DLC3 (Data Link Connector 3)
Check the DLC3.
AUXILIARY BATTERY VOLTAGE
If voltage is below 11 V, recharge or replace the auxiliary battery.
Note
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.