Code No.U1539 Security alarm siren LIN checksum <Vehicles with security alarm sensor>




JUDGMENT CRITERIA




PROBABLE CAUSES



  • Faulty security alarm siren

DIAGNOSIS PROCEDURE


Check whether the diagnosis code is reset.



(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?