Tire Pressure Monitoring System; General Description; Tire Pressure Monitor Description And Operation - Suzuki XL7 2007 Service Manual

10D-1 Tire Pressure Monitoring System:

Tire Pressure Monitoring System

General Description

Tire Pressure Monitor Description and Operation

The Tire Pressure Monitor (TPM) system warns the driver when a significant loss of tire pressure occurs in any of the
4 tires, allows the driver to display the individual tire pressures, and their locations on the driver information center
(DIC).
The system uses the powertrain control module (PCM), body control module (BCM), instrument panel cluster (IPC),
DIC, remote control door lock receiver (RCDLR), a radio frequency (RF) transmitting pressure sensor in each wheel/
tire assembly, and the serial data circuit to preform the system functions.
When the vehicle is stationary and the sensor internal roll switches are open for at least 30 seconds, the sensors go
into stationary mode. In this mode, the sensors sample tire pressure once every 20 seconds and transmit a stationary
mode transmission once every 60 minutes. As vehicle speed increases, centrifugal force closes the sensor internal roll
switch causing the sensors to go into drive mode. In this mode, the sensors sample tire pressure once every 30
seconds and transmit a drive mode transmission once every 60 seconds. The RCDLR receives and translates the
data contained in each sensor RF transmission into sensor presence, sensor mode, and tire pressure. The RCDLR
then sends the tire pressure and tire location data to the DIC via the serial data circuit, where they are displayed as
follows:
• LF TIRE XX PSI
• RF TIRE XX PSI
• RR TIRE XX PSI
• LR TIRE XX PSI
The sensors continuously compare their current pressure sample with their last pressure sample and will transmit in
re-measure mode whenever a 1.6 psi change in tire pressure has occurred. When the TPM system detects a
significant loss of tire pressure, the CHECK TIRE PRESSURE message is displayed on the DIC and the low tire
pressure indicator is displayed on the IPC. Both the DIC message and IPC indicator can be cleared by adjusting the
tire pressure to the recommended kPa/psi. Refer to "Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts
ID Label: ". The sensor pressure range is 0-703 kPa (0-102 psi). The sensor pressure accuracy from −10 to +70°C
(+14 to +158°F) is plus or minus 14 kPa (2 psi).
The RCDLR has the ability to detect malfunctions within the TPM system. Any malfunction detected will cause the DIC
to display the SERVICE TIRE MONITOR message. For more information on other functions of the RCDLR, refer to the
following:
• "Keyless Entry System Description and Operation: "
• "Control Module References: "