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20 pin Nissan Head Unit Audio main connector layout
Разъем 20 pin Nissan Head Unit Audio main

 

Pin
Number
W/C Signal
1 B/P Amp ON signal (+12V)
2 G
Pre amp sound signal front LH (+) Out
 
3 R Pre amp sound signal front LH (-) Out
4 GR/V
Pre amp sound signal rear LH (+) Out
 
5 W/L Pre amp sound signal rear LH (-) Out
6 W/G Steering switch signal A
Press SOURCE switch. 0 V
Press UP switch. 1.0 V 
Press DOWN switch. 2.0 V
Press loadtalk switch 3.0 V
Press ENTER switch. 4.0 V
Except for above. 5.0 V
7 V/Y
ACC power supply
 
8 R/Y Illumination signal ground
10  

shield
 
11 B
Pre amp sound signal front RH (+) Out
 
12 W Pre amp sound signal front RH (-) Out
13 V
Pre amp sound signal rear RH (+) Out
 
14 LG Pre amp sound signal rear RH (-) Out
15 L/B
Steering switch signal ground
 
16 GR/L Steering switch signal B
Press VOL DOWN switch. 0 V
Press VOL UP switch. 1.0 V
Press PHONE switch. 2.0 V
Press BACK switch. 3.0 V
Except for above. 5.0 V
19 Y/R
Battery power supply
 
20 B
Ground
 

W/C stands for Wire Color. It is for Altima 2012 and dependent on model and model year.

4 pin Nissan Head Unit USB

Pin
Number
W/C Signal
21 B USB GND
22 W USB D-
23 R V-Bus
24 G USB D+

32 pin Nissan Head Unit Additional

Pin
Number
W/C Signal
37 G/R Parking brake signal (+5V in when parking is on)
43 B Microphone VCC ground
44 R Microphone VCC
46 P CAN-L
51 R/L Illumination signal
52 G Ignition signal
53 P/B Reverse signal (+12V in when R position)
54 V/W Vehicle speed signal (8- pulse)
59 B/R Microphone signal
62 L CAN-H

40 pin Nissan Head Unit Video

Pin
Number
W/C Signal
66 Y Camera image signal
67 B Rear view camera ground
68 GR Camera ON signal (+6V out when selector in R position)
75 P AUX image signal ground
76 L AUX image signal
77   shield
32 pin Nissan Head Unit Additional connector layout
Разъем 32 pin Nissan Head Unit Additional
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Additional connector №3

40 pin Nissan Head Unit Video connector layout
Разъем 40 pin Nissan Head Unit Video

Additional connector №4

4 pin Nissan Head Unit USB connector layout
Разъем 4 pin Nissan Head Unit USB
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