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SECURITY LIGHT: 23, DTC B2139/P1260

BHE090201077W15

SECURITY LIGHT: 23 | ID number data in the PCM and the keyless unit do not match.
DTC: B2139/P1260
DETECTION CONDITION | • ID number data in the keyless unit and the PCM are different.
POSSIBLE CAUSE | • Necessary procedures were not performed using the WDS after replacing the PCM. • Keyless unit malfunction • PCM malfunction

## Diagnostic Procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | VERIFY DTC USING WDS • Are either U1900 or U0073, or both, displayed, by either the keyless unit or the PCM, or both. | Yes | Perform troubleshooting according to the corresponding DTC inspection. (See DTC U0073, U1900, U2516.)
No | Go to the next step.
2 | • Perform procedures for when replacing the PCM only. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.) • Using the registered key, turn the ignition switch to the ON position. • Is the DTC displayed? – SECURITY LIGHT: 23 – WDS: B2139/P1260 | Yes | • Replace the keyless unit and perform procedures for when replacing the keyless unit only. (See KEYLESS UNIT REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.) • Go to the next step.
No | DTC troubleshooting completed.
3 | • Are any or all of the following DTCs displayed again? – SECURITY LIGHT: 23 – WDS: B2139/P1260 | Yes | • Replace the PCM and perform procedures for when replacing the PCM only. (See PCM REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.)
No | DTC troubleshooting completed.