CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System
54-14
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No. 11 Transponder communication system Probable cause
D The ID code of the transponder is not sent to the immobilizer-ECU immediately
after the ignition switch is turned to the ON position.
D When starting the engine, one ignition key’s ID code interferes with another ignition
key’s code.
D Radio interference of ID codes
D Malfunction of the transponder
D Malfunction of the ignition key ring antenna
D Malfunction of harness or connector
D Malfunction of the immobilizer-ECU
No
OK
Check the following connectors.
B-100, B-101
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between immo-
bilizer-ECU and key ring antenna.
NG
Repair
OK
Replace the immobilizer-ECU.
NG
Diagnosis codes check
Code No. 12 occurs
To INSPECTION PROCEDURE FOR
DIAGNOSIS CODE No. 12
(Refer to P.54-14.)
Code No. 11 occurs
Check the continuity of the ignition key
ring antenna. (Refer to P.54-20.)
NG
Replace
Is there another ignition key near the
ignition key that is inserted in the ignition
switch?
Yes
Remove the extra ignition key.
Check trouble symptoms.
Does the engine start using the spare
ignition key which has had the ID code
registered?
OK
Replace the ignition key that does not
work.
Re-register the ID code.
(Refer to P.54-21.)
NG
Code No. 12 ID code are not the same or are not registered Probable cause
The ID code which is sent from the transponder is not the same as the ID code
which is registered in the immobilizer-ECU.
D The ID code in the ignition key being used has not
been properly registered.
D Malfunction of the immobilizer-ECU
Re-register the ID code.
(Refer to P.54-21.)
Check trouble symptoms.
NG
Replace the immobilizer-ECU.
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