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

NOTE: Perform the tire pressure adjustment after the vehicle has sufficiently cooled down. If it hasn't sufficiently cooled, increase the air pressure in the tires approximately 3-4psi (20-30kPa)

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).

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 4 tires have been received.

The initialization process is canceled if the ignition switch is turned to OFF position prior to the completion of initialization. To restart initialization, the tire pressure warning reset switch must be pressed again.

Set the tire pressure of all wheels to pressure specified on the tire and loading information label.
With the vehicle parked in a safe place, connect the intelligent tester to the DLC3 and turn POWER switch to the ON position.
Turn the intelligent tester ON and navigate to the "TIREPRESS" option using the on-screen prompts.
Within 30 seconds of turning the ignition ON, press and hold the tire pressure warning reset switch (located to the left of the steering wheel) until the tire pressure warning light blinks 3 times at one-second intervals.
Wait 5 - 6 minutes, with the ignition ON, for the initialization process to complete. 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 by verifying that the correct tire pressure values are displayed on the intelligent tester.
NOTE: In winter, tire pressure may decrease due to low ambient temperatures (about 1.45 psi (10 kPa) for every 18°F (10°C) drop in ambient temperature). Therefore, the tire pressure warning is more likely to operate if the tire pressures are not adjusted appropriately. If the daily temperature variation is large, pressurize the tires so that they are in the specified range under cold conditions. With this adjustment, unnecessary warnings are less likely.