False Alarm Siren Activation - Siren Sounds Genuine Accessory

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

This diagnostic procedure should be used in the case of the following: The alarm siren activates for no apparent reason. The alarm system monitors various input signals from the alarm system sensing components and if these signals do not conform or are invalid, then a false trigger of the alarm system may result. False alarm triggers may be caused by the following:

Schematic Reference

Theft Deterrent System Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Hanging Items Causing Movement in the Cabin

Items hanging in view of the ultrasonic sensors that may swing can cause a false alarm trigger. Ensure that no hanging items swing after the alarm is armed.

Loose or Poor Battery Connections

Inspect the vehicle battery for firm and clean terminal connections. If loose or faulty terminal connections are present then proceed with the following:

1. Ignition OFF, key removed.
2. Disconnect and appropriately clean the negative battery terminal and negative battery post.
3. Disconnect and appropriately clean the positive battery terminal and positive battery post.
4. Connect the positive battery terminal and tighten to 18 Nm (13lb ft).
5. Connect the negative battery terminal and tighten to 18 Nm (13lb ft).
6. Lock the vehicle using the remote transmitter key function. After 10 seconds unlock the vehicle using the remote transmitter key function.
7. Perform a full ignition cycle.

Tampering of Battery Power or Earth Connections

Ensure that the terminals are firmly attached to the battery and that the battery or wiring has not been tampered with.

Battery Quiescent Current Draw is too High.

1. Ensure that no electrical consumers remain ON when the vehicle is locked/alarm system armed.
2. Perform a Battery Electrical Drain/Parasitic Load Test. Refer to Battery Electrical Drain/Parasitic Load Test .

Ultrasonic Sensitivity Set too High

1. Ignition OFF, locate the ultrasonic module sensitivity adjustment screw.
2. Using a suitable flat blade screwdriver, turn the ultrasonic sensitivity adjustment screw on the ultrasonic module until the marker indicates a lower value. A setting of between 2 and 3 is recommended (do not set to a value of 1).

Function test the alarm ultrasonics before reassembling the vehicle. Adjust the ultrasonic sensitivity if further adjustment is necessary.

Ultrasonic Sensors Incorrectly Connected to the Ultrasonics Module

1. Locate the 2-terminal connector socket on the ultrasonics module marked 'RED'. Ensure that one of the wires that is on the plug connector that connects to the socket marked 'RED' is in fact RED.
2. Locate the 2-terminal connector socket on the ultrasonics module marked 'BLACK'. Ensure that one of the wires that is on the plug connector that connects to the socket marked 'BLACK' is either BLACK or WHITE.
3. Ensure that the 4-terminal connector is firmly connected to the centre location on the ultrasonic module.

Tilt Sensor Not Securely Mounted

1. Locate the tilt sensor mounting bolts.
2. Ensure that the tilt sensor mounting bracket bolts are tightened to 6 Nm.
3. Ensure that the plastic case of the tilt sensor is firmly attached to the mounting bracket.
4. Ensure that the harness connector is firmly connected to the tilt sensor.

For component removal and installation refer to the accessory fitting instructions.