Mazda RX-8 Workshop Manual page 3029

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2011 - RX-8 - Body and Accessories
SECURITY LIGHT: 23, DTC B2139/P1260 [IMMOBILIZER SYSTEM]
SECURITY LIGHT:
23
DTC: B2139/P1260
DETECTION
CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 VERIFY DTC USING M-MDS
Are either U1900 or U0073, or
both, displayed, by either the
keyless control module or the
PCM, or both.
2 Perform procedures for when
replacing the PCM only.
(See
RELATED PARTS PROGRAMMING
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.
Keyless control module malfunction
PCM malfunction
Necessary procedures were not performed using the M-MDS after
replacing the PCM.
INSPECTION
IMMOBILIZER SYSTEM-
YesPerform troubleshooting according to the
corresponding DTC inspection.
No Go to the next step.
Yes Replace the keyless control
module and perform
procedures for when replacing
the keyless control module
only.
ACTION