Signal specification
Connector A
All the values given below are between the relevant terminal stated in column 1 and terminal #A2 (ground). This applies unless otherwise indicated in brackets.
NOTE:
It is important to connect the breakout box and check ground terminals before reading off.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | battery voltage | F = | frequency in Hertz (Hz) |
| Ulow = | voltage approximately 0 V | % duty = | duty cycle (pulse ratio) as a percentage (%) |
| t = | time in milliseconds (ms) | - | - |
| Terminal in the breakout box | Control module terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| #1 | #1 | - | - | - |
| #2 | #2 | Ground | U low | - |
| #3 | #3 | Control module communication cable CAN_L | During communication the voltage is 1.5-2.5 V | - |
| #4 | #4 | Control module communication cable CAN_H | During communication the voltage is 2.0-3.5 V | - |
| #5 | #5 | - | - | - |
| #6 | #6 | - | - | - |
| #7 | #7 | Communication cable LIN central electronic module (CEM) | During communication the voltage is 0 V - U bat | - |
| #8 | #8 | Power supply | U bat | 15i-supply, from the ignition switch |
| #9 | #9 | Windshield wipers | - | - |
| #10 | #10 | Horn | Ulow | Short-circuit to ground when activated |