Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Remote Control Components

The remote control system comprises of the following components:

  • FFBH
  • FFBH remote control
  • FFBH receiver
  • Antenna and antenna amplifier
  • Antenna harness to connect receiver co-axial cable to existing DAB antenna in side window.

Fuel Fired Booster Heater - Remote Control

Fuel Fired Booster Heater - Remote Control

  1. On button
  2. Off button
  3. LED operation indicator
  4. Antenna

The remote control allows the driver to remotely activate the FFBH without entering the vehicle. The remote control has a range of at least 100m (328ft) in free space, although this distance may be decreased depending on the location of obstacles such as buildings. The remote control is powered by a 3.3volt CR1/3N replaceable battery which can be accessed by removing a cover from the rear of the remote control. The battery life in the remote control is approximately 300 FFBH cycles. One cycle is defined as a remote control button press followed by 30 minute burn time with flashing LED feedback.

The remote control has a green LED to indicate the FFBH is active. When the 'ON' button is pressed on the remote control for more than 2 seconds, the LED will illuminate for 2 seconds. After the 2 second period has passed, the LED will illuminate for 50ms every 2 seconds for up to the 30 minute on time of the FFBH. The LED will only stop flashing if the 'OFF' button is pressed or the 30 minute on timer has elapsed.

Remote Control LED Indicator Functionality

The LED illuminates in different ways to alert the driver to the various states of the FFBH remote control system as follows:

  • Illuminates green for 2 seconds when the ON button has been pressed to show that the receiver unit has successfully received the remote control on request. The FFBH may now start operating providing that fuel level, battery voltage and coolant temperature variables are within limits
  • Flashes green for 50 ms every 2 seconds to indicate that the FFBH may be active.
  • Illuminates red for 2 seconds when the OFF button has been pressed to show that the receiver unit has successfully received the remote control off request. The FFBH should then stop operating.
  • Flashes green or red for 2 seconds when pressing the ON or OFF buttons to indicate that the signal was not received by the FFBH receiver.
  • Illuminates orange before changing to green or red to show that remote control battery voltage is low.
  • Flashes orange for 5 seconds to show that signal was not received by the FFBH and that the remote control battery requires replacement.

Remote Control Pairing

Each remote control must be 'paired' to the receiver to enable communications. Each remote control has a unique identification number which is stored by the receiver. The receiver can store up 3 remote control identification numbers. If a fourth remote control is paired to the receiver, the receiver will replace the first paired remote control number with that for the fourth remote control in the receiver memory. Subsequently, the first paired remote control will no longer be paired and will not be recognized by the receiver.

The following procedure details the pairing process:

  • Remove fuse F7 from the RJB
  • Wait for a minimum of 5 seconds
  • Replace fuse to position F7 in the RJB
  • Within 5 seconds of replacing the fuse (and restoring the receiver power supply), press and hold the remote control OFF button
  • Confirmation of successful pairing is displayed by the remote control LED illuminating in a red color for 2 seconds

NOTE: The pairing process relies on the FFBH receiver having the power supply removed and then the power supply re-instated. The fuse method is the easiest method but it can also be achieved by battery disconnection or removal of the harness connector from the receiver unit.

Fuel Fired Booster Heater - Receiver

Fuel Fired Booster Heater - Receiver

The receiver is located in the left side of the luggage compartment. The receiver is mounted on an integral bracket which in turn is attached to the audio system bracket which locates the gold plated TV antenna.

The receiver is connected to the antenna on the left side window with a coaxial cable. RF signals from the remote control are received by the antenna and passed via the antenna matching unit and co-axial cable to the receiver.

The receiver processes the signals and transmits appropriate messages to the FFBH on a dedicated bus.

Antenna and Antenna Amplifier

Antenna and Antenna Amplifier

The FFBH antenna is located in the rear left side window and uses the same antenna elements as used by the gold plated TV antenna system.

The antenna amplifier, a flying lead from this unit connects directly to a stud on the glass antenna. The receiver unit connects to the amplifier via a coaxial cable.

The glass mounted antenna receives RF transmitted signals from the remote control and transmits them, via the amplifier and co-axial cable, to the FFBH receiver.


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