Audio-Navigation Unit Inputs and Outputs: Notes
AUDIO-NAVIGATION UNIT CONNECTOR A (24P)
| Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom |
|---|---|---|---|---|---|
| 1 | RED | ILLUMI- | Ground for illumination light | With full dash lights brightness, 0 V | If open: When brightness = Auto, night mode for the display is inoperative when lights on. If short to ground: No change to display. |
| 12 | BLK | MAIN GND | Ground for audio-navigation unit (G503) | 0 V | If open: No change to display. If short to ground: No change to display. |
| 13 | RED/BLK | ILLUMI + (Illumination positive) | Parking light on signal from dash and console lights | Light on = battery voltage;. Lights off = 0 V | If open: When brightness = Auto, night mode for the display is inoperative when lights on. If short to ground: Blows fuse No. 2 (15 A) in under-hood fuse/relay box. |
| 15 | BLU | VSP (Vehicle speed pulse) | Vehicle speed pulse signal from PCM | Pulses 0-5 V: Average 2.5 V, when moving | If open: No vehicle speed pulses. Diagnostic screen Car Status, VSP = 0. If short to ground: No vehicle speed pulses. Diagnostic screen Car Status, VSP = 0. |
| 24 | WHT/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. 9 (10 A) in the under-hood fuse/relay box. |