Subaru OEM Head Unit Pinouts

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Find the connector reference for your original Subaru radio, navigation unit or factory amplifier. Open a listing to see the part number, available pin tables.

Match the factory unit part number, connector keying, market and audio package before wiring. Confirm the pin numbering against the factory wiring diagram and check whether it shows the harness side or the radio socket. Wire colours and pin functions can vary by trim and year.

Shared harness

Shared 20-pin radio harness

Selected Impreza/WRX/STI from 2008, Forester from 2009 and Legacy/Liberty/Outback from 2010. Check navigation and audio package.

20-pin factory harness plug · terminal face
123456789
1020
111213141516171819
20-pin factory radio harness
Pin Signal
1 Illumination +
2 Dimmer
3 Accessory +12 V
4 Steering-wheel controls 1
5 Rear left speaker −
6 Rear left speaker +
7 Front left speaker −
8 Front left speaker +
9 Antenna booster power
10 Chassis ground
11 Varies by audio system
12 Varies by audio system
13 Varies by audio system
14 Steering-wheel control common, where fitted
15 Rear right speaker −
16 Rear right speaker +
17 Front right speaker −
18 Front right speaker +
19 Vehicle speed or battery feed, depending on variant
20 Battery +12 V

Forester

Forester 14-pin radio harness

Forester 1998–2008 connector reference. Check the exact radio on navigation-equipped vehicles.

14-pin factory harness plug · terminal face
123456
7891011121314
14-pin factory radio harness
Pin Signal
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Battery +12 V
7 Dimmer
8 Front right speaker −
9 Front left speaker −
10 Accessory +12 V
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Powered antenna / booster, where fitted
Forester P126 / P129 (1997–2006)

86201FE120 · 86201SA021 · 86201SA020

14-pin radio socket · terminal face
654321
1413121110987
CN701 · 14-pin radio socket
Pin Function
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Constant battery supply
7 Illumination −
8 Front right speaker −
9 Front left speaker −
10 Accessory supply
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Antenna control
CN702 · 16-pin accessory socket
omkigeca
pnljhfdb
CN702 · 16-pin accessory socket
Pin Function
a Right audio input
b Signal ground
c Left audio input
d NC
e NC
f NC
g Bus ground
h Bus signal
i Accessory supply
j Power ground
k Battery supply
l System mute
m Illumination control
n NC
o NC
p NC
Forester GX806EF2 (2002–2007)

86201SA200

074-0895-20 · connector positions as diagrammed
B/UBUS+BUS−MUTEBUS ONNCNCR CHL CHNAVI SIG
BUS OFFBUS GNDBUS GNDRESETNCNCNCNCAUDIO GNDNAVI GND
074-0895-20 · terminal positions
Pin Function
Top 1 B/U
Top 2 BUS+
Top 3 BUS−
Top 4 Mute
Top 5 Bus enable
Top 6 NC
Top 7 NC
Top 8 Right audio
Top 9 Left audio
Top 10 Navigation signal
Bottom 1 Bus off
Bottom 2 Bus ground
Bottom 3 Bus ground
Bottom 4 Reset
Bottom 5 NC
Bottom 6 NC
Bottom 7 NC
Bottom 8 NC
Bottom 9 Audio ground
Bottom 10 Navigation ground
Forester CP635U1 (2008–2013)

Clarion PF-3302B-A

J601 · main radio socket
987654321
2019181716151413121110
J601 · radio power and speaker socket
Pin Function
1 Illumination +
2 Illumination −
3 ACC
4 Steering control 1 +
5 Rear left speaker −
6 Rear left speaker +
7 Front left speaker −
8 Front left speaker +
9 Antenna enable
10 Ground
11 CAN −
12 CAN +
13 Steering control 2 +
14 Steering control return
15 Rear right speaker −
16 Rear right speaker +
17 Front right speaker −
18 Front right speaker +
19 NC
20 Battery supply
J602 · 16-pin socket
87654321
161514131211109
J602 · 16-pin socket
Pin Function
1 Mic input
2 Mic supply
3 AUX left +
4 AUX right −
5 Subwoofer control
6 Subwoofer +
7 Mic shield
8 NC
9 Mic ground
10 Mic detect
11 AUX left/right return
12 AUX enable
13 Subwoofer shield
14 Subwoofer −
15 Parking brake
16 Reverse
J801 · 20-pin socket
10987654321
20191817161514131211
J801 · 20-pin socket
Pin Function
1 Navigation +
2 Left audio +
3 Right audio +
4 NC
5 NC
6 Bus enable
7 Mute
8 Bus −
9 Bus +
10 Battery backup
11 Navigation −
12 Audio return
13 NC
14 NC
15 NC
16 NC
17 Reset
18 Bus ground
19 Ground
20 Bus off
J901 · 8-pin camera socket
4321
8765
J901 · camera socket
Pin Function
1 Camera video +
2 Camera switch
3 Camera supply (+5 V)
4 NC
5 Camera video −
6 Camera detect
7 Ground
8 NC
J902 · 4-pin socket
21
43
J902 · 4-pin socket
Pin Function
1 Ground
2 +5 V
3 Data +
4 Data −
P903 · 12-pin extension lead
654321
789101112
P903 · extension lead
Pin Function
1 NC
2 Video input
3 NC
4 NC
5 Left audio input
6 Right audio input
7 Right audio ground
8 Left audio ground
9 NC
10 Video detect
11 Video ground
12 NC
Forester P-130 (2004–2006)

