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SECURITY LIGHT: 16, DTC U2510/P1260, U1147/P1260

BHE090201077W12

SECURITY LIGHT: 16 | DTC: U2510/P1260 | Communication error between the keyless unit and the PCM (no response)
DTC: U1147/P1260 | Communication error between the keyless unit and the PCM (mismatched conditions)
DETECTION CONDITION | Keyless unit DTC: U2510 • Communication error between the keyless unit and the PCM (no response) Keyless unit DTC: U1147 • Communication error between the keyless unit and the PCM (mismatched conditions)
POSSIBLE CAUSE | • Malfunction in the wiring harness (CAN line) between the keyless unit and the PCM • PCM malfunction • Keyless unit 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 | 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.
2 | VERIFY DTC • Using the registered key, turn the ignition switch to the ON position. • Is the DTC displayed? – SECURITY LIGHT: 16 – WDS: U2510 or U1147/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.