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 terminals stated in column 1 and terminal #C1:8 in column 2 (power ground).
It is important to connect the breakout box and check the ground connections before starting to measure.
| 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 % |
| Breakout box terminal | Control module terminal | Signal type | Ignition off | Ignition on (position II) | Miscellaneous |
|---|---|---|---|---|---|
| #1 | #C1:1 | Power supply, parking assistance module (PAM), 15-supply | U = Ulow | U = Ubat | Via relay 15-feed, electrical distribution box luggage compartment. |
| #2 | #C1:2 | - | - | - | - |
| #3 | #C1:3 | - | - | - | - |
| #4 | #C1:4 | - | - | - | - |
| #5 | #C1:5 | - | - | - | - |
| #6 | #C1:6 | - | - | - | - |
| #7 | #C1:7 | CAN L | U = Ulow | During communication U = 1.0 - 2.5 V. | - |
| #8 | #C1:8 | Ground | U = Ulow | U = Ulow | - |
| #9 | #C1:9 | - | - | - | - |
| #10 | #C1:10 | - | - | - | - |
| #11 | #C1:11 | - | - | - | - |
| #12 | #C1:12 | - | - | - | - |
| #13 | #C1:13 | - | - | - | - |
| #14 | #C1:14 | CAN H | U = Ulow | During communication U = 2.5 - 4.0 V. | - |
| #15 | #C1:15 | - | - | - | - |
| #16 | #C1:16 | - | - | - | - |
| Breakout box terminal | Control module terminal | Signal type | Ignition off | Ignition on (position II) | Miscellaneous |
|---|---|---|---|---|---|
| #21 | #C2:1 | Signal ground, front parking sensor | U = Ulow | U = Ulow | - |
| #22 | #C2:2 | Voltage supply, front parking sensors | U = Ulow | U = Ubat | - |
| #23 | #C2:3 | - | - | - | - |
| #24 | #C2:4 | - | - | - | - |
| #25 | #C2:5 | Signal, parking sensor outer left front | U = Ulow | U = 8.8 -16.0V | - |
| #26 | #C2:6 | Signal, parking sensor inner left front | U = Ulow | U = 8.8 -16.0V | - |
| #27 | #C2:7 | Signal, parking sensor inner right front | U = Ulow | U = 8.8 -16.0V | - |
| #28 | #C2:8 | Signal, parking sensor outer right front | U = Ulow | U = 8.8 -16.0V | - |
| #29 | #C2:9 | - | - | - | - |
| #30 | #C2:10 | - | - | - | - |
| #31 | #C2:11 | - | - | - | - |
| #32 | #C2:12 | - | - | - | - |
| Breakout box terminal | Control module terminal | Signal type | Ignition off | Ignition on (position II) | Miscellaneous |
|---|---|---|---|---|---|
| #41 | #C3:1 | - | - | - | - |
| #42 | #C3:2 | Signal, parking sensor inner right rear | U = Ulow | U = 8.8 -16.0V | - |
| #43 | #C3:3 | Signal, parking sensor inner left rear | U = Ulow | U = 8.8 -16.0V | - |
| #44 | #C3:4 | Signal, parking sensor outer right rear | U = Ulow | U = 8.8 -16.0V | - |
| #45 | #C3:5 | Signal, parking sensor outer left rear | U = Ulow | U = 8.8 -16.0V | - |
| #46 | #C3:6 | - | - | - | - |
| #47 | #C3:7 | - | - | - | - |
| #48 | #C3:8 | Signal ground, rear parking sensors | U = Ulow | U = Ulow | - |
| #49 | #C3:9 | - | - | - | - |
| #50 | #C3:10 | - | - | - | - |
| #51 | #C3:11 | Voltage supply, rear parking sensors | U = Ulow | U = Ubat | - |
| #52 | #C3:12 | - | - | - | - |
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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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