Volt

Theft Deterrent Alarm Malfunction

The content theft deterrent system uses the security siren as an audible alert device to alert individuals near the vehicle that a vehicle intrusion is occurring. The security is supplied power and ground for operation and communicates with the body control module (BCM) via a dedicated LAN circuit.

Schematic Reference

Immobiliser Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode, completely lower the driver door window and close all vehicle doors, vehicle OFF.
2. Arm the content theft deterrent system by locking the door with the keyless entry transmitter.
3. Without disarming the system, reach in through the open driver window and open the driver door.
4. Verify the theft deterrent alarm is sounding.

⇒	If the theft deterrent alarm is not sounding

Refer to Circuit/System Testing.

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the P25 power sounder content theft deterrent alarm module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 4 and ground.

⇒	If 10 Ω or greater

2.1.	Vehicle OFF

2.2.	Test for less than 2 Ω in the ground circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, repair the open/high resistance in the ground connection.

⇓	If less than 10 Ω

⇓	If less than 10 Ω

3. Vehicle in Service Mode.
4. Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.

⇒	If the test lamp does not illuminate and the circuit fuse is good

4.1.	Vehicle OFF.

4.2.	Test for less than 2 Ω in the B+ circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

⇒	If the test lamp does not illuminate and the circuit fuse is open

4.1.	Vehicle OFF.

4.2.	Test for infinite resistance between the B+ circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

⇒	If infinite resistance, replace the B67 ultrasonic intrusion sensor.

⇓	If the test lamp illuminates

5. Vehicle OFF, disconnect the X6 harness connector at the K9 BCM, vehicle in Service Mode.
6. Test for less than 1 V between the serial data circuit terminal 9 X6 and ground.

⇒	If 1 V or greater

Repair the short to voltage in the circuit.

⇓	If less than 1 V

7. Test for infinite resistance between the serial data circuit terminal 9 X6 and ground.

⇒	If less than infinite resistance

Repair the short to ground in the circuit.

⇓	If infinite resistance

8. Test for less than 2 Ω between the serial data circuit terminal 9 at the K9 BCM X6 harness connector and the serial data circuit terminal 3 at the P25 power sounder content theft deterrent alarm module.

⇒	If 2 Ω or greater

Repair the open/high resistance in the circuit.

⇓	If less than 2 Ω

9. Test or replace the P25 power sounder content theft deterrent alarm module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, programming and setup