Remote Handset (RF Transmitter) (Electrical)

Remote Handset (RF Transmitter)

Two remote handsets are supplied with each vehicle. Two buttons on the handset control the locking and unlocking and alarm arm and disarm functions remotely. The remote handset transmits a coded signal which is recognized by the RF receiver. If the handset battery is removed or changed, or the vehicle battery is disconnected, the synchronization of the handset and the RF receiver will be lost.

Remote Handset Re-synchronization

Re-synchronization can be achieved by inserting the vehicle key in the ignition switch. Turning on the ignition causes the CCU to transmit a signal from the passive coil which surrounds the ignition switch. This in turn causes the handset to transmit a re-synchronization code and will synchronize the handset with the CCU automatically. Re-synchronization can also be achieved using the handset by operating either handset button five times in quick succession with the ignition off.

Remote Handset Battery Low Warning

If the remote handset battery voltage becomes low, when the handset transmits a signal to the CCU, it also transmits a low battery signal when the driver’s door is opened. The CCU buzzer sounds a 10 second warning and the alarm LED flashes for 10 seconds to signify to the driver that the handset battery requires replacement. When the battery is replaced, the remote handset will require re-synchronization with the CCU.

Mobilisation/Immobilisation

Engine immobilisation

The engine immobilisation feature disables the starter relay operation and also prevents the CCU sending a coded signal to the Engine Control Module to enable the engine management system. If the engine is immobilised with the alarm disarmed and the ignition off, the alarm LED will slow flash. If the engine is immobilised with the ignition on, the alarm LED will be permanently illuminated.

Passive Immobilisation

Passive immobilisation occurs, following a delay of 5 seconds, if the ignition is turned off and the driver’s door is opened. Turning off the ignition and the CCU not sensing the ignition for 5 minutes will also invoke the passive immobilisation.

Passive Re-Mobilisation

Passive re-mobilisation occurs when the CCU receives an unlock request from the remote handset.

Passive re-mobilisation will also occur by turning on the ignition with the remote handset within 70 mm of the passive coil surrounding the ignition switch attached to the key ring. When the ignition is turned on, with the vehicle disarmed and immobilised, the CCU transmits a ’ringing waveform’ signal through the passive coil. The passive coil in turn, excites the remote handset to transmit a re-mobilisation signal. If the CCU does not receive a valid code within 60 seconds of the ignition being turned on, the handset will stop transmitting the signal until the ignition is turned off and on again.

If two handsets are on the same key ring, passive re-mobilisation will not occur because both handsets will transmit together and corrupt each handset signal.