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20 pin Nissan Head Unit Audio main connector layout
20 pin Nissan Head Unit Audio main connector
p/n 28185-3KA1A

Pin
Num
W/C Signal
2 SB
Sound signal front door speaker and instrument panel tweeter LH (+)
 
3 V
Sound signal front door speaker and instrument panel tweeter LH (-)
 
4 BR
Sound signal rear door speaker LH (+)
 
5 Y
Sound signal rear door speaker LH (-)
 
6 Y Steering switch signal A
Press SOURCE switch 0V
Press switch 1.0V
Press switch 2.0V
Press ENTER switch 4.0V
Except above 5.0
7 P
ACC power supply
 
8 P
Illumination control signal (-)
 
9 R
Illumination control signal (+)
 
11 BR
Sound signal front door speaker and instrument panel tweeter RH (+)
 
12 Y
Sound signal front door speaker and instrument panel tweeter RH (-)
 
13 L
Sound signal rear door speaker RH (+)
 
14 SB
Sound signal rear door speaker RH (-)
 
15 G
Steering switch signal ground
 
16 BR Steering switch signal B
Press VOL DOWN switch 0V
Press VOL UPswitch 1.0V
Press BACK switch 3.0V
Press DISP switch 4.0V
Except above 5.0V
19 Y
Battery power supply
 

W/C stands for Wire Color. It is for Pathfinder 2014 and very dependent on model and model year.

Pin
Num
W/C Signal
21 LG
AV communication signal (L)
 
22 SB
AV communication signal (H)
 
12 pin Nissan Head Unit connector layout
12 pin Nissan Head Unit connector
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