Initializing Tire Pressure Monitor System

CAUTION: Set tire pressure within the specified range before initializing. DO NOT push the reset switch without adjusting tire inflation pressure of all 5 tires (including the spare tire). Otherwise, the low tire pressure warning light may not come on even if the tire pressure is low, or it may come on when the tire inflation pressure is actually normal. If you push the reset switch while the vehicle is moving, initialization is not performed.

NOTE: The initialization mode can be terminated by making a short circuit between terminals No. 4 and 13 of the DLC3 connector (located under left side of instrument panel).

NOTE: When initializing the system, the present tire condition is stored as a standard.

During initialization, the tire pressure monitor valve sub-assembly measures the inflation pressure of the tires, and registers the signals that are transmitted into the tire pressure monitor ECU at a frequency of one per minute. The initialization process is completed when the signals from the 5 tires have been received.

The initialization process is canceled if the ignition switch is turned to OFF position during initialization. To initialize again, the tire pressure warning reset switch must be pressed again. For this reason, once the tire pressure warning reset switch has been pressed, turning ignition switch to OFF position is not recommended for a minimum of 20 minutes.

Set the tire pressure of all wheels (including spare tire) to pressure specified on the tire and loading information label.
With the vehicle stopped and parking brake applied, turn the ignition switch to the ON position.
Press and hold the tire pressure warning reset switch (located under steering wheel) until the tire pressure warning light blinks 3 times at one-second intervals.
After 2-3 minutes, the initialization process should be completed. If the initialization has not been completed successfully, Diagnostic Trouble Code (DTC) C2177/77 is set in the tire pressure monitor ECU about 20 minutes after driving starts.
Confirm that initialization is complete using the intelligent tester. This may be done by checking for the test DTCS (C2181/81 to C2191/91) to be indicated, or by ensuring that tire pressure values can be displayed on the tester (it can take 2-3 minutes to display tire pressure data).
NOTE: If outside temperatures are very low (such as in winter), which can cause decreases in tire pressure, leave ignition on for about 20 minutes after confirmation that initialization has been completed, and increase the tire inflation pressure by 3-4 psi (20-30 kPa).