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SECURITY LIGHT: DTC 11 (WDS OR EQUIVALENT: DTC B1681)

id0902e5914400

DTC 11 (B1681) | Coil antenna signal is not received.
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POSSIBLE CAUSE | • Defective wiring harness • Defective coil antenna • Defective PCM

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT POWER SUPPLY CIRCUIT OF COIL ANTENNA • Disconnect coil antenna connector. • Turn ignition switch to ON position. • Measure voltage at terminal D of coil antenna connector. • Is voltage more than 8 V? | Yes | Go to next step.
No | Repair wiring harness.
2 | INSPECT WIRING HARNESS BETWEEN COIL ANTENNA AND GROUND • Turn ignition switch to LOCK position. • Inspect wiring harness between coil antenna connector terminal C and ground for following. - Short to power supply - Open circuit • Is wiring harness okay? | Yes | Go to next step.
No | Repair wiring harness.
3 | INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT • Connect coil antenna connector. • Turn ignition switch to ON position. • Measure voltage at terminal B of coil antenna connector. • Is voltage more than 8 V? | Yes | Go to Step 7.
No | Go to next step.
4 | INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT • Turn ignition switch to LOCK position. • Disconnect PCM connector. • Turn ignition switch to ON position. • Measure voltage at terminal 2T of PCM connector. • Is voltage more than 8 V? | Yes | Replace PCM and reprogram immobilizer system. (See IMMOBILIZER SYSTEM REPROGRAM PROCEDURE [KEYLESS ENTRY SYSTEM])
No | Go to next step.
5 | INSPECT COMMUNICATION CIRCUIT (INPUT) FOR CONTINUITY • Turn ignition switch to LOCK position. • Disconnect coil antenna and PCM connectors. • Is there continuity between coil antenna connector terminal B and PCM connector terminal 2T? | Yes | Go to next step.
No | Repair wiring harness.
6 | INSPECT COIL ANTENNA INPUT SIGNAL CIRCUIT • Measure resistance between coil antenna connector terminal B and ground. • Is resistance more than 10 kilohms? | Yes | Replace coil antenna. (See COIL ANTENNA REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM])
No | Repair wiring harness.
7 | INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT • Connect coil antenna and PCM connectors. • Turn ignition switch to ON position. • Measure voltage at terminal A of coil antenna connector. • Is voltage more than 8 V? | Yes | Replace coil antenna. (See COIL ANTENNA REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM])
No | Go to next step.
8 | INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT • Turn ignition switch to LOCK position. • Disconnect coil antenna connector. • Turn ignition switch to ON position. • Measure voltage at terminal A of coil antenna connector. • Is voltage more than 8 V? | Yes | Replace coil antenna. (See COIL ANTENNA REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM])
No | Go to next step.
9 | INSPECT COMMUNICATION CIRCUIT (OUTPUT) FOR CONTINUITY • Turn ignition switch to LOCK position. • Disconnect PCM connector. • Is there continuity between coil antenna connector terminal A and PCM connector terminal 2Q? | Yes | Go to next step.
No | Repair wiring harness.
10 | INSPECT COIL ANTENNA OUTPUT SIGNAL CIRCUIT • Measure resistance between PCM connector terminal 2Q and ground. • Is resistance more than 10 kilohms? | Yes | Replace PCM and reprogram immobilizer system. (See IMMOBILIZER SYSTEM REPROGRAM PROCEDURE [KEYLESS ENTRY SYSTEM])
No | Repair wiring harness.