DTC B1901: Immobilizer Unit Internal Error (CPU error); DTC B1902: Immobilizer Unit Internal Error (EEPROM error)
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Check for DTCs with the HDS.
Are DTC B1901 and/or B1902 indicated?
YES -Faulty immobilizer-keyless control unit, replace the immobilizer-keyless control unit (see IMMOBILIZER-KEYLESS CONTROL UNIT REPLACEMENT ).
NO -Intermittent failure, the system is OK at this time.