Initializing Tire Pressure Monitor System
NOTE:
When a tire pressure sensor and/or tire pressure monitor ECU are replaced, the sensor ID must be memorized by the tire pressure monitor ECU prior to system initialization. See TIRE PRESSURE SENSOR REGISTRATION .
CAUTION:
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:
When initializing the system, the current tire condition is stored as a standard.
During initialization, the tire pressure sensor 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.NOTE: Perform the tire pressure adjustment after the vehicle has sufficiently cooled down. If the vehicle is not sufficiently cooled down, increase the air pressure by 3-4 psi (20-30 kPa) in addition to the specified value.
- 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 until the tire pressure warning light blinks 3 times at one-second intervals. See Fig 1.NOTE: Do not turn the ignition switch to OFF position during initialization (the initialization process takes about 20 minutes). Initialization will be complete if signals are received from all the wheels including the spare. Initialization will be canceled if the ignition switch is turned to OFF position during initialization.NOTE: In winter, as the tire pressure may decrease depending on the ambient temperature, increase the air pressure by 3-4 psi (20-30 kPa) above the specified value 20 minutes after the initialization with the ignition switch in ON position.
- Confirm that initialization is complete using the intelligent tester. Check that, under DATA LIST, the expected pressure for each tire is displayed in "TIREPRESS" values.NOTE: It may take about 2 or 3 minutes until the values are displayed. If the values are not displayed after a few minutes, perform troubleshooting according to the inspection procedure for DTCs C2121/21 to C2125/25.
NOTE:
Initialization can be terminated by connecting terminals 13 (TC) and 4 (CG) of the DLC3. See Fig 2.