STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
(1) Turn the power supply mode of the engine switch to OFF.
(2) Turn the power supply mode of the engine switch to ON.
(3) Check if the DTC is set.
(4) Turn the power supply mode of the engine switch to OFF.
Is the DTC C1901 set?
Go to Step 3. The procedure is complete.