Mazda CX-7 2007 Workshop Manual page 1336

ON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
SECURITY LIGHT 14, DTC B1602/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
SECURITY LIGHT: 14
DTC: B1602/P1260
DETECTION CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 VERIFY WHETHER KEY IS VALID OR NOT
• Using another registered key, turn the ignition
switch to the ON position.
• If there is not another registered key, register an
additional key using the M-MDS and turn the
ignition key to the ON position using the
registered key.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)
• Is the DTC displayed again?
— Security light: 14
— M-MDS: B1602/P1260
2 INSPECT INSTRUMENT CLUSTER
• Using another registered key, turn the ignition
switch to the ON position.
• Is the DTC displayed again?
— Security light: 14
— M-MDS: B1602/P1260
End Of Sie
09-02C–10
The instrument cluster cannot read key ID number data normally.
• The instrument cluster cannot read key ID number data normally.
• Transponder (key) malfunction
• Coil antenna malfunction
• Instrument cluster malfunction
• 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
EXAMPLES:
INSPECTION
METAL RING LYING ON KEY HEAD
METAL PART OF ANOTHER
KEY TOUCHING KEY HEAD
KEY IS NEAR OR TOUCHING
ANOTHER IMMOBILIZER SYSTEM KEY
Yes Replace the coil antenna, then go to the next step.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)
• Dispose of the malfunctioning key.
No
• Register a new key if necessary.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)
Yes Replace the instrument cluster and perform the
resetting procedure for the immobilizer system when
replacing the instrument cluster.
(See 09-22-2 INSTRUMENT CLUSTER REMOVAL/
INSTALLATION.)
(See 09-14-20 IMMOBILIZER SYSTEM COMPONENT
REPLACEMENT/KEY ADDITION AND
CLEARING[KEYLESS ENTRY SYSTEM].)
No DTC troubleshooting completed.
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ACTION