B1901

DTC Troubleshooting: B1901, B1902

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 Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Check for DTCs with the HDS.

Is DTC B1901 or B1902 indicated?

YES -

Replace the immobilizer-keyless control unit Service and Repair.

NO -

Intermittent failure, the system is OK at this time.