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.
RTI Control Module (To Audio Unit)
Before taking any readings, see Connecting the breakout box and checking the ground terminal .
The RTI control module terminals E1-E8 correspond to terminal #16-#23 on the breakout box.
| Control module terminal | Breakout box terminal | Signal Type | Ignition On | Other |
|---|---|---|---|---|
| E1 | #16 | Clock signal to audio unit | Digital signal | Melbus protocol |
| E2 | #17 | Signal ground, sound | Ulow | - |
| E3 | #18 | 15 supply | Ubat | - |
| E4 | #19 | Data signal to audio unit | Digital signal | Melbus protocol |
| E5 | #20 | Busy signal to audio unit | Digital signal | Melbus protocol |
| E6 | #21 | Left audio channel | Alternating current on sound to loudspeakers | 150 mV rms +/- 38 mV (1 kHz 30% mod) |
| E7 | #22 | Right audio channel | Alternating current on sound to loudspeakers | 150 mV rms +/- 38 mV (1 kHz 30% mod) |
| E8 | #23 | Voice guide channel | Alternating current on sound to loudspeakers (for voice guidance) | 150 mV rms +/- 38 mV (1 kHz 30% mod) |
| H | Screen ground, cable to audio unit | Ulow | - | - |
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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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