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.