2001
Chevrolet Corvette Restoration Kit
Tire Pressure Monitor System Description
The Tire Pressure Monitoring (TPM) system allows the driver to monitor the tire pressure
in
all four tires.
Pressing the GAGE 2 button
on
the DIC will display the tire pressure on the IPC
..
The TPM also warns the
driver
of
under and over inflation condition with the following IPC messages:
• HIGH TIRE PRESSURE
• LOW TIRE PRESSURE
•
FLAT TIRE
The TPM system consists
of
four battery powered, water resistant, radio frequency signal generator
sensors and a receiver with
self diagnostic capabilities. A sensor
is
mounted
on
each wheel on the back
of
each valve stem. The valve stem and the sensor battery are integrated and are not serviceable. The
receiver
is
located over the
LH
rear wheelhouse. The TPM system uses the same receiver as the RFA
system. Refer to
Keyless Entry System Description
in
Keyless Entry, for additional information on the
RFAsystem.
The
TPM system receives the information to monitor the tire pressure
in
all four wheels through each of
the sensors. The vehicle must
be
traveling 16-24 km/h (10-15 mph) before the sensors will transmit the
tire pressure information. At this speed, the sensor
roll switches activate
in
order to transmit each unique
location identification code to the receiver. The TPM sensors also send the tire pressure information to
the receiver within the range
of
0-427 kPa (0-60 psi). The receiver interprets this data and sends a
message on the
serial data line to the IPC. The IPC then displays the tire pressure information for each
tire.
Holding a magnet over the valve stem will manually override the sensor for programming or testing
purposes. When the
vehicle has been stationary for more than 1 minute, the sensors enter a power down
or
sleep mode and stop transmitting tire pressure information. This minimizes the battery consumption
rate.
The
TPM system uses barometric pressure information
in
order to determine how to compensate tire
pressure readings for different
altitudes. The receiver requests the information from the Powertrain
Control Module (PCM)
when the ignition
is
first turned to ON. If the receiver
is
unable to receive the
information from the
PCM, the receiver will substitute a default value and no compensation will occur.
The receiver
also warns the driver
of
a tire over or under inflation condition. If the TPM sensors transmit a
reading
of
over 289 kPa (42 psi), the receiver will send a message to the IPC to display the HIGH TIRE
PRESSURE
warning message. If a tire pressure reading between 34-172 kPa (5-25 psi)
is
sent, the
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