Mazda CX-7 2007 Workshop Manual page 1319

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
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SECURITY LIGHT 13, DTC B1600/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
SECURITY LIGHT: 13
DTC: B1600/P1260
DETECTION CONDITION
POSSIBLE CAUSE
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 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
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?
ON-BOARD DIAGNOSTIC
The key ID number data cannot be read.
• The key ID number data cannot be read.
• No transponder in the key
• Transponder malfunction (Key ID number is not output)
• Coil antenna malfunction
• Keyless control module 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 Go to Step 3.
No Go to the next step.
Yes Perform the DTC inspection for "SECURITY LIGHT: 13,
M-MDS: B2431/P1260".
(See 09-02B-8 SECURITY LIGHT 13, DTC B2431/
P1260[IMMOBILIZER SYSTEM (ADVANCED
KEYLESS 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 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)
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ACTION
09-02B–7
09-02B