Mazda CX-7 2007 Workshop Manual page 1335

ON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
SECURITY LIGHT 13, DTC B2431/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
SECURITY LIGHT: 13
DTC: B2431/P1260
DETECTION CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 VERIFY DTC
• Is B2431/P1260 displayed?
2 VERIFY DTC
• Is B1600/P1260 displayed?
3 INSPECT INSTRUMENT CLUSTER
• Using the M-MDS, clear the key ID number and
re-register it.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)
Note
• Two or more keys must be registered to
start the engine.
• Using the registered key, turn the ignition switch
to the ON position.
• Verify the DTC Using the M-MDS.
— Is B2431/P1260 displayed again?
End Of Sie
Key ID number registration error
• Key ID number registration error
• Errors during key ID number registration procedure
• 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 Go to Step 3.
No Go to the next step.
Yes Perform the DTC inspection for "SECURITY LIGHT: 13,
M-MDS: B1600/P1260".
(See 09-02C-7 SECURITY LIGHT 13, DTC B1600/
P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY
SYSTEM)].)
No Go to the next step.
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.
id0902e5800900
ACTION
09-02C–9
09-02C