Terminals and Reference Value for Display Control Unit

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT

Terminal No. (Wire color)		Item	Signal Input/output	Condition		Voltage	Example of symptom
+	-	Item	Signal Input/output	Ignition switch	Operation	Voltage	Example of symptom
1 (W)	Ground	Battery Power	Input	OFF	-	Battery voltage	System does not work properly.
2 (L/W)	Ground	Power Supply (Inverter)	Output	ON	-	Approx. 9V	Screen is not shown.
3 (B)	Ground	Ground	-	ON	-	Approx. 0V-	-
4 (L/R)	Ground	Power Supply (Signal)	Output	ON	-	Approx. 9V	Screen is not shown.
5 (P)	Ground	(Inverter) Ground	-	ON	-	Approx. 0V-	-
6 (G/W)	Ground	Reverse signal	Input	ON	Selector lever in R position	Battery voltage	Impossible to gain direction of vehicle.
6 (G/W)	Ground	Reverse signal	Input	ON	Selector lever not in R position	Approx. 0V	Impossible to gain direction of vehicle.
7 (P/L)	Ground	(Signal) Ground	-	ON	-	Approx. 0V	-
10 (V)	Ground	ACC signal	Input	ACC	-	Battery voltage	System does not work properly.
12 (G)	Ground	Ignition signal	Input	ON	-	Battery voltage	A/C operation is not possible. Vehicle information setting is not possible.
14 (R/L)	Ground	Illumination signal	Input	OFF	Lighting switch position 1st or 2nd	Battery voltage	Audio unit illumination does not come on when lighting switch is ON (position 1).
14 (R/L)	Ground	Illumination signal	Input	OFF	Lighting switch position OFF	Approx. 0V
16 (BR)	Ground	Vehicle speed signal (8-pulse)	Input	ON	When vehicle speed is approx. 40 km/h (25 MPH)	Courtesy of NISSAN MOTOR CO., U.S.A.	Value of vehicle speed information is not accurately displayed.
25 (L)	-	CAN-H	-	-	-	-	-
26 (P)	-	CAN-L	-	-	-	-	-
28 (V)	Ground	Communication signal (+)	Input/output	ON	-	Courtesy of NISSAN MOTOR CO., U.S.A.	System does not work properly.
29	-	Shield ground	-	-	-	-	-
30 (LG)	Ground	Communication signal (-)	Input/output	ON	-	Courtesy of NISSAN MOTOR CO., U.S.A.	System does not work properly.
32 (L)	Ground	Communication signal (+)	Input/output	ON	-	Courtesy of NISSAN MOTOR CO., U.S.A.	System does not work properly.
33	-	Shield ground	-	-	-	-	-
34 (P)	Ground	Communication signal (-)	Input/output	ON	-	Courtesy of NISSAN MOTOR CO., U.S.A.	System does not work properly.
36 (Y)	37	Display Communication signal (DCU-DSP)	Output	ON	Press the "TRIP" button.	Courtesy of NISSAN MOTOR CO., U.S.A.	Though a screen is displayed, it is impossible to adjust brightness.
37	-	Shield ground	-	-	-	-	-
38 (BR)	37	Display Communication signal (DSP-DCU)	Input	ON	Press the "TRIP" button.	Courtesy of NISSAN MOTOR CO., U.S.A.	Though a screen is displayed, it is impossible to adjust brightness.
39	-	Shield ground	-	-	-	-	-
40 (R)	Ground	Audio TX Communication signal	Output	ON	Operate audio volume.	Courtesy of NISSAN MOTOR CO., U.S.A.	Audio does not operate properly.
41	-	Shield ground	-	-	-	-	-
42 (V)	Ground	Audio RX communication signal	Input	ON	Operate audio volume.	Courtesy of NISSAN MOTOR CO., U.S.A.	Audio does not operate properly.
43 (W)	41	RGB synchronizing signal	Input	ON	Press the "MAP" button.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen is rolling.
44 (R/L)	45	RGB signal (R: red)	Input	ON	Select "Display Diagnosis (NAVI)" of CONFIRMATION/ADJUSTMENT function.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen looks bluish.
45	-	Shield ground	-	-	-	-	-
46 (R/W)	45	RGB signal (G: green)	Input	ON	Select "Display Diagnosis (NAVI)" of CONFIRMATION/ADJUSTMENT function.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen looks reddish.
47	-	Shield ground	-	-	-	-	-
48 (B)	45	RGB signal (B: blue)	Input	ON	Select "Display Diagnosis (NAVI)" of CONFIRMATION/ADJUSTMENT function.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen looks yellowish.
49	-	Shield ground	-	-	-	-	-
50 (R)	47	RGB signal (R: red)	Output	ON	Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen looks bluish.
51 (B)	49	RGB area (YS) signal	Output	ON	Press the "TRIP" button.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen is not shown.
52 (W)	47	RGB signal (G: green)	Output	ON	Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen looks reddish.
53 (W)	49	Vertical synchronizing (VP) signal	Output	ON	-	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen is not shown.
54 (B)	47	RGB signal (B: blue)	Output	ON	Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen looks yellowish.
55 (R)	49	Horizontal synchronizing (HP) signal	Input	ON	-	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen is not shown.
56 (G)	49	RGB synchronizing signal	Output	ON	Press the "TRIP" button.	Courtesy of NISSAN MOTOR CO., U.S.A.	RGB screen is rolling.