Voltage supply clamp 30B - open circuit
System Layout with two external Voltage Supply Pins (Clamp 30 and clamp 15): - Replace ABS ECU System Layout with three external Voltage Supply Pins (Clamp 30a and clamp 30b and clamp 15): - Check wiring of external voltage supply (second circuit) - Replace ABS ECU
What you'll see
No driver-visible symptom recorded.
System reaction
ABS function at all wheels is switched off ATC brake control is switched off ATC engine control is still available HSA is deactivated EBL is deactivated Drag Torque Control is not deactivated
Diagnostic depth
An interruption of the voltage supply line for axle 3, Dif front axle and trailer modulator (clamp 30B) line was detected. A low voltage (open circuit) was measured The open-circuit voltage level is 3V.
- faulty wiring of external voltage supply (second circuit) - ABS ECU defective