86201SA110 · Matsushita CQ-EF7360K

14-pin radio socket · terminal face
654321
1413121110987
14-pin radio socket
Pin Function
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Constant battery supply
7 Illumination −
8 Front right speaker −
9 Front left speaker −
10 Accessory supply
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Antenna control
8-pin accessory socket · terminal face
7531
8642
CN702 · 8-pin socket
Pin Function
1 Signal +
2 Signal −
3 NC
4 Ground
5 NC
6 NC
7 Woofer +
8 Woofer −
13-pin round socket · terminal face
4321
8765
1211109
13
CN703 · 13-pin round socket
Pin Function
1 Right audio input +
2 Right audio input −
3 Left audio input +
4 Left audio input −
5 Signal ground
6 NC
7 PBUS input
8 PBUS clock
9 NC
10 NC
11 PBUS strobe
12 PBUS output
13 Power ground

Impreza / WRX / STI

Impreza / WRX 14-pin (1993–2007)

Wire colours vary by year. The source reports conflicting fitment feedback.

14-pin factory harness plug · terminal face
123456
7891011121314
14-pin factory radio harness
Pin Signal
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Battery +12 V
7 Dimmer
8 Front right speaker −
9 Front left speaker −
10 Accessory +12 V
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Powered antenna / booster, where fitted
WRX / STI navigation (2017–2018)

86271VA641

Connector A · 10-pin radio socket
4321
1098765
Connector A · pin assignments
Pin Function
A1 Front right +
A2 Front left +
A3 ACC
A4 Battery +
A5 Front right −
A6 Front left −
A7 Ground
A8 Antenna enable
A10 Illumination +
Connector B · 6-pin radio socket
21
6543
Connector B · pin assignments
Pin Function
B1 Rear right +
B2 Rear left + / INT+ with amp
B3 Rear right −
B4 SLD2 with amp
B5 Illumination −
B6 Rear left − / INT− with amp
28-pin auxiliary connector · reference terminal view, pin 1 upper right
1413121110987654321
2827262524232221201918171615
28-pin auxiliary connector
Pin Function
2 Reverse
3 Brightness
4 MACC
5 Microphone +
6 Microphone detect
7 TX1+ with amp
8 TX1− with amp
15 Parking brake
16 Mute with amp
17 Speed pulse
19 Microphone −
21 Steering control 1
22 Steering control 2
23 Steering control ground
25 AUX detect
26 AUX right +
27 AUX return
28 AUX left +
8-pin connector · pin 1 upper right
4321
8765
8-pin connector
Pin Function
8 Mute with amp
5-pin connector · pin 1 at right
54321
Rear camera connector
Pin Function
1 Camera ground
2 Camera supply
3 Video +
4 Video −
WRX radio (2017–2018)

86201VA680

Connector A · 10-pin radio socket
4321
1098765
Connector A · pin assignments
Pin Function
A1 Front right +
A2 Front left +
A3 ACC
A4 Battery +
A5 Front right −
A6 Front left −
A7 Ground
A8 Antenna enable
A10 Illumination +
Connector B · 6-pin radio socket
21
6543
Connector B · pin assignments
Pin Function
B1 Rear right +
B2 Rear left +
B3 Rear right −
B5 Illumination −
B6 Rear left −
28-pin auxiliary connector · reference terminal view, pin 1 upper left
1234567891011121314
1516171819202122232425262728
28-pin auxiliary connector
Pin Function
2 Reverse
3 Brightness
4 Microphone supply
5 Microphone +
6 Microphone detect
11 Camera supply (6 V)
12 Camera video +
13 Camera video − / shield
14 AUX shield ground
15 Parking brake
17 Speed pulse
18 Microphone shield ground
19 Microphone −
20 Camera ground
21 Steering control 1
22 Steering control 2
23 Steering control ground
25 AUX enable
26 AUX right +
27 AUX return
28 AUX left +
WRX / STI navigation without factory amp (2019–2022)

