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.
Signal specification
General
All the values given below are between the respective terminal in column 1 and terminal #A6 in column 1 (power ground), if this is not the case, it is indicated within brackets.
It is important to check ground terminals before taking readings.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage (V) | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | t = | Time in seconds |
| PWM = | Pulse width modulated signal as a % |
| Control module terminal | Signal type | Ignition off Active/Inactive | Ignition on Active/Inactive | Other |
|---|---|---|---|---|
| #A1 | 15-feed | U low /Ulow | Uhigh /Uhigh | |
| #A2 | - | - | - | |
| #A3 | Communication CAN_L high speed network | During communication the voltage is 1.5-2.5 V | ||
| #A4 | Communication CAN_H high speed network | During communication the voltage is 2.0-3.5 V | ||
| #A5 | Left headlamp control unit (LHCU), LIN communication | During communication the voltage is 0 V - Ubat | ||
| #A6 | Power ground | U low /Ulow | U low /Ulow | |
| #A7 | Right headlamp control unit (RHCU), LIN communication | During communication the voltage is 0 V - Ubat | ||
| #A8 | - | - | - | |
| #A9 | - | - | - | |
| #A10 | - | - | - | |
| #A11 | - | - | - | |
| #A12 | - | - |
- | |
| #A13 | - | - | - | |
| #A14 | - | - | - | |
| #A15 | - | - | - | |
| #A16 | - | - | - | |
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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.