516FUSEBC123456789101112123456789101112
Master connector reference · 36-pin ISO / mini-ISO
LINE OUTOPTIONCD14710131619369121518258111417201357246813572468CBA

ISO housing reference for comparison.

Coverage is limited to the clearly labelled Quadlock example. Confirm the exact GP01 radio and connector before use.

Quadlock block A · numbered reference view
15913
261014
371115
481216
Quadlock block A · pin assignments
Pin Function
1 Rear right +
2 Front right +
3 Front left +
4 Rear left +
5 Rear right −
6 Front right −
7 Front left −
8 Rear left −
9 CAN high
10 CAN low
12 Ground
15 Battery positive
Seat Quadlock RCD300-RCD500 Car Stereo connector
Master connector reference · 40-pin Quadlock
A12345678910111213141516FUSEBC123456789101112123456789101112
Quadlock block A · numbered reference view
15913
261014
371115
481216
Quadlock block A · pin assignments
Pin Function
1 Rear right +
2 Front right +
3 Front left +
4 Rear left +
5 Rear right −
6 Front right −
7 Front left −
8 Rear left −
9 CAN high
10 CAN low
11 Telephone mute
12 Ground (terminal 31)
15 Battery positive (terminal 30)
16 SAFE
Quadlock block B · numbered reference view
123456
789101112
Quadlock block B · pin assignments
Pin Function
1 Right headphone output
2 CD audio common
3 CD audio ground
4 CD supply
5 Left headphone output
6 CD data out
8 CD left
9 CD right
10 CD control
11 CD data in
12 CD clock
Quadlock block C · numbered reference view
123456
789101112
Quadlock block C · pin assignments
Pin Function
6 Telephone audio −
12 Telephone audio +
Seat S5 Snake High
Master connector reference · 36-pin ISO / mini-ISO
LINE OUTOPTIONCD14710131619369121518258111417201357246813572468CBA
ISO block A · numbered reference view
1357
2468
ISO block A · pin assignments
Pin Function
1 Speed signal (SCV)
2 Telephone mute
3 K-line
4 Switched supply (terminal 15)
5 Switched output
6 Illumination
7 Battery positive (terminal 30)
8 Ground
ISO block B · numbered reference view
1357
2468
ISO block B · pin assignments
Pin Function
1 Rear right +
2 Rear right −
3 Front right +
4 Front right −
5 Front left +
6 Front left −
7 Rear left +
8 Rear left −
ISO block C · numbered reference view
14710131619
369121518
25811141720
ISO block C · pin assignments
Pin Function
1 Telephone audio +
2 Telephone audio −
3 Telephone ground
7 AUX enable
8 AUX ground
10 AUX input
11 5 V supply
Seat S5 Snake Low
Master connector reference · 36-pin ISO / mini-ISO
LINE OUTOPTIONCD14710131619369121518258111417201357246813572468CBA
ISO block A · numbered reference view
1357
2468
ISO block A · pin assignments
Pin Function
2 Telephone mute
3 K-line
4 Switched supply (terminal 15)
5 Switched output
6 Illumination
7 Battery positive (terminal 30)
8 Ground
ISO block B · numbered reference view
1357
2468
ISO block B · pin assignments
Pin Function
1 Rear right +
2 Rear right −
3 Front right +
4 Front right −
5 Front left +
6 Front left −
7 Rear left +
8 Rear left −
ISO block C · numbered reference view
14710131619
369121518
25811141720
ISO block C · pin assignments
Pin Function
7 AUX enable
8 AUX ground
10 AUX input
11 5 V supply