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

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Check for communication circuit problems using B-CAN System Diagnostic Test Mode 1 (see ).
Check for DTCs.
If multiple DTCs are stored, sort them, and then troubleshoot the DTCs in this order.
1. Battery voltage DTCs
2. Internal error DTCs
3. Loss of communication DTCs
  NOTE: If DTC U1280 is stored, troubleshoot DTC U1280 (see DTC U1280: COMMUNICATION BUS LINE ERROR (BUS-OFF) ) first.
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 ).