SECURITY LIGHT 11, DTC B1681/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
id0902e5800600
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DTC |
Security light flashing pattern |
11 |
No detected communication with coil antenna. |
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M-MDS display |
Instrument cluster |
B1681 |
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PCM |
P1260 |
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POSSIBLE CAUSE
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• The coil antenna connector is pulled out
• Coil antenna malfunction
• Instrument cluster malfunction
• Related wiring harnesses malfunction
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System wiring diagram
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Diagnostic Procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT COIL ANTENNA POWER SUPPLY SYSTEM
• Disconnect the coil antenna connector.
• Turn the ignition switch to the ON position.
• Measure the voltage at coil antenna terminal D.
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Yes
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Go to the next step.
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No
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Repair the wiring harness.
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2
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INSPECT WIRING HARNESS BETWEEN COIL ANTENNA AND GROUND
• Turn the ignition switch to the LOCK position.
• Inspect the wiring harness between coil antenna terminal C and ground for the following:
• Is the wiring harness normal?
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Yes
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Go to the next step.
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No
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Repair the wiring harness.
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3
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INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT
• Connect the coil antenna connector.
• Turn the ignition switch to the ON position.
• Measure the voltage at coil antenna terminal B.
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Yes
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Go to Step 7.
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No
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Go to the next step.
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4
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INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT
• Turn the ignition switch to the LOCK position.
• Disconnect the instrument cluster connector.
• Turn the ignition switch to the ON position.
• Measure the voltage at instrument cluster terminal 2S.
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Yes
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Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster.
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No
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Go to the next step.
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5
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INSPECT COMMUNICATION CIRCUIT (INPUT) FOR CONTINUITY
• Turn the ignition switch to the LOCK position.
• Is there continuity between coil antenna terminal B and instrument cluster terminal 2S?
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Yes
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Go to the next step.
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No
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Repair the wiring harness.
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6
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INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT
• Measure the resistance between coil antenna terminal B and ground.
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Yes
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Replace the coil antenna.
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No
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Repair the wiring harness.
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7
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INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT
• Connect the coil antenna connector and the instrument cluster connector.
• Turn the ignition switch to the ON position.
• Measure the voltage at coil antenna terminal A.
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Yes
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Replace the coil antenna.
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No
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Go to the next step.
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8
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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.
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Yes
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Replace the coil antenna.
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No
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Go to the next step.
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9
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INSPECT COMMUNICATION CIRCUIT (OUTPUT) FOR CONTINUITY
• Turn the ignition switch to the LOCK position.
• Disconnect the instrument cluster connector.
• Is there continuity between coil antenna terminal A and instrument cluster terminal 2Q?
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Yes
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Go to the next step.
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No
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Repair the wiring harness.
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10
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INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT
• Measure the resistance between instrument cluster terminal 2Q and ground.
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Yes
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Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster.
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No
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Repair the wiring harness.
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