Immobilizer System On Vehicles With Advanced Keyless System - Mazda 6 Facelift 2005 Training Manual

Accessories

Immobilizer System on Vehicles with Advanced Keyless System

•
The immobilizer system is a vehicle theft prevention device that only allows keys that
have previously been programmed to the vehicle to start the engine. It functions to
prevent theft by means such as a forged key or hotwiring.
•
It consists of the key (with built-in transponder), coil antenna, PCM, and keyless control
module.
•
The immobilizer system activates automatically when the start knob is turned to the
LOCK or ACC position. (The security light in the instrument cluster flashes while the
immobilizer system is activated.)
•
When the start knob is pressed (push switch ON) and turned to the ON position with a
previously programmed auxiliary key, the immobilizer system deactivation operation
begins automatically. The engine is allowed to start only after the deactivation operation
is completed successfully. (The security light illuminates for 3 s and then goes out when
the immobilizer system has been deactivated.)
•
The immobilizer system cannot be disabled.
•
Due to immobilizer system characteristics, the engine cannot be started unless two or
more keys are programmed. Therefore, when resetting the immobilizer system (PCM
replacement, keyless control module replacement, or replacement of all programmed
keys), two or more keys usable with the immobilizer system must be readied before
starting the operation.
•
A maximum of eight keys can be programmed to one vehicle. The PID/data monitor
function can be used to verify the number of keys programmed to the vehicle.
•
A maximum of six card keys can be programmed to one vehicle. The PID/data monitor
function can be used to verify the number of keys programmed to the vehicle.
•
If there is a system malfunction or the immobilizer system is not properly deactivated due
to deactivation operation failure, the malfunction location can be verified by the flashing
pattern of the security light in the instrument cluster, or using the malfunction diagnosis
function of the on-board diagnostic system.
CAUTION: If any of the following items are touching or near the key head, signal
communication between the key and vehicle is negatively affected, resulting in the
engine not starting or a key programming error. Do not perform procedures if any
of the following items are touching or near the key head.
–
Any metallic object
–
Spare keys or keys for other vehicles equipped with an immobilizer system
–
Any electronic device, or any credit or other cards with magnetic strips
09-42
Body & Accessories
Service Training Mazda6 Facelift