Mazda CX-7 2007 Workshop Manual page 1318

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
STEP
6 INSPECT COIL ANTENNA INPUT SIGNAL
CIRCUIT
• Measure the resistance between coil antenna
terminal B and ground.
— Is the resistance 10 kilohms or more?
7 INSPECT COIL ANTENNA OUTPUT SIGNAL
CIRCUIT
• Connect the coil antenna connector and the
keyless control module connector.
• Turn the ignition switch to the ON position.
• Measure the voltage at coil antenna terminal A.
— Is the voltage 8 V or more?
8 INSPECT COIL ANTENNA OUTPUT SIGNAL
CIRCUIT
• Turn the ignition switch to the LOCK position.
• Disconnect the coil antenna connector.
• Turn the ignition switch to the ON position.
• Measure the voltage at coil antenna terminal A.
— Is the voltage 8 V or more?
9 INSPECT COMMUNICATION CIRCUIT
(OUTPUT) FOR CONTINUITY
• Turn the ignition switch to the LOCK position.
• Disconnect the keyless control module
connector.
• Is there continuity between coil antenna terminal
A and keyless control module terminal 3V?
10 INSPECT COIL ANTENNA OUTPUT SIGNAL
CIRCUIT
• Measure the resistance between keyless control
module terminal 3V and ground.
— Is the resistance 10 kilohms or more?
End Of Sie
SECURITY LIGHT 12, DTC B2103/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]
SECURITY LIGHT: 12
DTC: B2103/P1260
DETECTION CONDITION
POSSIBLE CAUSE
Diagnostic Procedure
STEP
1 INSPECT CONNECTOR CONNECTION
• Are the coil antenna connector and the keyless
control module connector securely connected?
2 INSPECT PCM
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
— Security light: 12
— M-MDS: B2103/P1260
09-02B–6
ON-BOARD DIAGNOSTIC
INSPECTION
• Coil antenna malfunction
• The PCM determined a malfunction in the coil antenna even though it is normal.
• Coil antenna malfunction
• The PCM determined a malfunction in the coil antenna even though it is normal.
• Coil antenna malfunction
• Poor connection of the coil antenna connector
• PCM malfunction
INSPECTION
Yes Replace the coil antenna.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)
No Repair the wiring harness.
Yes Replace the coil antenna.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)
No Go to the next step.
Yes Replace the coil antenna.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)
No Go to the next step.
Yes Repair the wiring harness.
No Go to the next step.
Yes Replace the keyless control module and perform 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].)
No Repair the wiring harness.
Yes Replace the coil antenna, then go to the next step.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)
No Connect the connector securely.
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 09-14-11 IMMOBILIZER SYSTEM COMPONENT
REPLACEMENT/KEY ADDITION AND
CLEARING[ADVANCED KEYLESS SYSTEM].)
No DTC troubleshooting completed.
ACTION
id0902e3800700
ACTION