86431VA640

Connector A · 10-pin radio socket
4321
1098765
Connector A · pin assignments
Pin Signal
A1 FR+
A2 FL+
A3 ACC
A4 B+
A5 FR-
A6 FL-
A7 GND
A8 ANT-ON
A10 ILL+
Connector B · 6-pin radio socket
21
6543
Connector B · pin assignments
Pin Signal
B1 RR+
B2 RL+
B3 RR-
B5 ILL-
B6 RL-
28-pin auxiliary connector · reference terminal view, pin 1 upper left
1234567891011121314
1516171819202122232425262728
28-pin auxiliary assignments
Pin Function
1 IGN · 11-15V when IGN ON
2 REVERSE
3 BRIGHT
4 VCC
5 MIC+
6 DET
9 CAN+
10 CAN-
11 AC-UART (+)
12 AC-UART (-)
13 MIC2+
14 MIC2-
15 PKB · 1V or less at parking ON
17 SPEED · pulse signal when tire is rotating
18 SGND
19 MIC-
20 TEST
21 STEERING SW1+
22 STEERING SW2+
23 STEERING SW GND
24 DCM MUTE
25 FRONT ON
26 R SIG
27 R/L SIG
28 L SIG
5-pin connector · pin 1 at left
12345
Additional connector · documented terminals
Pin Function
1 GND
2 6V+
3 CA+
4 CA-
5 N/C
WRX / STI navigation with factory amp (2019–2022)

The source marks 86431VA640 as tentative for the amplified version.

Connector A · 10-pin radio socket
4321
1098765
Connector A · pin assignments
Pin Signal
A1 FR+
A2 FL+
A3 ACC
A4 B+
A5 FR-
A6 FL-
A7 GND
A8 ANT-ON
A10 ILL+
Connector B · 6-pin radio socket
21
6543
Connector B · pin assignments
Pin Signal
B2 INT+
B4 SLD2
B5 ILL-
B6 INT-
28-pin auxiliary connector · reference terminal view, pin 1 upper left
1234567891011121314
1516171819202122232425262728
28-pin auxiliary assignments
Pin Function
1 IGN · 11-15V when IGN ON
2 REVERSE
3 BRIGHT
4 VCC
5 MIC+
6 DET
7 AMP CAN+ · amplifier communication
8 AMP CAN- · amplifier communication
9 CAN+
10 CAN-
11 AC-UART (+)
12 AC-UART (-)
13 MIC2+
14 MIC2-
15 PKB · 1V or less at parking ON
16 MUTE
17 SPEED · pulse signal when tire is rotating
18 SGND
19 MIC-
20 TEST
21 STEERING SW1+
22 STEERING SW2+
23 STEERING SW GND
24 DCM MUTE
25 FRONT ON
26 R SIG
27 R/L SIG
28 L SIG
5-pin connector · pin 1 at right
54321
Additional connector · documented terminals
Pin Function
1 GND
2 6V+
3 CA+
4 CA-
5 N/C

Legacy / Liberty / Outback / Baja

Legacy / Liberty / Outback / Baja 14-pin (1993–2008)

Early model coverage varies by market.

14-pin factory harness plug · terminal face
123456
7891011121314
14-pin factory radio harness
Pin Signal
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Battery +12 V
7 Dimmer
8 Front right speaker −
9 Front left speaker −
10 Accessory +12 V
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Powered antenna / booster, where fitted
Legacy / Liberty / Outback GX-201LH (2003–2009)

86201AG400

14-pin radio socket · terminal face
654321
1413121110987
CN701 · numbered radio socket
Pin Function
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Constant battery supply
7 Illumination −
8 Front right speaker −
9 Front left speaker −
10 Accessory supply
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Antenna control
CN402 · satellite connector
Pin Function
1 NC
2 Satellite switch ground
3 NC
4 NC
5 Brightness
6 Satellite switch signal
7 NC
8 NC
Alternate 14-pin lettered connector · reference view
ABCDEF
GHIJKLMN
Alternate lettered connector
Pin Function
A Battery backup
B Rear left speaker +
C Rear right speaker +
D Front left speaker +
E Front right speaker +
F Illumination +
G Antenna control
H Rear left speaker −
I Rear right speaker −
J Ground
K ACC
L Front left speaker −
M Front right speaker −
N NC
Legacy / Liberty P128 (2003–2004)

