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ON-BOARD DIAGNOSTIC SYSTEM OUTLINE [IMMOBILIZER SYSTEM]

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• The immobilizer system is provided with a malfunction diagnosis function.
• Malfunction diagnosis of the immobilizer system occurs automatically when the ignition switch is turned from the LOCK (ACC) to the ON (START) position.
• If the results of the malfunction diagnosis show a malfunction in the immobilizer system, the security light displays a DTC. At the same time, DTCs are stored in the PCM and instrument cluster. The stored DTCs can be verified using the WDS or equivalent.

  Caution

  • Always use the WDS or equivalent to verify DTCs even if the security light display a DTC. If the security light itself has a malfunction, it is possible that a DTC may not be properly displayed. There are certain DTCs which can only be verified using the WDS or equivalent, not the security light.
  • DTCs for the immobilizer system that are stored in the instrument cluster and PCM are cleared when the ignition switch is turned from the ON to the LOCK (ACC) position.

## DTC Table

DTC | Description
--- | ---
Security light | Security light flashing pattern | WDS
11 |  | B1681 | Coil signal is not received.
12 |  | B2103 | Coil failure.
13 |  | B1600 | ID number signal is not received.
B2431 | Transponder programming failure.
14 |  | B1602 | PCM received invalid format of ID number from transponder.
15 |  | B1601 | PCM received incorrect ID number from key (transponder).
21 |  | B1213 | Number of valid keys is below minimum.
Not illuminated | - | B1342 | PCM is defective.