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2003 Chevrolet Corvette Restoration Kit
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
receiver sends a message to the IPC to display the LOW TIRE PRESSURE warning message. If the
reading sent is under 34 kPa (5 psi), a FLAT TIRE message will appear.
Electronic Suspension Control Description
The Electronic Suspension Control system, also known as the Magneto-Rheological Real Time Damping
(MRRTD) system independently controls the fluid viscosity in each of the four shock absorbers in order to
control the vehicle ride characteristics. The ESC system is capable of making these changes within
milliseconds. The ESC system consists of the following major components:
•
The electronic suspension (ESC) module
•
. The front/rear position sensors
•
The front/rear adjustable shock absorbers
•
The shock absorber electrical actuators, which are integrated within the shock absorbers.
The ESC controls the damping mode selection according to the following factors:
•
The vehicle speed
•
The chassis pitch input
•
The steering position
•
The body to wheel displacement
The ESC module evaluates these inputs in order to separately control the shock absorbers, providing an
enhanced ride and comfort level over the widest possible range of operating conditions.
Electronic Suspension Control Module
The ESC module provides electronic control logic and output drive for each shock absorber. The ESC
module makes decisions due to road and driving conditions based on various inputs. The ESC module
receives input information by sensors that are directly connected to the ESC module or by other systems
through the serial data line.
The ESC module uses these inputs in order to independently control the shock absorbers at each corner.
The ESC module is located in the LH rear storage.
Electronic Suspension Control Position Sensors
The ESC position sensors provide the ESC module with the body to wheel displacement input. The ESC
module uses this and other inputs in order to control the position of the shock absorber. If any body or
wheel motion is detected, the ESC module will determine how soft or firm each shock absorber should be
to provide the best ride. The ESC position sensors are mounted at each corner of the vehicle between the
control arm and the body.
Electronic Suspension Control Shock Absorber or Strut
The ESC shock absorbers are monotube type which provide damping by increasing magnetic flux to
magnetic particles to resist suspension movement. The ESC shock absorber has the capability of
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