This parameter contains the status of the precharge logic circuit inside the BMS.
The following states are possible:
0 = Precharge waiting for activation (OFF)
1 = Stage 1: Check HVPOS Contact
2 = Stage 2: Delay during HVPOS Check
3 = Stage 3: Close HVNEG Contact
4 = Stage 4: Precharge Relay On
5 = Stage 5: Precharge Delay Start
6 = Stage 6: Precharge Delay End
7 = Stage 7: Close HVPOS Contact
8 = Stage 8: Precharge Relay Off
9 = Stage 9: Precharge Complete / Success
10 = ERROR: Precharge FAULT / UNSUCCESSFUL
The Precharge circuit state may jump to stage 10 at any time to signify an aborted precharge sequence. The circuit will remain at state 0 until the precharge sequence is started.