WHEEL AND TIRES
02-12–7
02-12
Low-pressure determination
• When tire pressure data is lower than the detection value configured in the instrument cluster, the instrument
cluster determines that the tire for that wheel unit has low tire pressure.
— If low tire pressure is determined when the ignition is on, the TPMS warning light is illuminated.
— If low tire pressure is determined when the ignition is off, the instrument cluster performs an open-circuit
check
*1
on the TPMS warning light after the ignition is turned on, and then illuminates the TPMS warning
light.
• The low-pressure determination is retained until tire pressure data from the applicable wheel unit returns to the
preset value.
— If tire pressure data that is higher than the specified value is received when the ignition is on, the TPMS
control module turns out the TPMS warning light.
— If tire pressure data that is higher than the specified value is received when the ignition is off, the module
performs an open-circuit check
*1
on the TPMS warning light after the ignition is turned on and turns out the
TPMS warning light.
*1
: The TPMS control modules turns on the TPMS warning light for 3 s after the ignition is turned on for an
open-circuit check of the TPMS warning light.
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TIRE PRESSURE MONITORING SYSTEM (TPMS) WARNING LIGHT CONSTRUCTION
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• The TPMS warning light is built into the
instrument cluster.
• In the event of any abnormality in tire pressure or
in the system, signals illuminate the warning light
to alert the driver.
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CONTROLLER AREA NETWORK (CAN) OUTLINE
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• The instrument cluster receives information using the CAN system. See Section 09 for detailed information
regarding the CAN system.
Received Information from PCM
• Vehicle speed
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TPMS
WARNING
LIGHT
PRESET
AIR PRESSURE
SPECIFIED
AIR PRESSURE
LOW LIMIT
AIR PRESSURE
DETECTED
AIR PRESSURE
ON
OFF
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TPMS WARNING LIGHT
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3423-1U-06H(02-12).fm 7 ページ ２００６年１１月２２日 水曜日 午前１１時１４分
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