Navigation Display Unit Inputs and Outputs
Navigation Display Unit 28P Connector
NAVIGATION DISPLAY UNIT 28P CONNECTOR TERMINALS REFERENCE CHART
| Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom | ||
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| 1 | WHT | +B (+B power source) | Continuous power source | Battery voltage | If open Screen completely off (no backlight visible) If short to ground Blows fuse No 15(10A) in the under-hood fuse/relay box |
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| 2 | PUR | 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 18 (7 5 A) in the driver's under-dash fuse/relay box |
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| 3 | RED | GA-NET BUS+ (GA-NET bus positive) | Data bus+ GA-Net | 0-5 V pulses average 2 5V 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 | GRY(1) | GA-NET BUS SH (GA-NET) | Shield for No 3,17 terminals | 0V | If open No change to display If short to ground No change to display |
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| 5 | GRN | GA-NET ECU BUS+ (GA-NET) (Display bus positive) | Data bus+ GA-Net | 0-5 V pulses average 2 5V 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 | GRN | SECURITY+ | Security signal to rear screen | 0V | 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 trio when screen is removed |
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| 8 | WHT | R SIG 1 (Red signal) | Red color signal | 07 V AC | If open Red color missing (see RGB Color diagnostic) If short to ground Red color missing (see RGB Color diagnostic) |
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| 9 | RED | G SIG 1 (Green signal) | Green color signal | 07 V AC | If open Green color missing (see RGB Color diagnostic) If short to ground Green color missing (see RGB Color diagnostic) |
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| 10 | BLK | GND (Ground) | Ground for display unit | 0V | If open No change to display If short to around No change to display |
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| 11 | GRY(1) | CAMERA SH (Shield camera) | Shield for terminals No 12, 13,26,27 | 0V | If open No change to rearview camera image If short to ground No change to rearview camera image |
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| 12 | RED | RC 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*1 | WHT | 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 | GRY | 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 Blows fuse No 6 (7 5 A) in the passenger's under-dash fuse/relay box |
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| 17 | GRN | GA BUS-(GA-NET) | Data bus-GA-Net | 0-5 V pulses average 2 5V depends on bus traffic | If open Navigation buttons do not work If short to ground Hard buttons work OK |
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| 18 | GRY(1) | SH GA-NET ECU BUS (Shield ECU bus) | Shield for display bus terminals No 5,19 | 0V | If open No change to display If short to ground No change to display |
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| 19 | RED | GA-NET ECU BUS-(Display bus negative) | Data bus-GA-Net | 0-5 V pulses average 2 5V 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 | BRN | SECURITY- | Security signal from CD changer | 0V | 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 | BLU | GND SIG 1 (Ground signal) | Ground for color signal | 0V | If open No change to display If short to ground No change to display |
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| 22 | YEL | B SIG 1 (Blue signal) | Blue color signal | 0-1 V AC | If open Blue color missing (see RGB Color diagnostic) If short to ground Blue color missing (see RGB Color diagnostic) |
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| 23 | BRN | C SIG 1 (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 | GRY(1) | SH SIG 1 (Shield signal) | Shield for terminals No 8,9,21,22,23 | 0V | If open No change to display If short to ground No change to display |
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| 26 | GRN | RC VCC (Video camera) | Video signal for rearview camera | 03V | If open No change to rearview camera image If short to ground No change to rearview camera image |
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| 27 | BLK | CAMERA GND (Ground camera) | Ground for camera signal | 0V | If open No change to rearview camera image If short to ground No change to rearview camera image |
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| 28 | BRN | CAMERA ADPT (Adaptive camera) | Control signal for rearview camera | 0V | If open No change to rearview camera image If short to ground No change to rearview camera image |
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The color of the insulating tube, typically black or dark gray, may not match the color of the wire shown on the circuit diagram |
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