86201AE36A · Panasonic CQ-EF1260L

14-pin radio socket · terminal face
654321
1413121110987
CN701 · 14-pin radio socket
Pin Function
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Constant battery supply
7 Illumination −
8 Front right speaker −
9 Front left speaker −
10 Accessory supply
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Antenna control
8-pin accessory socket · terminal face
7531
8642
CN708 · 8-pin socket
Pin Function
1 Signal +
2 Signal −
3 Telephone enable
4 Ground
5 NC
6 NC
7 Woofer +
8 Woofer −
13-pin round socket · terminal face
4321
8765
1211109
13
CN703 · 13-pin round socket
Pin Function
1 Right audio input +
2 Right audio input −
3 Left audio input +
4 Left audio input −
5 Signal ground
6 NC
7 PBUS input
8 PBUS clock
9 NC
10 NC
11 PBUS strobe
12 PBUS output
13 Power ground
Legacy / Liberty McIntosh PF-40621 (2003–2006)

Clarion McIntosh system. Match the factory amplifier and radio.

14-pin McIntosh radio socket · terminal face
1413121110987
654321
14-pin radio socket · pin assignments
Pin Function
1 Illumination +
2 N.C.
3 N.C.
4 N.C.
5 N.C.
6 Constant +12 V (memory backup)
7 Illumination −
8 N.C.
9 N.C.
10 Accessory power (ACC)
11 Ground
12 N.C.
13 N.C.
14 Automatic antenna output
20-pin round amplifier socket
1920
1415161718
910111213
45678
123
20-pin DIN amplifier socket · pin assignments
Pin Function
1 Subwoofer −
2 Subwoofer +
3 Ground
4 Front right −
5 Front right +
6 Ground
7 Rear left −
8 Rear left +
9 N.C.
10 N.C.
11 Ground
12 N.C.
13 N.C.
14 Front left −
15 Front left +
16 Amplifier turn-on signal
17 Rear right −
18 Rear right +
19 N.C.
20 N.C.

N.C. means no connection.

Legacy / Liberty / Outback Harman Kardon (2015–2017)

86271AL66A · 86271AL66B · 86271AL69A · 86271AL69B

Connector A · 10-pin radio socket
4321
1098765
Connector A · pin assignments
Pin Signal
A1 FRONT-RH (+)
A2 FRONT-LH (+)
A3 ACC
A4 +B (always 11 — 15 V)
A5 FRONT-RH (–)
A6 FRONT-LH (–)
A7 GND
A8 ANTENNA-ON
A9 n/a
A10 ILLUMI (+)
Connector B · 6-pin radio socket
21
6543
Connector B · pin assignments
Pin Signal
B1 n/a
B2 INT+
B3 n/a
B4 SLD2
B5 ILLUMI (–)
B6 INT (–)
28-pin auxiliary connector · reference terminal view, pin 1 upper left
1234567891011121314
1516171819202122232425262728
28-pin auxiliary assignments
Pin Function
1 IGN
2 REV
3 BRIGHT
4 MACC
5 MIC+
6 MIC DET
7 TX1+ (for brand AMP communication)
8 TX1– (for brand AMP communication)
9 CAN+
10 CAN–
11 AC-UART (+)
12 AC-UART (–)
13 n/a
14 SHIELD-GND (AUX)
15 PKB (at parking ON 1 V or less)
16 MUTE
17 SPD (when the tire is rotating - pulse signal)
18 SHIELD-GND (MIC)
19 MIC-
20 n/a
21 SW1
22 SW2
23 SWG
24 n/a
25 AUX-DET
26 AUX-R (+)
27 AUX-LR (–)
28 AUX-L (+)
5-pin connector · pin 1 at right
54321
Additional connector · documented terminals
Pin Function
1 CGND
2 CB+
3 CV+
4 CV–
5 n/a

Tribeca

Tribeca P136 (2006–2010)

