Display Unit Inputs and Outputs for 20P Connector
DISPLAY UNIT INPUTS AND OUTPUTS FOR 20P CONNECTOR
| Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom |
|---|---|---|---|---|---|
| 1 | RED | +B (+B power source) | Continuous power source | Battery voltage | If open: Screen completely off (no backlight visible). If short to ground: Blows fuse No. 7 (10 A) in the under-dash fuse/relay box. |
| 2 | YEL | ACC (Accessory) | Power source for accessory | Battery voltage at ACC (I) | If open: Display and buttons do not work. If short to ground: Blows fuse No. 32 (7.5 A) in the under-dash fuse/relay box. |
| 3 | GRN | AUD BUS (+) (Audio bus positive) | Data bus (+) GA-Net | 0-5 V pulses average 2.5 V depends on bus traffic | If open: Navigation buttons and touch screen do not work. If short to ground: Navigation buttons and touch screen do not work. |
| 4 | GRY | SH AUD BUS (Shield audio bus) | Shield for audio bus terminal No. 3, 13 | 0 V | If open: No change to display. If short to ground: No change to display |
| 5 | BLU | DISP BUS (+) (Display bus positive) | Data bus (+) GA-Net | 0-5 V pulses average 2.5 V depends on bus traffic | If open: Navigation buttons and touch screen do not work. If short to ground: Navigation buttons and touch screen do not work. |
| 8 | WHT | R SIG (Red signal) | Red color signal | 0.2 VAC average in RGB color diagnostic mode | If open: Red color missing (see "RGB COLOR " diagnostic). If short to ground: Red color missing (see "RGB COLOR " diagnostic). |
| 9 | RED | G SIG (Green signal) | Green color signal | 0.2 V AC average in RGB color diagnostic mode | If open: Green color missing (see "RGB COLOR " diagnostic). If short to ground: Green color missing (see "RGB COLOR " diagnostic). |
| 10 | BLK | GND (Ground) | Ground for display unit | 0 V | If open: No change to display. If short to ground: No change to display. |
| 13 | RED | AUD BUS (-) (Audio bus negative) | Data bus (-) GA-Net | 0-5 V pulses average 2.5 V depends on bus traffic | If open: Navigation buttons and touch screen do not work. If short to ground: Hard and touch buttons work OK. |
| 14 | GRY | SH DISP BUS (Shield display bus) | Shield for display bus terminal No. 5, 15 | 0 V | If open: No change to display. If short to ground: No change to display. |
| 15 | PNK | DISP BUS (-) (Display bus negative) | Data bus (-) GA-Net | 0-5 V pulses average 2.5 V depends on bus traffic | If open: Navigation buttons and touch screen do not work. If short to ground: Hard and touch buttons work OK. |
| 17 | BLK | GND SIG (Ground signal) | Ground for color signal | 0 V | If open: No change to display. If short to ground: No change to display. |
| 18 | YEL | B SIG (Blue signal) | Blue color signal | 0.2 V AC average in RGB color diagnostic mode | If open: Blue color missing (see "RGB COLOR " diagnostic). If short to ground: Blue color missing (see "RGB COLOR " diagnostic). |
| 19 | GRN | C SIG (Composite signal) | Composite video (vertical/horizontal) synchronizing signal | 0.2 VAC average in RGB color diagnostic mode | If open: Picture rolls horizontally, colors still visible. If short to ground: Picture rolls horizontally, colors still visible. |
| 20 | GRY | SH SIG (Shield signal) | Shield for terminal No. 8, 9, 17, 18, 19 | 0 V | If open: No change to display. If short to ground: No change to display. |