Mazda CX-7 2007 Workshop Manual page 1311

ON-BOARD DIAGNOSTIC [ADVANCED KEYLESS SYSTEM]
DTC B112A[ADVANCED KEYLESS SYSTEM]
DTC B112A Keyless antenna (interior, front)
DETECTION
• Keyless antenna dose not operated.
CONDITION
• Keyless antenna (interior, front) malfunction
POSSIBLE
• Open or short circuit in wiring harness between keyless control module and keyless antenna
CAUSE
• Keyless control module malfunction
Diagnostic procedure
STEP INSPECTION
1 INSPECT COMMUNICATION CIRCUIT FOR
CONTINUITY
• Disconnect keyless control module
connector and keyless antenna (interior,
front) connector.
• Inspect the continuity between the following
connector terminals.
— keyless control module: 1O—keyless
antenna: A
— keyless control module: 1P—keyless
antenna: B
• Is there continuity?
2 INSPECT KEYLESS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
— M-MDS: B112A
End Of Sie
ADVANCED KEYLESS ENTRY AND START SYSTEM DTC B1134[ADVANCED KEYLESS SYSTEM]
DTC B1134 Unprogrammed card key.
• Unprogrammed card key
POSSIBLE
• Malfunction in the keyless control module internal circuit
CAUSE
Diagnostic procedure
STEP INSPECTION
1 VERIFY NUMBER OF REGISTERED CARD
KEYS
• Using the WDS or equivalent, perform the
PID/data monitor inspection and confirm the
number of registered keys.
(See 09-02A-4 PID/DATA MONITOR
TABLE[ADVANCED KEYLESS SYSTEM])
• Is card key registered?
2 INSPECT KEYLESS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
— M-MDS: B1134
End Of Sie
ACTION
Yes Replace keyless antenna (interior, front).
(See 09-14-37 KEYLESS ANTENNA REMOVAL/
INSTALLATION[ADVANCED KEYLESS SYSTEM].)
Go to next step.
No Repair the wiring harness between the keyless antenna
(interior, front) and keyless control module.
Go to next step.
Yes Replace the keyless control module and perform the
resetting procedure for the advanced keyless system when
replacing the keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE REMOVAL/
INSTALLATION[ADVANCED KEYLESS SYSTEM].)
No DTC troubleshooting completed.
ACTION
Yes Replace the keyless control module and perform the
resetting procedure for the advanced keyless system when
replacing the keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE REMOVAL/
INSTALLATION[ADVANCED KEYLESS SYSTEM].)
No Using the WDS or equivalent, register a card key if
necessary.
(See 09-14-33 CARD KEY ID CODE
REGISTRATION[ADVANCED KEYLESS SYSTEM])
Go to the next step.
Yes Replace the keyless control module and perform the
resetting procedure for the advanced keyless system when
replacing the keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE REMOVAL/
INSTALLATION[ADVANCED KEYLESS SYSTEM].)
No DTC troubleshooting completed.
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09-02A
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09-02A–11