Voltage supply for axles 1, 2, Dif rear axle, internal relay '1' does not open
- Check wiring of all actuators, that are connected to the first (main) supply circuit (short to UB ?) - Replace the ABS-ECU, if the fault is still active
What you'll see
No driver-visible symptom recorded.
System reaction
ABS function at all wheels is switched off ATC brake and engine control is switched off HSA is deactivated EBL is deactivated Drag Torque Control is deactivated
Diagnostic depth
Internal ECU failure: - A failure was detected on the internal relay '1'. There is a malfunction on relay '1'. The master and the safety controller are not able to deactivate the valve relay (SSW1). - Some components could not be controlled.
- faulty wiring of actuators, that are connected to the first (main) supply circuit - ABS-ECU defective