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 See: Powertrain
Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/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. Wait for at least 6 seconds.
4. 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: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Alarm Module/Service and Repair.?
NO -
Intermittent failure, the system is OK at this time.?
B1902
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 See: Powertrain
Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/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. Wait for at least 6 seconds.
4. 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: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Alarm Module/Service and Repair.?
NO -
Intermittent failure, the system is OK at this time.?
