Audio-HVAC Subdisplay Unit Inputs and Outputs for 10P Connector

Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom
--- | --- | --- | --- | --- | ---
1 | BLK | GND SIG | ——— | 0 V | If open: Display visible, but very dim. If short to ground: Display unaffected.
2 | BLU | 5 V | ——— | 5 V | If open: All display segments show briefly at key on. If short to ground: All LCD segments do not work, display backlight on.
3 | BLK | GND | ——— | 0 V | ———
4 | BRN | RESET | Time set sync signal | 5 V | If open: Clock display will not set to navigation time (when time offset is applied or when ‘‘Reset'' touched in Setup ‘‘Clock Adjustment'' screen). If short to ground: All LCD segments do not work display backlight on.
5 | LT BLU | CLOCK | ——— | 0−0.04 V | If open: Randomly displays some characters, display backlight on. If short to ground: Randomly displayed characters, display backlight on.
6 | PNK | DATA | ——— | 0−0.04 V | If open: All LCD segments on, backlight on. If short to ground: All LCD segments on, backlight on.
7 | LT GRN | CE | ——— | 0 V | If open: All LCD segments on, backlight on. If short to ground: All LCD segments on, backlight on.
8 | GRY | SH SIG | Shield for terminal No. 4, 5, 6, 7 | 0 V | If open: No effect on display. If short to ground: No effect on display.
9 | RED | LCD BL− (LCD backlight−) | Power for LCD backlight− | 0−0.2 V | If open: Display function normal, but display is very dim. If short to ground: Display functions normally.
10 | GRN | LCD BL+ (LCD backlight+) | Power for LCD backlight+ | 9.2 V | If open: Display completely blank. If short to ground: Display completely blank.