Mazda CX-7 2007 Workshop Manual page 1338

ON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
SECURITY LIGHT 16, DTC U2510/P1260, U1147/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
DTC: U2510/P1260 Communication error between the instrument cluster and the PCM (no response)
SECURITY
LIGHT: 16
DTC: U1147/P1260
DETECTION CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 VERIFY DTC
• Are either U1900 or U0073, or both, displayed,
by either the instrument cluster or the PCM, or
both?
2 VERIFY DTC
• Using the registered key, turn the ignition switch
to the ON position.
• Is the DTC displayed?
— Security light: 16
— M-MDS: U2510 or U1147/P1260
End Of Sie
SECURITY LIGHT 21, DTC B1213/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
SECURITY LIGHT: 21
DTC: B1213/P1260
DETECTION CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 VERIFY NUMBER OF REGISTERED KEYS
• Using the M-MDS, perform the PID/data monitor
inspection and confirm the number of registered
keys.
(See 09-02C-4 PID/DATA MONITOR
TABLE[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)].)
• Are two or more keys registered?
09-02C–12
Communication error between the instrument cluster and the PCM (mismatched
conditions)
Instrument cluster DTC: U2510
• Communication error between the instrument cluster and the PCM (no response)
Instrument cluster DTC: U1147
• Communication error between the instrument cluster and the PCM (mismatched
conditions)
• Malfunction in the wiring harness (CAN line) between the instrument cluster and the
PCM
• PCM malfunction
• Instrument cluster malfunction
INSPECTION
Only one key ID number is registered.
• Only one key is registered.
• Only one registered key
INSPECTION
Yes Perform troubleshooting according to the corresponding
DTC inspection.
(See 09-02D-14 DTC U0073[MULTIPLEX
COMMUNICATION SYSTEM].)
No 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].)
Go to the next step.
Yes Replace the PCM and perform the resetting procedure
for the immobilizer system when replacing the PCM.
(See 01-40-6 PCM REMOVAL/INSTALLATION[L3
WITH TC].)
(See 09-14-20 IMMOBILIZER SYSTEM COMPONENT
REPLACEMENT/KEY ADDITION AND
CLEARING[KEYLESS ENTRY SYSTEM].)
No DTC troubleshooting completed.
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].)
• Using the M-MDS, clear the key ID number and
No
register a new key if necessary.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)
• Go to the next step.
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