Mazda CX-7 2007 Workshop Manual page 1314

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
FOREWORD[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
• Malfunction diagnosis of the immobilizer system occurs automatically when the ignition switch is turned from
the LOCK (ACC) to the ON (START) position.
• Results of the malfunction diagnosis can be verified from the DTCs. There are two methods of DTC verification:
By the flashing pattern of the security light and by using the M-MDS.
• First, verify that the fuses are normal.
• The PID/data monitor function can be used to verify the number of key ID numbers registered for a single
vehicle.
Caution
• Always use the M-MDS or equivalent to verify DTCs even if the security light displays a DTC. If the
security light itself has a malfunction, it is possible that a DTC may not be properly displayed.
There are certain DTCs which can only be verified using the M-MDS, not the security light.
• DTCs for the immobilizer system that are stored in the keyless unit and PCM are cleared when the
ignition switch is turned from the ON to the LOCK (ACC) position.
• If DTCs are not displayed even though the engine does not start or stalls, perform the following
symptom troubleshooting:
— 01-03-17 NO.3 WILL NOT CRANK[L3 WITH TC]
• The following conditions may cause poor signal communication between the key and vehicle,
resulting in the engine not starting or a key registration error. Do not perform any work under the
following conditions:
— If any of the following items are touching or near the key head.
• Spare keys
• Keys for other vehicles equipped with an immobilizer system
• Any metallic object
• Any electronic device, or any
credit or other cards with
magnetic strips
Note
• If two or more abnormalities are detected as
a result of malfunction diagnosis, only the
DTC with the lowest number of those
detected will be displayed by the security
light. However, multiple DTCs are stored at
the same time.
• If two or more immobilizer system DTCs are
verified, first repair the part indicated by the
security light displayed DTC. After
completely repairing one location, turn the
ignition switch from the LOCK to the ON
position and perform immobilizer system
malfunction diagnosis.
End Of Sie
DTC INSPECTION[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
Security Light
1. Turn the ignition switch to the ON position.
2. Verify the security light state.
• If there is any malfunction:
— After any malfunction is detected, the security light will function as follows for approx. 1 min.
• DTC 16 and lower: Flashes
• DTC 21 and higher: Illuminated
• If there is no malfunction:
— The security light illuminates for approx. 3 s and goes out.
09-02B–2
ON-BOARD DIAGNOSTIC
EXAMPLES:
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METAL RING LYING ON KEY HEAD
METAL PART OF ANOTHER
KEY TOUCHING KEY HEAD
KEY IS NEAR OR TOUCHING
ANOTHER IMMOBILIZER SYSTEM KEY
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