SECURITY LIGHT: 11

No detected communication with the coil antenna

DTC: B1681/P1260

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.

No

Repair the wiring harness.

2

INSPECT WIRING HARNESS BETWEEN COIL ANTENNA AND GROUND

• Turn the ignition switch to the LOCK 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 LOCK position.

• Disconnect the instrument cluster connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at instrument cluster terminal 2S.

• 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 LOCK position.

• Is there continuity between coil antenna terminal B and instrument cluster terminal 2S?

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 B and ground.

• Is the resistance 10 kilohms or more?

Yes

Replace the coil antenna.

(See COIL ANTENNA REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM].)

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 [KEYLESS ENTRY SYSTEM].)

No

Go to the next step.

8

INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT

• Turn the ignition switch to the LOCK 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 [KEYLESS ENTRY SYSTEM].)

No

Go to the next step.

9

INSPECT COMMUNICATION CIRCUIT (OUTPUT) FOR CONTINUITY

• Turn the ignition switch to the LOCK position.

• Disconnect the instrument cluster connector.

• Is there continuity between coil antenna terminal A and instrument cluster terminal 2Q?

Yes

Repair the wiring harness.

No

Go to the next step.

10

INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT

• Measure the resistance between instrument cluster terminal 2Q 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.