DTC B2665 [BCM]

id0902f5833200

DTC B2665

Battery back sounder circuit failure
DETECTION CONDITION
Short to power supply in wiring harness between BCM and theft-deterrent siren
POSSIBLE CAUSE
•  Short to power supply in wiring harness between BCM terminal 5A and theft-deterrent siren terminal B
•  Theft-deterrent siren malfunction
•  BCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT THEFT-DETERRENT SIREN CONNECTOR
•  Turn the ignition switch to the LOCK position.
•  Disconnect the theft-deterrent siren connector.
•  Inspect the theft-deterrent siren connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 4.
No
Go to the next step.
2
INSPECT BCM CONNECTOR
•  Disconnect the BCM connector.
•  Inspect the BCM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 4.
No
Go to the next step.
3
INSPECT THEFT-DETERRENT SIREN SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Measure the voltage between theft-deterrent siren terminal B (wiring harness-side) and body GND.
•  Is the voltage B+?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
No
Replace the theft-deterrent siren, then go to the next step.
(See THEFT-DETERRENT SIREN REMOVAL/INSTALLATION [WITH INTRUDER SENSOR].)
4
INSPECT THE WIRING HARNESS BETWEEN THEFT-DETERRENT SIREN AND BCM
•  Inspect the following wiring harnesses for short circuit.
―  Between theft-deterrent siren terminal B and BCM terminal 5A
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the BCM memory using the M-MDS.
•  Turn the ignition switch to LOCK position then ON position.
•  Is the same DTC present?
Yes
Replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.