DTC B10A5:87 [BCM]

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Malfunction Location

• Communication error between theft-deterrent siren and BCM

Detection Condition

• Communication error between theft-deterrent siren and BCM

Possible Causes

• Open or short circuit in wiring harness between theft-deterrent siren and BCM

• Theft-deterrent siren malfunction

• BCM malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

INSPECT THEFT-DETERRENT SIREN CONNECTOR

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the theft-deterrent siren connector.

•  Inspect the theft-deterrent siren connector (corrosion, damage, and disconnected pins).

•  Are the connector and terminals normal?

Yes

Go to the next step.

No

Repair/replace the theft-deterrent siren connector or terminal.

2

INSPECT BCM CONNECTOR

•  Disconnect the BCM connector.

•  Inspect the BCM connector (corrosion, damage, and disconnected pins).

•  Are the connector and terminals normal?

Yes

Go to the next step.

No

Repair/replace the BCM connector or terminal.

3

INSPECT WIRING HARNESS BETWEEN THEFT-DETERRENT SIREN AND BCM

•  Inspect the wiring harness between theft-deterrent siren connector terminal B and BCM connector terminal 6H for the following:

―  Short to body ground

―  Short to power supply

―  Open circuit

•  Is the wiring harness normal?

Yes

Go to the next step.

No

Repair or replace the wiring harness between the theft-deterrent siren and the BCM.

4

INSPECT THEFT-DETERRENT SIREN

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable.

•  Switch the ignition to ON.

•  Inspect the theft-deterrent siren.
(See THEFT-DETERRENT SIREN AND TILT SENSOR INSPECTION.)

•  Is the theft-deterrent siren normal?

Yes

Replace the theft-deterrent siren, then go to the next step.

(See THEFT-DETERRENT SIREN AND TILT SENSOR REMOVAL/INSTALLATION.)

No

Go to the next step.

5

INSPECT DTCs

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Verify DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)

•  Is DTC B10A5:87 displayed again?

Yes

Replace the BCM.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

No

DTC troubleshooting completed.

Step	Inspection		Action
1	INSPECT THEFT-DETERRENT SIREN CONNECTOR • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the theft-deterrent siren connector. • Inspect the theft-deterrent siren connector (corrosion, damage, and disconnected pins). • Are the connector and terminals normal?	Yes	Go to the next step.
1		No	Repair/replace the theft-deterrent siren connector or terminal.
2	INSPECT BCM CONNECTOR • Disconnect the BCM connector. • Inspect the BCM connector (corrosion, damage, and disconnected pins). • Are the connector and terminals normal?	Yes	Go to the next step.
2		No	Repair/replace the BCM connector or terminal.
3	INSPECT WIRING HARNESS BETWEEN THEFT-DETERRENT SIREN AND BCM • Inspect the wiring harness between theft-deterrent siren connector terminal B and BCM connector terminal 6H for the following: ― Short to body ground ― Short to power supply ― Open circuit • Is the wiring harness normal?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness between the theft-deterrent siren and the BCM.
4	INSPECT THEFT-DETERRENT SIREN • Reconnect the disconnected connectors. • Connect the negative battery cable. • Switch the ignition to ON. • Inspect the theft-deterrent siren. (See THEFT-DETERRENT SIREN AND TILT SENSOR INSPECTION.) • Is the theft-deterrent siren normal?	Yes	Replace the theft-deterrent siren, then go to the next step. (See THEFT-DETERRENT SIREN AND TILT SENSOR REMOVAL/INSTALLATION.)
4		No	Go to the next step.
5	INSPECT DTCs • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Verify DTCs using the M-MDS. (See DTC INSPECTION [BCM].) • Is DTC B10A5:87 displayed again?	Yes	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
5		No	DTC troubleshooting completed.