System triggering conditions
The horn sounds intermittently and the hazard warning lights flash for about 30 seconds when the system is triggered by any one of the following:
If the system is triggered again, the lights and horn will activate until the driver's door or the trunk lid is unlocked with the transmitter.
(With the advanced keyless function)
The lights and horn can also be deactivated by pressing the request switch on a door.
NOTE
If the battery goes dead while the theftdeterrent system is armed, the horn will activate and the hazard warning lights will flash when the battery is charged or replaced.
Theft-Deterrent System (Some models)
How to Arm the SystemMazda 6 Owners Manual: Immobilizer system reprogram procedure
Note
When an error occurs during the reprogram procedures, except when
the PCM is replaced, repeat the procedure from Step 1. If you still cannot
reprogram, confirm how many keys can start the engine. Then, perform the key
replacement or addition reprogram procedure according to the val ...
Mazda 6 Owners Manual: A/c unit removal/installation
1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See RECOVERY.) (See CHARGING.)
3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT.)
4. Remove the dashboard. (See DASHBOARD REMOVAL/INSTALLATION.)
5. Remove the theft-deterrent control module. (See ...