Block 1 | Block 2 | Blocks 3 and 4 |
Blink Code | Configuration | Blink Code | Configuration | Blink Code | Fault |
2 | ABS only | 2 | 24V, without select low at front axle | 1 | No faults |
5 | ABS with ASR brake activation and ASR engine control | 3 | 12V, without select low at front axle | 2 | Internal ECU fault |
 | | 4 | 24V, with select low at front axle | 3 | Wheel speed sensor front air gap too big |
| | 5 | 12V, with select low at front axle | 4 | Wheel speed sensor rear air gap too big |
| | | | 6 | Wheel speed sensor front open circuit |
| | | | 7 | Wheel speed sensor rear open circuit |
| | | | 9 | Low voltage or valve relay not operational |
| | | | 10 | Pressure control valve: Front valve faulty |
| | | | 11 | Pressure control valve: Rear valve faulty |
| | | | 13 | Valve relay burnt, sticking |
| | | | 14 | Path: ASR-Valve brake activation |
| | | | 15 | Path: Control lever evaluator |
| | | | 16 | Path: C3 / B7: Signal (Tachograph) |
| | | | 17 | Path: Pin W: Signal (Generator). Fault during configuration or during operation |
| | | | 18 | Difference in wheel diameter |
| | | | 19 | Retarder relay (fault only given out in Block 4 - diagonal 2) |
| | | | 20 | Clutch switch short circuit |
