Land Rover Discovery: Wheels and Tires - Overview
Overview
COMPONENT LOCATION
NOTE:
Only vehicles fitted with a full-size spare wheel are equipped with a
tire pressure sensor in the spare wheel.
TIRE PRESSURE MONITORING SYSTEM (TPMS)
![TIRE PRESSURE MONITORING SYSTEM (TPMS)](images/books/227/index227(12).jpg)
- Instrument Cluster (IC)
- Tire Pressure Monitor (TPM) module
- Tire Pressure Sensor - 4 off
OVERVIEW
Tire Pressure Monitoring System (TPMS)
The purpose of the Tire Pressure Monitoring System (TPMS) is to assist the
driver in maintaining the vehicle's tire pressures at the optimum level in
order to:
- improve fuel consumption
- maintain ride and handling characteristics
- reduce the risk of rapid tire deflation - which may be caused by under
inflated tires
- comply with legislation in relevant markets.
The TPMS measures the pressure in each of the tires on the vehicle and
issues warnings to the driver if any of the pressures deviate from defined
tolerances.
NOTES:
- During a tire 'blow-out' a very rapid reduction in pressure is
experienced. The system is not intended to warn the driver of a
'blow-out', as it is not possible to give the driver sufficient warning
that such an event is occurring, due to its short duration. The
design of the TPMS is to assist the driver in keeping the tires at the
correct pressure, which will tend to reduce the likelihood of a tire
'blow-out' occurring.
- TPMS is inhibited when the vehicle is in Delivery mode. For more
details on Delivery mode refer to the PDI manual.
A single TPMS hardware configuration is used. TPMS status information is
relayed to the driver with a message displayed in the Instrument Cluster (IC)
message center and an amber warning indicator.
TIRES
CAUTION:
Care must be taken when removing and refitting tires to ensure that
the tire pressure sensor is not damaged.
NOTES:
![TIRES](images/books/227/index228.gif)
- Tire valve and pressure sensor
- Tire fitting/removal tool initial start position
- High tire and bead tension area
- Low tire and bead tension area
When removing the tire, the bead breaker must not be used within 90
degrees of the tire valve in each direction.
When using the tire removal machine, the fitting arm start position must be
positioned as shown in the tire changing illustration. The wheel can then be
rotated through 180 degrees in a counterclockwise direction. This will
relieve the high tension from the tire bead allowing the remaining 180
degrees of the tire to be manually pulled from the rim.
When refitting the tire, position the fitting arm as shown. Rotate the tire and
take care that the bead on the low tension side of the tire does not damage
the sensor.
TREAD ACT - NAS ONLY
Vehicles supplied to the North American markets must comply with the
legislation of the Transport Recall Enhancement, Accountability and
Documentation (TREAD) act. Part of the requirement of the TREAD act is for
the vehicle to display a label, positioned on the driver's side B-pillar, which
defines the recommended tire inflation pressure, load limits and maximum
load of passengers and luggage weight the vehicle can safely carry. This
label will be specific to each individual vehicle and will be installed on the
production line.
This label must not be removed from the vehicle. The label information will
only define the specification of the vehicle as it came off the production line.
It will not include dealer or owner fitted accessory wheels and tires of
differing size from the original fitment.
NOTES:
- If tires and wheels of a non-standard size are fitted to the vehicle,
the car configuration file must be updated using a Land Rover
approved diagnostic system.
- If the label is damaged or removed for body repair, it must be
replaced with a new label specific to that vehicle. A new label is
requested from Land Rover parts and will be printed specifically for
the supplied VIN of the vehicle.
READ NEXT:
TIRE LOCATION
Because of the requirement for different pressure targets and thresholds for
the front and rear tires, the Tire Pressure Monitoring System (TPMS) can
identify the location of the tires o
PRINCIPLES OF OPERATION
NOTE:
Check DDW for open campaigns. Refer to the corresponding
bulletins and SSMs which may be valid for the specific customer
complaint and carry out the recommendations as re
NOTES:
This document describes the fault diagnosis to establish what the
fault is with the TPMS system.
The majority of TPMS faults, are not faults, but low pressure
warnings, indicating the tire
SEE MORE:
NOTE:
The roof panel is installed in conjunction with:
Windshield
Headliner
Front seat
Rear seat cushion
Side air curtain module
Roof moulding
Liftgate
Antenna
The roof panel is serviced as indicated.
Before commencing this procedure make sure that you are aware of
all Health and Saf
Installation
NOTES:
Steps 1 to 5 must only be performed to the components were
previously removed.
Steps 14 to 20 must be performed to the components on both
sides of the vehicle.
All vehicles
Install the noise, vibration and harshness damper.
Torque: 24 Nm
Install the steering gear.
Torque: