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DTC B1139: KOS authentification timeout
 
 
 
 
DIAGNOSTIC FUNCTION
If the necessary data cannot be received from KOS-ECU via CAN during the certification communication with KOS-ECU, OSS-ECU stores DTC B1139, and displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.
 
 
DTC SET CONDITION
Check Conditions
  • At KOS-ECU certification
Judgment Criterion
  • During the certification communication with KOS-ECU, the necessary data cannot be received from KOS-ECU via CAN.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the CAN bus line
  • Malfunction of KOS-ECU
  • Malfunction of OSS-ECU
 
 
DIAGNOSIS
1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line. [after turning the forced power supply output to "IG-ON" using the scan tool (M.U.T.-IIISE)]
2. KOS-ECU diagnostic trouble code check [after turning the forced power supply output to "IG-ON" using the scan tool (M.U.T.-IIISE)]
3. OSS-ECU diagnostic trouble code recheck