Voltage supply clamp 30A, low voltage
This DTC can also be detected during engine start. Therefore this DTC is no longer stored in failure memory. If this DTC is detected although not engine start was active, please check the following items: - Check wiring of external voltage supply (first 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 undervoltage at the supply line for axles 1, 2 and Dif rear axle (clamp 30A) was detected. The undervoltage detection has three ranges: range a) 3V . . . U1 range b) U1 . . . U2 range c) U2 . . . U3 The undervoltage levels for a 24V system are: U1 = 16V U2 = 18V U3 = 18V
- wiring of external voltage supply faulty (first circuit) - ABS ECU defective