GDI ± Troubleshooting
13A-28
Code No.54 Immobilizer system Probable cause
Range of check
D Ignition switch: ON
Set conditions
D Improper communication between the engine-ECU and immobilizer-ECU
D Radio interference of ID codes
D Incorrect ID code
D Malfunction of harness or connector
D Malfunction of immobilizer-ECU
D Malfunction of engine-ECU
NOTE
(1) If the ignition switches are close each other when starting the engine, radio interference may cause
this code to be displayed.
(2) This code may be displayed when registering the key ID code.
Replace the engine-ECU.
Check trouble symptom.
No
Check the following connector:
C-19, C±29, C-62, 1
Check the immobilizer system. (Refer to GROUP 54 ± Ignition
Switch and Immobilizer System.)
Check trouble symptom.
OK
Is a diagnosis code output from the immobilizer-ECU?
NG
Yes
Remove the extra ignition key.
OK
Replace
Check the harness wire between the engine-ECU and the
immobilizer-ECU.
NG
No
NG
Replace
OK
Yes
NG
Is there another ignition key near the ignition key that is inserted
in the ignition switch?
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