IMMOBILIZER ANTI-THEFT SYSTEM 9T–13
DAEWOO M–150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURES
IMMOBILIZER SYSTEM (FENIX 5MR)
The immobilizer anti-theft system requires diagnosis
when it is not possible to start the engine. If the no-start
condition occurs because of the immobilizer system, a
diagnostic trouble code (DTC) 1600, 1601 or
1602 should be set.
The immobilizer control unit monitors the detection and
the reading of the ignition key. The self-test capacity is
limited to those functions. Faults are communicated to a
scan tool during diagnosis, but they are not stored in the
immobilizer control unit’s memory.
Unauthorized use of a scan tool could be a method of
defeating the immobilizer anti-theft system, so certain
scan tool procedures require the use of a password. The
following functions are password protected:
D Coding of an additional key.
D Deleting all key codes.
D Deletion of the immobilizer identification (ID) code.
D Deletion of the electronic control module (ECM) ID
code.
The following functions do not require a password:
D Reading an ignition key to determine if the transpond-
er is working or if a key is authorized.
D Reading the immobilizer ID code to verify that it
matches the ECM ID code.
IMMOBILIZER SYSTEM (SIRIUS D3)
The immobilizer anti-theft system requires diagnosis
when it is not possible to start the engine. If the no-start
condition occurs because of the immobilizer system, a
diagnostic trouble code (P) 1628, 1629 should be set.
The immobilizer control unit monitors the detection and
the reading of the ignition key. The self-test capacity is
limited to those functions. Faults are communicated to a
scan tool during diagnosis, but they are not stored in the
immobilizer control unit’s memory.
Unauthorized use of a scan tool could be a method of
defeating the immobilizer anti-theft system, so certain
scan tool procedures require the use of a password. The
following functions are password protected:
D Coding of an additional key.
D Deleting all key codes.
The following functions do not require a password:
D Reading an ignition key to determine if the transpond-
er is working or if a key is authorized.
D Reading the immobilizer ID code to verify that it
matches the ECM ID code.
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