Land Rover Discovery: Telematics / Operation
The Telematics Control Module (TCU) receives the Global System
for Mobile
communications (GSM) and Global Positioning System (GPS) signals. Signal
reception is via roof pod which contains the GPS and GSM antennas.
The GPS signal is received by the antenna and is passed to the GPS signal
splitter. The GPS output from the GPS signal splitter is sent to the TCU for
telematics system use and to the Integrated Audio Module (IAM) for
navigation use.
The GSM signal is received by the roof pod. The signal is
passed by a coaxial
cable directly to the TCU. In the event of a malfunction of the roof
pod, the backup GSM antenna within the TCU will also receive the GSM
signal.
The GSM signal provided by Vodafone enables the TCU to communicate
with the Telematics Service Provider (TSP) Wireless Car. The TSP provides
secure mobile data connection and co-ordinates the sending and receiving
of vehicle data and control commands. Telematics provides two main
services; vehicle and driver.
The Land Rover InControl system includes vehicle services; Breakdown
call (bCall), Emergency call (eCall) and stolen vehicle tracking. Driver
services include mobile phone applications with remote vehicle functions.
Several third party suppliers are integral to the InControl system. In each
market emergency response agencies are integrated with InControl along
with Land Rover Assistance and Stolen Vehicle Tracking.
A dedicated smart phone application and the InControl owner website
are available to provide an intuitive and secure interface for InControl
users. An administration website is available for dealerships to set up and
manage customer accounts.
The TCU receives the following inputs:
- Hardwired and CAN crash signal from the Restraints
Control Module
(RCM) - automatic e-Call activation.
- eCall/bCall switch activation signals
- Microphone signal
- Roof pod or telematics antenna GSM and GPS signals.
The TCU provides the following outputs:
Communication with the vehicle systems is via the MultiCAN
buses,
enabling remote vehicle feature functions. The following TCU primary
communications transmit data on the following MultiCAN buses:
- Engine immobilisation start request ID - Telematics
Control Module to
Central Junction Box - High speed CAN (controller area network)
powertrain systems bus
- Restraints Control Module crash signal
status/verification - Telematics
Control Module to Restraints Control Module - High speed CAN
powertrain systems bus
- Land Rover InControl data - Telematics Control Module -
Medium
speed CAN body systems bus via Gateway Module - Medium speed CAN
body systems bus to Instrument Cluster and Touch Screen.
CONTROL DIAGRAM
NOTE:
A = Hardwired; AN = High speed CAN powertrain systems; AO =
Medium speed CAN body systems; T = Co-axial
- Telematics Control Module (TCU)
- Engine Control Module (ECM)
- Restraints Control Module (RCM)
- Central Junction Box (CJB)
- Telematics speaker
- WiFi signal - TCU internal antenna
- GSM back-up signal - TCU internal antenna
- Ground
- Fuse - located in Rear Junction Box (RJB)
- Fuse - located in Battery Junction Box (BJB)
- Roof pod - GSM antenna
- Roof pod - GPS antenna
- GPS signal splitter
- SIM Card Reader
- Microphone
- Audio Head Unit (AHU) or Integrated Audio Module (IAM)
- bCall switch signal
- eCall switch signal
- Restraints Control Module (RCM) - crash signal
READ NEXT:
REMOVAL
CAUTION:
Prior to any work being undertaken on the telematics
control module,
confirmation is required if there is a stolen vehicle tracking
subscription on the telematics control module. If
COMPONENT LOCATION
TV antenna amplifier/Fuel Fired Booster Heater (FFBH)
receiver
Frequency Modulation (FM) antenna amplifier
Television (TV) antenna amplifier
Amplitude Modulation (AM)/Frequ
Infotainment system On/Off or 'Camera' switch
'Parking Aid' switch (if fitted)
'General Settings' or 'Park Assist' switch
'Home Menu' switch
'Mode' or 'Dual-View' switch
'Media System' switch
SEE MORE:
Draining
CAUTIONS:
The engine cooling system must be maintained with the correct
concentration and type of anti-freeze solution to prevent corrosion
and frost damage. Failure to follow this instruction may result in
damage to the engine.
Engine coolant will damage the paint finished surfaces.
SPECIAL TOOL(S)
DRAINING
WARNING:
Since injury such as scalding could be caused by escaping steam or
coolant, do not remove the filler cap from the coolant expansion tank
while the system is hot.
CAUTIONS:
The engine cooling system must be maintained with the correct
concentration and type of