High Side Driver Supervison
Erase the fault memory and restart the ECU. If the fault does not exist anymore, wait until the compressor has pumped into the system and the pressure has reached the cut-out threshold. After the compressor has been switched off, the pressure sensor assembly check is carried out. Reduce the system pressure that the compressor starts pumping again. The safety circuitry check is carried out after the compressor has been switched on and the regeneration solenoid valve is closed. Check the fault memory for this error again. If the fault is present, replace the ECU. After replacement another execution of the safety circuitry check shall give proof that the safety circuitry is fully functional.
What you'll see
No driver-visible symptom recorded.
System reaction
No influence to APS2 functionality. Correct functioning of the safety concept related circuitry could not be verified. Safety risk is given due to this error.
Diagnostic depth
The safety circuitry which deactivates the high side drivers in case of a malfunction is checked after each startup to ensure that it is fully functional.
A run-time error occured while performing the safety circuitry check.