Honda Accord 2008 Manual page 1390

07/11/02 09:28:48 61TA0000_180_0057
General Troubleshooting Information
System Indicator Locations
The system has two indicators.
• The low tire pressure indicator (A)
• The TPMS indicator (B)
＊０１
How TPMS Works
The TPMS (tire pressure monitoring system) has a low
tire pressure indicator and a TPMS indicator. When the
TPMS control unit detects low pressure in a tire, or a
problem in the system, it turns on the appropriate
indicator.
• If low tire pressure is detected in one or more tires,
the low tire pressure indicator comes on.
• If a problem in the system is detected, the TPMS
indicator comes on.
• If low tire pressure and a problem in the system are
detected, only the TPMS indicator comes on.
A B
If the system is OK, the TPMS indicator and the low tire
pressure indicator should come on when you turn the
ignition switch to ON (II), and then go off 2 seconds
later. If they don't, there is a problem with the system.
If the system detects low pressure in any of the four
tires, the low tire pressure indicator comes on, and the
control unit will set one or more of these codes:
DTC 11, 13, 15, 17. When the tire pressure returns to
normal, the control unit turns off the indicators and
stores the DTC(s). However, if the control unit detects a
problem in the system during an indication of low tire
pressure, it turns off the low tire pressure indicator,
stores the DTC(s), and turns on the TPMS indicator(s).
NOTE: Tire pressures increase slightly as the
temperature in the tires rises during driving at highway
speeds. Pressures can also increase or decrease
slightly with changes in outside air temperature.
A temperature change of about 18 °F (10 °C) changes
tire pressure by about 10 kPa (0.1 kgf/cm , 1.5 psi). If the
temperature drops, tire pressure could decrease just
enough to turn on the low tire pressure indicator, but
later, the tire temperature could increase enough to
turn the indicator off. To resolve a complaint of such
intermittent indications, confirm and clear the stored
DTC(s) and check the tire pressures. Then explain to the
customer how temperature changes can affect the
system, especially when tire pressures are near the low
end of the TPMS normal range - 168 to 220 kPa (1.7 to
2
2.2 kgf/cm , 24 to 32 psi).
If a problem is detected in the system, the TPMS
indicator comes on and stays on until the system
returns to normal with most DTCs. If DTC 81, 83 or 85 is
set, the TPMS indicator goes off only when the ignition
switch is turned to LOCK (0).
When a flat tire is replaced with the spare tire, the
TPMS indicator comes on (DTC 32, 34, 36 or 38)
because the system is no longer receiving the signal
from the flat tire's transmitter.
This is not a problem with the spare tire.
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2
(cont'd)
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