Mazda CX-7 2007 Workshop Manual page 1326

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
SECURITY LIGHT 23, DTC B2139/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
SECURITY LIGHT: 23
DTC: B2139/P1260
DETECTION CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 VERIFY DTC
• Are either U1900 or U0073, or both, displayed, by
either the keyless control module or the PCM, or
both?
2 EXAMINE KEYLESS CONTROL MODULE AND
PCM
• Perform procedures for when replacing the PCM
only.
(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.
• Is the DTC displayed?
— Security light: 23
— M-MDS: B2139/P1260
3 VERIFY DTC
• Is the DTC displayed again?
— Security light: 23
— M-MDS: B2139/P1260
End Of Sie
DTC B1342[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
DTC B1342 ECU is faulted
DETECTION Keyless control module malfunction
CONDITION
• Keyless control module malfunction
POSSIBLE
CAUSE
Diagnostic procedure
Replace the Keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE REMOVAL/INSTALLATION[ADVANCED KEYLESS SYSTEM].)
End Of Sie
09-02B–14
ON-BOARD DIAGNOSTIC
ID number data in the PCM and the keyless control module do not match.
• ID number data in the keyless control module and the PCM are different.
• Necessary procedures were not performed using the M-MDS after replacing the PCM.
• Keyless control module malfunction
• PCM malfunction
INSPECTION
Yes Perform troubleshooting according to the
corresponding DTC inspection.
(See 09-02D-14 DTC U0073[MULTIPLEX
COMMUNICATION SYSTEM].)
No Go to the next step.
• Replace the keyless control module and perform
Yes
the resetting procedure for the immobilizer system
when replacing the keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE
REMOVAL/INSTALLATION[ADVANCED
KEYLESS SYSTEM].)
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)
• Go to the next step.
No DTC troubleshooting completed.
• Replace the PCM and perform the resetting
Yes
procedure for the immobilizer system when
replacing the PCM.
(See 01-40-6 PCM REMOVAL/
INSTALLATION[L3 WITH TC].)
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)
No DTC troubleshooting completed.
ACTION
id0902e3801500
ACTION
id0902e3801600