86201XA03A · Panasonic CQ-EF8560

14-pin radio socket · terminal face
654321
1413121110987
CN701 · 14-pin radio socket
Pin Function
1 Illumination +
2 Front right speaker +
3 Front left speaker +
4 Rear right speaker +
5 Rear left speaker +
6 Constant battery supply
7 Illumination −
8 Front right speaker −
9 Front left speaker −
10 Accessory supply
11 Chassis ground
12 Rear right speaker −
13 Rear left speaker −
14 Antenna control
CN402 · 16-pin socket
7654321
1615141312111098
CN402 · 16-pin socket
Pin Function
1 Subwoofer −
2 NC
3 NC
4 Rear entertainment mute
5 Rear enable
6 Rear entertainment left −
7 Rear entertainment left +
8 Subwoofer +
9 NC
10 NC
11 Satellite switch +
12 Satellite switch −
13 Front enable
14 Shield ground
15 Rear entertainment right +
16 Rear entertainment right −
CN405 · 8-pin socket
4321
8765
CN405 · 8-pin socket
Pin Function
1 Ignition
2 NC
3 UART +
4 NC
5 Ground −
6 NC
7 UART −
8 NC
CN703 · 20-pin socket
10987654321
20191817161514131211
CN703 · 20-pin socket
Pin Function
1 Navigation
2 Left audio
3 Right audio
4 NC
5 NC
6 Bus enable
7 Mute
8 Bus −
9 Bus +
10 Battery backup
11 Navigation ground
12 Audio ground
13 NC
14 NC
15 NC
16 NC
17 Reset
18 Bus ground
19 Battery ground
20 Bus off
CN901 · 24-pin socket
121110987654321
242322212019181716151413
CN901 · 24-pin socket
Pin Function
1 Ground
2 8 V illumination
3 LED PWM
4 VH
5 VFL
6 Sub enable
7 Sub CE
8 Sub data
9 Sub reset
10 Power switch
11 HC RX
12 Ignition
13 Ground
14 NC
15 NC
16 5 V VDD
17 5 V ACC
18 NC
19 Key data
20 Sub clock
21 CD load
22 CD eject
23 HC TX
24 Ground
JX101 · antenna socket
123
JX101 · antenna socket
Pin Function
1 NC
2 Main antenna
3 NC
Tribeca CX-WF8561Z

86255XA00AMV

24-pin connection from CN700 · pin 1 at lower left
131415161718192021222324
123456789101112
CN700 branch · 24-pin connector
Pin Function
1 AUX video +
2 AUX right audio +
3 AUX left audio +
4 Shield
5 Shield ground
6 Video signal (NTSC)
7 Ground
8 Rear enable
9 Front enable
10 NC
11 ACC
12 Battery supply
13 AUX video −
14 AUX right audio −
15 AUX detection
16 NC
17 Mute output
18 Shield
19 Right audio out +
20 Right audio out −
21 Left audio out +
22 Left audio out −
23 NC
24 Illumination

Factory amplifiers

Harman Kardon amplifier (2014–2018)

86221VA010 · 86221VA030 · 86221SG010

Connector pin assignments at the factory amplifier. Match the part number and connector keying, then check terminal numbering against the wiring diagram for your vehicle. Pins absent from the tables are undocumented here.

24-pin amplifier connector · pin 1 at upper right
121110987654321
242322212019181716151413
24-pin connector · audio inputs and control
Pin Function
2 Left audio input −
3 Left audio input +
4 Right audio input −
5 Right audio input +
6 Audio shield ground
10 EQ selection
11 Vehicle speed pulse
12 Accessory supply (ACC)
22 Interrupt signal −
23 Interrupt signal +
10-pin amplifier connector · keyed gap at top
4321
1098765
10-pin connector · battery and door speakers
Pin Function
1 Battery supply (+B)
2 Left rear door speaker +
3 Right front door speaker +
4 Left front door speaker −
5 Battery supply (+B)
6 Left rear door speaker −
7 Right rear door speaker −
8 Right rear door speaker +
9 Right front door speaker −
10 Left front door speaker +
12-pin amplifier connector · keyed gap at top
54321
1211109876
12-pin connector · dash speakers, subwoofer and ground
Pin Function
1 Right dash speaker −
2 Right dash speaker +
3 Left dash speaker −
4 Subwoofer circuit 1 +
5 Subwoofer circuit 2 +
6 Ground (GND)
7 Ground (GND2)
9 Left dash speaker +
10 Subwoofer circuit 1 −
12 Subwoofer circuit 2 −
WRX / STI factory amplifier (2019–2022)

Match the amplifier connectors and audio package.

Amplifier supply and control connector
Pin Function
5 TX−
6 TX+
7 IL1+
8 ACC
12 Constant battery supply
21 IL−
25 Ground
28-pin amplifier connector · pin 1 upper right
151413121110987654321
28272625242322212019181716
Amplifier audio connector
Pin Function
1 FR+
2 TWR+
3 RR+
4 WF2 (polarity unspecified)
6 L+
7 R+
12 WF1+
13 RL+
14 TWL+
15 FL+
16 FR−
17 TWR−
18 RR−
19 WF2−
20 L−
21 R−
25 WF1−
26 RL−
27 TWL−
28 FL−