Tire Pressure Warning Reset Switch; Tire Pressure Warning Light - Toyota 2006 PRIUS Manual

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NEW FEATURES - TIRE PRESSURE WARNING SYSTEM

6. Tire Pressure Warning Reset Switch

" By operating the tire pressure warning reset switch, the tire pressure warning ECU can be set to issue a
warning at the tire pressure that corresponds to the type of tires. Therefore, the dealer must set the warning
threshold to the proper value in order to comply with the local regulations.
" Operate the tire pressure warning reset switch only after the tire pressure of all 4 tires has been adjusted
on the vehicle.
" To initialize the system, press and hold the tire pressure warning reset switch for 3 seconds or longer with
the power source mode IG-ON. After the system has been initialized, the warning light blinks 3 times at
0.5Hz.
" During initialization, the tire pressure sensor measures the tire pressure, and registers the signals that are
transmitted into the tire pressure warning ECU at a frequency of one per minute. The initialization process
is completed when the signals from the 4 tires have been received.
Service Tip
" Since the initialized values are dependent upon the accuracy of the tire pressure gauge to be used,
make sure to use a tire pressure gauge that has been properly calibrated.
" The system must be initialized in the following conditions:
1) New vehicle delivery
2) Tire pressure sensor replacement
3) Replacement with tires of different size (tire pressure)
4) Tire pressure warning ECU replacement
Caution
If the system is initialized with tires whose tire pressure deviates from the threshold pressure, the
system will accept initialization at those values. Therefore, make sure to initialize only after the tires
have been inflated to the specified tire pressure.

7. Tire Pressure Warning Light

" The tire pressure warning light is located in the combination meter.
" This warning light illuminates or blinks in accordance with signals from the tire pressure warning ECU
if the vehicle's own tires are inflated with low pressure or if a malfunction occurs in the system.
" The output operations of the tire pressure warning light are listed below.
Condition
System check
Low tire pressure detected
Tire pressure initialization
System failure
Illuminates for 3 seconds
(Power source mode selected to IG-ON, when system is normal)
Blinks 3 times at 0.5 Hz
(When tire pressure warning reset switch is pressed for 3 seconds or
After blinking for 1 minute, illuminates
Outline
Illuminates
longer)