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TROUBLESHOOTING <KOS-ECU> KEYLESS OPERATION SYSTEM (KOS) 42B-25 Code No.B2416 ECU internal error DIAGNOSIS FUNCTION KOS-ECU sets diagnosis code No. B2416 when it JUDGMENT CRITERIA KOS-ECU determines that the abnormality is PROBABLE CAUSES Malfunction of KOS-ECU DIAGNOSIS PROCEDURE 1. Diagnosis code recheck. Code No.B2417 OSS authentification error CAUTION When replacing the ECU, always check that the DIAGNOSIS FUNCTION When abnormal data is received from OSS-ECU as JUDGEMENT CRITERIA When abnormal data is received from OSS-ECU, PROBABLE CAUSES • Malfunction of OSS-ECU (OSS-ECUs have been interchanged between two vehicles.) • Malfunction of KOS-ECU DIAGNOSIS PROCEDURE 1. M.U.T.-III other system diagnosis code. 2. M.U.T.-III diagnosis code. 3. Check whether the diagnosis code is reset. Code No.B2418 OSS authentification timeout CAUTION • If the diagnosis code No. B2418 is set, diag- nose the CAN bus lines. • When replacing the ECU, always check that the communication circuit is normal. DIAGNOSIS FUNCTION KOS-ECU checks whether the OSS-ECU data is JUDGEMENT CRITERIA If the reception of data from OSS-ECU received via PROBABLE CAUSES • Malfunction of CAN bus line • Malfunction of OSS-ECU • Malfunction of KOS-ECU DIAGNOSIS PROCEDURE 1. M.U.T.-III CAN bus diagnostics 2. M.U.T.-III other system diagnosis code 3. Check whether the diagnosis code is reset. |