Mazda 2006 MX-5 Service Highlights page 436

SECURITY AND LOCKS [KEYLESS ENTRY SYSTEM]
ON-BOARD DIAGNOSTIC SYSTEM OUTLINE [IMMOBILIZER SYSTEM]
• The immobilizer system is provided with a malfunction diagnosis function.
• Malfunction diagnosis of the immobilizer system occurs automatically when the ignition switch is turned from
the LOCK (ACC) to the ON (START) position.
• If the results of the malfunction diagnosis show a malfunction in the immobilizer system, the security light
displays a DTC. At the same time, DTCs are stored in the PCM and instrument cluster. The stored DTCs can
be verified using the WDS or equivalent.
Caution
• Always use the WDS or equivalent to verify DTCs even if the security light display 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 WDS or equivalent, not the security
light.
• DTCs for the immobilizer system that are stored in the instrument cluster and PCM are cleared
when the ignition switch is turned from the ON to the LOCK (ACC) position.
Note
• If two or more malfunctions 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.
DTC Table
Note
• In the approx. 1 min after detecting a malfunction and before displaying the DTC, the security light will
illuminate or flash the following patterns:
Security light flashing pattern
(Before displaying DTC)
ILLUMINATED
GOES OUT
ILLUMINATED
GOES OUT
Security light flashing pattern
11
12
13
09–14B–10
11, 12, 13, 14, 15, 16
21, 22, 23
DTC
WDS or equivalent
display
Instrument
cluster
B1681
B2103
B1600
B2431
DTC
*
Detection condition
PCM
P1260 No detected communication with the coil
• Coil antenna malfunction
• The PCM determined a malfunction in the coil
P1260
antenna even though it is normal.
P1260 The key ID number data cannot be read.
P1260 Key ID number registration error
E5U091467000N16