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

id0902e4903700

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 OR EQUIVALENT

•  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.)

(See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM].)

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 or equivalent: 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.)

(See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM].)

No

DTC troubleshooting completed.

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

STEP	INSPECTION		ACTION
1	VERIFY DTC USING WDS OR EQUIVALENT • 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.)
1		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.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM].) 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 or equivalent: 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.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM].)
2		No	DTC troubleshooting completed.