Terminals and Reference Value for Display Control Unit
WARNING: This page is about a different car, the 2008 Nissan Quest. 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 (Approx.) | Example of symptom | ||
|---|---|---|---|---|---|---|---|
| + | - | Ignition switch | Operation | ||||
| 1 (Y/R) | Ground | Battery Power | Input | OFF | - | Battery voltage | System does not work properly. |
| 2 (L/W) | Ground | Power Supply (Inverter) | Output | ON | - | 9V | Screen is not shown. |
| 3 (B) | Ground | Ground | - | ON | - | 0V | - |
| 4 (L/R) | Ground | Power Supply (Signal) | Output | ON | - | 9V | Screen is not shown. |
| 5 (P/B) | Ground | (Inverter) Ground | - | ON | - | 0V | - |
| 7 (LG) | Ground | (Signal) Ground | - | ON | - | 0V | - |
| 10 (V) | Ground | ACC signal | Input | ACC | - | Battery voltage | System does not work properly. |
| 12 (G) | Ground | Ignition signal | Input | ON | - | Battery voltage | Vehicle information setting is not possible. |
| 14 (R/L) | Ground | Illumination signal | Input | OFF | Lighting switch position 1st or 2nd | Battery voltage | Display unit does not change when lighting switch is turned to 1st position. |
| Lighting switch position OFF | 0V | ||||||
| 16 (P/L) | Ground | Vehicle speed signal (8-pulse) | Input | ON | When vehicle speed is approx. 40 km/h (25 MPH) | 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 | - | System does not work properly. | |
| 29 | - | Shield ground | - | - | - | - | - |
| 30 (LG) | Ground | Communication signal (-) | Input/output | ON | - | System does not work properly. | |
| 36 (B/W) | 37 | Display Communication signal (DCU-DSP) | Output | ON | Press the "TRIP" button. | Though a screen is displayed, it is impossible to adjust brightness. | |
| 37 | - | Shield ground | - | - | - | - | - |
| 38 (L) | 37 | Display Communication signal (DSP-DCU) | Input | ON | Press the "TRIP" button. | Though a screen is displayed, it is impossible to adjust brightness. | |
| 39 | - | Shield ground | - | - | - | - | - |
| 40 (B/R) | Ground | Audio TX Communication signal | Output | ON | Operate audio volume. | Audio does not operate properly. | |
| 42 (BR) | Ground | Audio RX communication signal | Input | ON | Operate audio volume. | Audio does not operate properly. | |
| 47 | - | Shield ground | - | - | - | - | - |
| 49 | - | Shield ground | - | - | - | - | - |
| 50 (R/L) | 47 | RGB signal (R: red) | Output | ON | Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function. | Screen looks bluish. | |
| 51 (B) | 49 | RGB area (YS) signal | Output | ON | Press the "TRIP" button. | RGB screen is not shown. | |
| 52 (R/W) | 47 | RGB signal (G: green) | Output | ON | Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function. | Screen looks reddish. | |
| 53 (W) | 49 | Vertical synchronizing (VP) signal | Input | ON | - | Operating screen for audio and A/C is not displayed. | |
| 54 (B) | 47 | RGB signal (B: blue) | Output | ON | Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function. | Screen looks yellowish. | |
| 55 (R) | 49 | Horizontal synchronizing (HP) signal | Input | ON | - | Operating screen for audio and A/C is not displayed. | |
| 56 (G) | 49 | RGB synchronizing signal | Output | ON | Press the "TRIP" button. | Screen is rolling. | |