Land Rover Anti Lock Control Traction Control Rover Manual

TIRE PRESSURE MONITORING SYSTEM (TPMS)
Tire Pressure Monitoring System - Component Location
Wheels and TiresLesson 2 – Chassis
37Technical Training (G421048) 

Initiator1
Tire pressure sensor2
Instrument cluster3
TPMS module4
TPMS switch (Not available on NAS vehicles)5
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...

The TPMS module is located above the headlining of
the vehicle, mounted directly to the central roof
cross-beam, behind the sunroof. The module is retained
in position with two screws which secure into weldnuts
on the cross beam. The three connectors of the module
point towards the front of the vehicle.
The TPMS module’s main function is to detect the
following:
•the tire pressure is below the recommended low
tolerance value – under inflated tire
•the tire pressure is below the recommended lower...

As each wheel responds to the LF signal from the TPMS
module, it is assigned a position on the vehicle and is
monitored for the remainder of that drive cycle in that
position.
Once the wheel position is established, the signal
transmissions from each wheel continue at 1 minute
intervals whilst the vehicle is being driven. This
transmission is to monitor the tire pressure. There are
two levels of warning; amber warning indicator
illuminated at 25% deflation and red warning indicator
illuminated at 35%...

Tire Pressure Sensor
The TPMS system uses ‘active’ tire pressure sensors
which are mounted on each wheel, inside the tire cavity.
The sensor is retained in position by the valve
attachment to the wheel structure. The sensors transmit
their RF signals at either 315 MHz or 433 MHz
dependent on market requirements.
The sensors periodically measure the pressure and
temperature of the air inside the tire. Pressure and
temperature measurements are transmitted periodically
to the RF receiver in the vehicle.
The...

The TPMS switch is a non-latching push button switch
which is located in the center console switch pack,
adjacent to the hazard warning switch.
The TPMS switch is used by the driver to set the
required target pressures for the vehicle, i.e. ‘normal
load’ or ‘high load’. The switch is used to toggle
between the two modes.
The TPMS switch has a status LED, located in the face
of the switch, which informs the driver when the ‘normal
load’ or ‘high load’ pressures are set. When normal
load mode is set, the...

Low line instrument clusterA
High line instrument clusterB
Amber warning indicator1
Red warning indicator2
Message center3
The warning indications to the driver differ between the
specification of instrument cluster fitted to the vehicle.
On vehicles with a low line instrument cluster, tire
pressure warnings are conveyed to the driver by amber
and red LED warning indicators. On high line
instrument clusters, warnings are conveyed by an amber
LED warning indicator and a text message displayed in
the...

High Line Instrument ClusterLow Line Instrument ClusterEvent
TYRE PRESSURES VERY LOW
message displayed.
Sounder activated once when
message is displayed.
Sounder activated once before Amber
LED illuminated, message displayed
and vehicle speed increased from 0
to 37 mph (0 to 60 km/h).
Amber and Red LEDs illuminated
Sounder activated on detection of
each major warning event.
Sounder activated once before Amber
and Red LEDs illuminated and
vehicle speed increased from 0 to 37
mph (0 to 60 km/h).
Major...

High Line Instrument ClusterLow Line Instrument ClusterEvent
Amber LED illuminated.
Amber LED illuminated at next and
subsequent ignition on cycle.
Sounder activated on detection of
each additional wheel sensor fault
event.
TYRE PRESSURE MONITORING
SYSTEM FAULT message
displayed.
Amber LED remains illuminated.
Amber LED illuminated at next and
subsequent ignition on cycle.
Sounder activated on detection of
each additional wheel sensor fault
event.
More than one TPMS wheel sensor
fault
TPMS switch status...

Inputs and Outputs
Connector C24471
Connector C15372
Not used3
Two connectors provide the interface between the TPMS
module and the external TPMS components. The third
connector aperture on the TPMS module is not used.
The following tables show the details of the signals or
electrical supplies on each connector pin.
Connector C1537
Input/OutputDescriptionPin No.
-Not used1
Input/OutputCAN LOW - IN2
Input/OutputCAN HIGH - IN3
-Not used4
OutputTPMS Switch LED Drive5
-Not used6
InputTPMS Switch7...