Code No.U0001: Bus Off
caution
If diagnosis code U0001 is set in the A/T-ECU, always diagnose the CAN main bus line.
Whenever the ECU is replaced, ensure that the communication circuit is normal.
DIAGNOSIS CODE SET CONDITIONS
When A/T-ECU ceases communication (bus-off), code No.U0001 is set.
PROBABLE CAUSES
Damaged wiring harness or connector
Malfunction of the A/T-ECU