Mazda CX-7 2007 Workshop Manual page 1334

ON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
Diagnostic Procedure
STEP
1 VERIFY DTC
• Is B1600/P1260 displayed?
2 VERIFY DTC
• Is B2431/P1260 displayed?
3 VERIFY WHETHER KEY IS VALID OR NOT
• Are there any keys with which the engine can be
started, other than the key that is a cause of the
displayed DTC?
4 VERIFY WHETHER MALFUNCTION IS IN
KEY OR COIL ANTENNA
• Using the M-MDS, register an additional key.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)
• Using the registered key, turn the ignition switch
to the ON position.
• Verify the DTC using the M-MDS.
— Is B1600/P1260 displayed again?
5 VERIFY WHETHER MALFUNCTION IS IN
KEY OR COIL ANTENNA
• Using another valid key, turn the ignition switch
to the ON position.
• Verify the DTC Using the M-MDS.
— Is B1600/P1260 displayed again?
6 INSPECT INSTRUMENT CLUSTER
• Using the registered key, turn the ignition switch
to the ON position.
— Is B1600/P1260 displayed again?
End Of Sie
09-02C–8
INSPECTION
Yes Go to Step 3.
No Go to the next step.
Yes Perform the DTC inspection for "SECURITY LIGHT: 13,
M-MDS: B2431/P1260".
(See 09-02C-9 SECURITY LIGHT 13, DTC B2431/
P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY
SYSTEM)].)
No Go to the next step.
Yes Go to Step 5.
No Go to the next step.
Yes Replace the coil antenna, then go to Step 6.
(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 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.
ACTION