SECURITY LIGHT: 11, DTC: B1681/P1260/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5001600

SECURITY LIGHT: 11

No detected communication with the coil antenna

DTC: B1681/P1260/P1260:00

DETECTION CONDITION

No detected communication with the coil antenna

POSSIBLE CAUSE

•  Coil antenna malfunction

•  Instrument cluster malfunction

•  Malfunction in the related wiring harnesses

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT COIL ANTENNA POWER SUPPLY SYSTEM

•  Disconnect the coil antenna connector.

•  Turn the ignition switch to the ON position.

•  Measure the voltage at coil antenna terminal D.

•  Is the voltage 8 V or more?

Yes

Go to the next step.

No

Repair the wiring harness.

2

INSPECT WIRING HARNESS BETWEEN COIL ANTENNA AND GROUND

•  Turn the ignition switch to the OFF position.

•  Inspect the wiring harness between coil antenna terminal C and ground for the following:

―  Short to power supply

―  Open circuit

•  Is the wiring harness normal?

Yes

Go to the next step.

No

Repair the wiring harness.

3

INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT

•  Connect the coil antenna connector.

•  Turn the ignition switch to the ON position.

•  Measure the voltage at coil antenna terminal B.

•  Is the voltage 8 V or more?

Yes

Go to Step 7.

No

Go to the next step.

4

INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT

•  Turn the ignition switch to the OFF position.

•  Disconnect the instrument cluster connector.

•  Turn the ignition switch to the ON position.

•  Measure the voltage at instrument cluster terminal 1G.

•  Is the voltage 8 V or more?

Yes

Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

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

No

Go to the next step.

5

INSPECT COMMUNICATION CIRCUIT (INPUT) FOR CONTINUITY

•  Turn the ignition switch to the OFF position.

•  Is there continuity between coil antenna terminal B and instrument cluster terminal 1G?

Yes

Go to the next step.

No

Repair the wiring harness.

6

INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT

•  Measure the resistance between coil antenna terminal C and ground.

•  Is the resistance 10 kilohms or more?

Yes

Replace the coil antenna.

(See COIL ANTENNA REMOVAL/INSTALLATION.)

No

Repair the wiring harness.

7

INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT

•  Connect the coil antenna connector and the instrument cluster connector.

•  Turn the ignition switch to the ON position.

•  Measure the voltage at coil antenna terminal A.

•  Is the voltage 8 V or more?

Yes

Replace the coil antenna.

(See COIL ANTENNA REMOVAL/INSTALLATION.)

No

Go to the next step.

8

INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT

•  Turn the ignition switch to the OFF position.

•  Disconnect the coil antenna connector.

•  Turn the ignition switch to the ON position.

•  Measure the voltage at coil antenna terminal A.

•  Is the voltage 8 V or more?

Yes

Replace the coil antenna.

(See COIL ANTENNA REMOVAL/INSTALLATION.)

No

Go to the next step.

9

INSPECT COMMUNICATION CIRCUIT (OUTPUT) FOR CONTINUITY

•  Turn the ignition switch to the OFF position.

•  Disconnect the instrument cluster connector.

•  Is there continuity between coil antenna terminal A and instrument cluster terminal 1E?

Yes

Go to the next step.

No

Repair the wiring harness.

10

INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT

•  Measure the resistance between instrument cluster terminal 1E and ground.

•  Is the resistance 10 kilohms or more?

Yes

Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

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

No

Repair the wiring harness.

SECURITY LIGHT: 11	No detected communication with the coil antenna
DTC: B1681/P1260/P1260:00	No detected communication with the coil antenna
DETECTION CONDITION	No detected communication with the coil antenna
POSSIBLE CAUSE	• Coil antenna malfunction • Instrument cluster malfunction • Malfunction in the related wiring harnesses

STEP	INSPECTION		ACTION
1	INSPECT COIL ANTENNA POWER SUPPLY SYSTEM • Disconnect the coil antenna connector. • Turn the ignition switch to the ON position. • Measure the voltage at coil antenna terminal D. • Is the voltage 8 V or more?	Yes	Go to the next step.
1		No	Repair the wiring harness.
2	INSPECT WIRING HARNESS BETWEEN COIL ANTENNA AND GROUND • Turn the ignition switch to the OFF position. • Inspect the wiring harness between coil antenna terminal C and ground for the following: ― Short to power supply ― Open circuit • Is the wiring harness normal?	Yes	Go to the next step.
2		No	Repair the wiring harness.
3	INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT • Connect the coil antenna connector. • Turn the ignition switch to the ON position. • Measure the voltage at coil antenna terminal B. • Is the voltage 8 V or more?	Yes	Go to Step 7.
3		No	Go to the next step.
4	INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT • Turn the ignition switch to the OFF position. • Disconnect the instrument cluster connector. • Turn the ignition switch to the ON position. • Measure the voltage at instrument cluster terminal 1G. • Is the voltage 8 V or more?	Yes	Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [KEYLESS ENTRY SYSTEM].)
4		No	Go to the next step.
5	INSPECT COMMUNICATION CIRCUIT (INPUT) FOR CONTINUITY • Turn the ignition switch to the OFF position. • Is there continuity between coil antenna terminal B and instrument cluster terminal 1G?	Yes	Go to the next step.
5		No	Repair the wiring harness.
6	INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT • Measure the resistance between coil antenna terminal C and ground. • Is the resistance 10 kilohms or more?	Yes	Replace the coil antenna. (See COIL ANTENNA REMOVAL/INSTALLATION.)
6		No	Repair the wiring harness.
7	INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT • Connect the coil antenna connector and the instrument cluster connector. • Turn the ignition switch to the ON position. • Measure the voltage at coil antenna terminal A. • Is the voltage 8 V or more?	Yes	Replace the coil antenna. (See COIL ANTENNA REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT • Turn the ignition switch to the OFF position. • Disconnect the coil antenna connector. • Turn the ignition switch to the ON position. • Measure the voltage at coil antenna terminal A. • Is the voltage 8 V or more?	Yes	Replace the coil antenna. (See COIL ANTENNA REMOVAL/INSTALLATION.)
8		No	Go to the next step.
9	INSPECT COMMUNICATION CIRCUIT (OUTPUT) FOR CONTINUITY • Turn the ignition switch to the OFF position. • Disconnect the instrument cluster connector. • Is there continuity between coil antenna terminal A and instrument cluster terminal 1E?	Yes	Go to the next step.
9		No	Repair the wiring harness.
10	INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT • Measure the resistance between instrument cluster terminal 1E and ground. • Is the resistance 10 kilohms or more?	Yes	Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [KEYLESS ENTRY SYSTEM].)
10		No	Repair the wiring harness.