Code No. B1160 Key code not programmed
Code No. U1199 Chassis No. not programmed

caution

When diagnosis code No.B1160, or U1199 is set, be sure to diagnose the CAN bus line.
Before replacing ECU, ensure that the communication circuit is normal.

DIAGNOSTIC FUNCTION

KOS&OSS-ECU sets diagnosis code No.B1160 when the key code is not written.
KOS&OSS-ECU sets diagnosis code No.U1199 when no Chassis No. is recorded in it.

note When KOS&OSS-ECU is new, the diagnosis codes No.B1160 and No.U1199 are set simultaneously.

JUDGEMENT CRITERIA

Judgement Criterion

Chassis number or key code has the initial value (not written)

PROBABLE CAUSES

Malfunction of the CAN bus line
Chassis number not written
Key code not written
Malfunction of KOS&OSS-ECU

DIAGNOSIS PROCEDURE

1.M.U.T.-III CAN bus diagnosis
2.Chassis number registration