DTC Troubleshooting: B1901
DTC B1901: Immobilizer Unit Internal error (CPU error)
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

DTC Description
DTC
B1901 Immobilizer Unit Internal error (CPU error)
  

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?3.
Check for DTCs with the HDS.
DTC Description
DTC
B1901 Immobilizer Unit Internal error (CPU error)
  

Is DTC B1901 indicated?

     
YES
     
     
     
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?