SECURITY LIGHT: 14, DTC: B10D7:81/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

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DTC

Security light flashing pattern

14

Receiving erratic serial data

M-MDS display

Instrument cluster

B10D7:81

PCM

P1260:00
DETECTION CONDITION
•  Instrument cluster cannot read the key ID number data normally.
POSSIBLE CAUSE
•  Coil antenna connector or terminals malfunction
•  Instrument cluster connector or terminals malfunction
•  Key (transponder) malfunction
•  Coil antenna malfunction
•  PCM malfunction
•  Instrument cluster malfunction
•  
Note
•  If any of the following items are touching or near key head, signal communication between key and vehicle is negatively affected, resulting in engine not starting
―  Keys for other vehicles equipped with an immobilizer system
―  Spare keys
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―  Any metallic object
―  Any electronic device, or any credit or other card with magnetic strips

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT COIL ANTENNA CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the coil antenna connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
2
INSPECT INSTRUMENT CLUSTER CONNECTOR AND TERMINALS
•  Disconnect the instrument cluster connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
3
VERIFY WHETHER THERE IS A VALID KEY
•  Are there any valid keys which can start the engine other than the cause of the displayed DTC?
Yes
Go to the next step.
No
Program an additional key referring to the immobilizer system-related parts programming, then go to the next step.
(See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [KEYLESS ENTRY SYSTEM].)
4
VERIFY WHETHER MALFUNCTION IS CAUSED BY KEY OR COIL ANTENNA
•  Make sure to reconnect the disconnected connector.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON (engine off) using the valid key other than the cause of the displayed DTC.
•  Clear the DTC from the instrument cluster and PCM using the M-MDS.
•  Perform the immobilizer system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the coil antenna, then go to the next step.
(See COIL ANTENNA REMOVAL/INSTALLATION.)
No
Dispose of the malfunctioning key and program a new key if necessary, then go to Step 7.
(See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [KEYLESS ENTRY SYSTEM].)
Note
•  To start the engine, two or more programmed keys are necessary.
5
VERIFY PCM MALFUNCTION
•  Clear the DTC from the instrument cluster and PCM using the M-MDS.
•  Perform the immobilizer system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF, L5].)
(See PCM REMOVAL/INSTALLATION [ZY, Z6].)
(See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6) (EURO5 emission level)].)
(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
(See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to Step 7.
6
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connector.
•  Reconnect the negative battery cable.
•  Clear the DTC from the instrument cluster and PCM using the M-MDS.
•  Perform the immobilizer system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the instrument cluster, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)
No
DTC troubleshooting completed.