WHEEL AND TIRES
02-12–4
TIRE PRESSURE MONITORING SYSTEM (TPMS) CONSTRUCTION/OPERATION
id021200100700
Construction
• The TPMS consists of wheel units that detect air pressure, temperature and acceleration of each tire, and a
TPMS control module that receives data (RF signals) sent from the wheel units to monitor the air pressure of
each tire.
Operation
• The wheel unit installed to each wheel sends data on air pressure, temperature and acceleration of each tire by
means of RF signals. The keyless receiver receives these signals with a built-in antenna.
• With advanced keyless system: Signals received by the keyless receiver are transmitted to the instrument
cluster via the keyless CM.
• With keyless entry system: Signals received by the keyless receiver are transmitted to the instrument cluster.
• The instrument cluster monitors the air pressure of each tire based on the tire data sent from each wheel unit.
If the instrument cluster detects an excessive drop in air pressure or flat tire, the instrument cluster illuminates
the TPMS warning light.
RF SIGNAL
KEYLESS
RECEIVER
WHEEL UNIT
TPMS WARNING
LIGHT
KEYLESS CM
WITH ADVANCED
KEYLESS SYSTEM
WITH KEYLESS
ENTRY SYSTEM
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3423-1U-06H(02-12).fm 4 ページ ２００６年１１月２２日 水曜日 午前１１時１４分
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