Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Audio-Navigation Unit Inputs and Outputs: Overview
Audio-Navigation Unit Connector A (24P)
| Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom |
|---|---|---|---|---|---|
| 1 | WHT | ILL(-) | 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) | Ground for audio-navigation unit | 0 V | If open: No change to display. If short to ground: No change to display. |
| 13 | GRY | ILL (+) (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. 29 (10 A) in under-dash 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 Navi = 0. If short to ground: No vehicle speed pulses. Diagnostic screen Car Status, VSP Navi = 0. |
| 24 | PNK | +B BACK UP (+B power source) | Continuous power source | Battery voltage | If open: Screen completely off (no backlight visible). If short to ground: Blows fuse No. 1 (15 A) in the under-dash fuse/relay box. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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