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EF–6
CAUTION FOR IMMOBILIZER-EQUIPPED
VEHICLE
1. The immobilizer system is formed by communication be-
tween the Immobilizer ECU and the EFI ECU by means of
the rolling code. The rolling code will be automatically re-
tained both in the immobilizer ECU and in the EFI ECU
when the engine is started once with the key of the immo-
bilizer system. The engine will not start if the rolling code
in the immobilizer ECU and EFI ECU are not identical.
Therefore, the engine will not start when using the EFI
ECU which was mounted before on another vehicle with
the immobilizer system without resetting the rolling code.
2. Even when the EFI ECU has been replaced according to
the check results of the trouble shooting and the relevant
malfunction has been remedied, be sure to reinstall the
old EFI ECU so as to confirm that the malfunction was ob-
viously caused by the faulty EFI ECU.
NOTE:
•
Be sure to reset the rolling code in the EFI ECU and
Immobilizer ECU using a diagnosis tester (DS-21).
Furthermore, registration of the ignition key should be
performed when installing the EFI ECU which was
mounted on the vehicle equipped with the immobilizer
system to another vehicles.
•
Refer to the BE section of the service manual.
3. However, the engine can start when using the EFI ECU
which was mounted on a vehicle without the immobilizer
system. However, after completion of the test where this
EFI ECU was used for the vehicle with the immobilizer sys-
tem, if this EFI ECU is returned to the original vehicle, the
engine of the original vehicle will not start any more.
JEF00013-00102
JEF00014-00103
JEF00015-00104
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