DTC B10A5:87 [THEFT-DETERRENT SYSTEM]

id0902g7850500

DESCRIPTION	Communication error between theft-deterrent siren and theft-deterrent control module
DETECTION CONDITION	•  Theft-deterrent control module detects the communication error between theft-deterrent siren and theft-deterrent control module.
POSSIBLE CAUSE	•  Theft-deterrent siren connector or terminals malfunction •  Theft-deterrent control module connector or terminals malfunction •  Short to ground in wiring harness between theft-deterrent siren terminal B and theft-deterrent control module terminal C •  Short to power supply in wiring harness between theft-deterrent siren terminal B and theft-deterrent control module terminal C •  Open circuit in wiring harness between theft-deterrent siren terminal B and theft-deterrent control module terminal C •  Theft-deterrent siren malfunction •  Theft-deterrent control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT THEFT-DETERRENT SIREN CONNECTOR •  Turn the ignition switch to the LOCK position. •  Disconnect the negative battery cable. •  Disconnect the theft-deterrent siren connector. •  Inspect the theft-deterrent siren connector.(Corrosion, damage, and disconnected pins) •  Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 7.
		No	Go to the next step.
2	INSPECT THEFT-DETERRENT CONTROL MODULE CONNECTOR •  Disconnect the theft-deterrent control module connector. •  Inspect the theft-deterrent control module connector. (Corrosion, damage, and disconnected pins) •  Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 7.
		No	Go to the next step.
3	INSPECT THEFT-DETERRENT SIREN SIGNAL CIRCUIT FOR SHORT TO GROUND •  Verify that the theft-deterrent siren and theft-deterrent control module connectors are disconnected. •  Inspect for continuity between theft-deterrent siren terminal B (wiring harness-side) and body ground. •  Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
		No	Go to the next step.
4	INSPECT THEFT-DETERRENT SIREN SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY •  Verify that the theft-deterrent siren and theft-deterrent control module connectors are disconnected. •  Reconnect the negative battery cable. •  Turn the ignition switch to the ON position. •  Measure the voltage at the theft-deterrent siren terminal B (wiring harness-side). •  Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
		No	Go to the next step.
5	INSPECT THEFT-DETERRENT SIREN SIGNAL CIRCUIT FOR OPEN CIRCUIT •  Verify that the theft-deterrent siren and theft-deterrent control module connectors are disconnected. •  Turn the ignition switch to the LOCK position. •  Disconnect the negative battery cable. •  Inspect for continuity between theft-deterrent siren terminal B (wiring harness-side) and theft-deterrent control module terminal C (wiring harness-side). •  Is there continuity?	Yes	Go to the next step.
		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
6	INSPECT THEFT-DETERRENT SIREN •  Inspect the theft-deterrent siren. (See THEFT-DETERRENT SIREN INSPECTION.) •  Is there any malfunction?	Yes	Replace the theft-deterrent siren, then go to the next step. (See THEFT-DETERRENT SIREN REMOVAL/INSTALLATION.)
		No	Go to the next step.
7	VERIFY TROUBLESHOOTING COMPLETED •  Make sure to reconnect all disconnected connectors. •  Reconnect the negative battery cable. •  Clear DTCs using the M-MDS. (See CLEARING DTC [THEFT-DETERRENT SYSTEM].) •  Perform the theft-deterrent control module DTC inspection using the M-MDS. (See DTC INSPECTION [THEFT-DETERRENT SYSTEM].) •  Is the same DTC present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the theft-deterrent control module. (See THEFT-DETERRENT CONTROL MODULE REMOVAL/INSTALLATION.) Go to the next step.
		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCs ARE PRESENT •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [THEFT-DETERRENT SYSTEM].)
		No	DTC troubleshooting completed.