Using the B-CAN System Diagnosis Test Mode 1 (Use only if the HDS is unavailable)

Check for communication circuit problems using B-CAN System Diagnostic Test Mode 1 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) )
Check for DTCs
If there are DTCs stored, sort them, and then troubleshoot the DTCs in this order
1. -1 Battery voltage DTCs
2. -2 Internal error DTCs
3. -3 Loss of communication DTCs
  NOTE: If DTC U1280 is stored, troubleshoot DTC U1280 first (see DTC U1280: Communication bus Line Error (BUS-OFF) )
4. -4 Signal error DTCs
If no DTCs are retrieved, use B-CAN System Diagnostic Test Mode 2 to check all inputs related to the failure (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) )