Immobilizer Control System: 10C-14
DTC P1625: Immobilizer Antenna Error
S7RS0BA304015
Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Turn ignition switch to ON position.
2) Check DTC in ECM.
Troubleshooting
DTC P1636: Immobilizer Information Registration Failure
S7RS0BA304016
DTC Detecting Condition and Trouble Area
Troubleshooting
3 Registration of unregistered ignition key with ECM
1) Register unregistered ignition key with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed?
Unregistered ignition
key.
Go to Step 4.
4 Registration of the spare ignition key
1) Register the spare ignition key referring to “Registration
of the Ignition Key”.
Was registration of spare ignition key completed?
Replace ignition key
which cannot be
registered.
Substitute a known-
good ECM and recheck.
Step Action Yes No
Detecting Condition Trouble Area
ICM • ICM
•ECM
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC confirmation
1) Clear DTC(s) referring to “Diagnostic Trouble Code
(DTC) Clearance”.
2) Turn the ignition switch to OFF position.
3) Check ECM for DTC referring to “Diagnostic Trouble
Code (DTC) Check”.
Is DTC P1625 still detected?
Replace ICM and
recheck DTC. If DTC
P1625 is still detected,
substitute a known-
good ECM and recheck.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
Detecting Condition Trouble Area
The registration of the immobilizer control system
information in ECM is failed.
• CAN communication wire circuits
•BCM
•ECM
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC check of ECM
1) Check ECM for DTC referring to “DTC Check in Section
1A”.
Is DTC P1674, P1675, P1678 and/or P1685 detected?
Go to applicable DTC
diag. flow.
Go to Step 3.
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