Navigation Display Unit 28P Connector
TERMINAL VOLTAGE REFERENCE TABLE
| Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom | ||
|---|---|---|---|---|---|---|---|
| 1 | WHT | +B (Battery power source) | Continuous power source | Battery voltage | If open: Screen completely off (no backlight visible). If short to ground: Blows fuse No. 23 (10 A) in the under-hood fuse/relay box. |
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| 2 | PUR | ACC (Accessory) | Power source for accessory | Battery voltage at ACCESSORY (I) | If open: Display and buttons do not work. If short to ground: Blows fuse No. 35 (10 A) in the under-dash fuse/relay box. |
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| 3 | BLK | GA-NET BUS+ (GA-NET 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 do not work. |
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| 4 | BRN(1) | GA-NET BUS SH (GA-NET bus shield) | Shield for terminals No. 3, 17 | 0 V | If open: No change to display. If short to ground: No change to display. |
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| 5 | BLK | GA-NET ECU BUS+ (Display bus positive) | Data bus+ GA-Net | 0-5 V pulses average 2.5 V depends on bus traffic | If open: Navigation buttons do not work. If short to ground: Navigation buttons do not work. |
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| 6 | RED | SECURITY 1 | Security signal from MICU | 0 V | If open: The security system will set, and will not trip when screen is removed. If short to ground: The security system will set, and will not trip when screen is removed. |
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| 8 | WHT | R SIG (Red signal) | Green color signal | 0.7 VAC in RGB color diagnostic mode | If open: Red color missing (see
). If short to ground: Red color missing (see ). |
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| 9 | RED | G SIG (Green signal) | Red color signal | 0.7 VAC in RGB color diagnostic mode | If open: Green color missing (see
). If short to ground: Green color missing (see ). |
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| 10 | BLK | GND (Ground) | Ground for display unit (G403) | 0 V | If open: No change to display. If short to ground: No change to display. |
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| 11 | GRY(1) | CAMERA SH (Shield camera) | Shield for terminals No. 12, 13, 26, 27 | 0 V | If open: No change to rearview camera image. If short to ground: No change to rearview camera image. |
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| 12 | GRN | CAMERA GND (Ground camera) | Ground for camera signal | 0 V | If open: No change to rearview camera image. If short to ground: No change to rearview camera image. |
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| 13 | BLU | CAMERA (VCC supply) | Power source for rearview camera | 8V | If open: When put into reverse, the navigation screen goes black (backlight still operation) If short to ground: When put into reverse, the navigation screen goes black (backlight still operative). |
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| 15 | PNK | ILL+ (Illumination positive) | Parking light on signal from dash and console lights | Battery voltage if lights on: otherwise 0 V | If open: When brightness=Auto, night mode for the display is inoperative when lights on. If short to ground: brightness=Auto, night mode for the display is inoperative when lights on. |
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| 16 | ORN | BACK LT-(Back light or reverse signal) | Reverse signal of select lever from MICU (Multiplex Integrated Control Unit) | In reverse, battery voltage: Otherwise 0 V | If open: Navigation never sees reverse. Diagnostic screen Car Status, Back=0. If short to ground: Check the backup light circuit. |
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| 17 | WHT | GA BUS-(GA-NET bus negative) | GA-NET data bus- | 0-5 V pulses average 2.5 V depends on bus traffic | If open: Navigation buttons do not work. If short to ground: Hard buttons work OK. |
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| 18 | BRN(1) | GA-NET ECU BUS SH (Display bus shield) | Shield for display bus terminals No. 5, 19 | 0 V | If open: Red color missing (see
). If short to ground: Red color missing (see ). |
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| 19 | WHT | GA-NET ECU BUS-(ECU bus negative) | GA-NET data bus- | 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. |
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| 20 | PNK | SECURITY- | Security signal from | 0 V | If open: The security system will set, and will not trip when screen is removed. If short to ground: The security system will set, and will not trip when screen is removed. |
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| 21 | 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. |
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| 22 | YEL | B SIG (Blue signal) | Blue color signal | 0-1 VAC | If open: Blue color missing (see
). If short to ground: Blue color missing (see ). |
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| 23 | GRN | C SIG (Composite signal) | Composite video (vertical/horizontal) synchronizing signal | 0.3 V AC | If open: Picture rolls horizontally, colors still visible. If short to ground: Picture rolls horizontally, colors still visible. |
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| 24 | BRN(1) | SIG SH (RGB/C signal Shield) | Shield for terminals No. 8, 9, 21, 22, 23 | 0 V | If open: No change to display. If short to ground: No change to display. |
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| 26 | WHT | RC VCC (Video camera) | Video signal from rearview camera | 0.3V | If open: No change to rearview camera image. If short to ground: No change to rearview camera image. |
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| 27 | RED | RC GND (Ground camera) | Ground for rearview camera signal | 0 V | If open: No change to rearview camera image. If short to ground: No change to rearview camera image. |
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| 28 | YEL | CAMERA ADPT (Adaptive camera) | Control signal for rearview camera | 0 V | If open: No change to rearview camera image. If short to ground: No change to rearview camera image. |
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